4l80e Stuck In 2nd Gear

GM recommends upgrading to the newer connector and wiring harness. R&r trans replace reaction shell and gear. No 3rd or 4th gear: “3-4” clutches are worn out. Transmission runs only in 2nd gear. Though most automatic transmission diagnoses and repairs are beyond the scope of the home mechanic, you can diagnose some common issues without specialized tools or training. Buy 4L80E 1-2 A Shift Solenoid and 2-3 B Shift Solenoid Set 1991 and up GM: Kick-Down Solenoids - Amazon. Again, I'm hopeful this is related to the switch as logging 'current gear' in Hptuners shows that it thinks it's in neutral all the time. Installing Sonnax AFL filter end plug. There are four things that can cause your problem. This happens when the shift does not happen until you let off the gear. Park, neutral, reverse are fine. These problems can often be traced to a leaking actuator feed limit (AFL) filter or end plug. 0l which is 4l80e equiped, I did a trans segment swap. This means that if the noise is caused by either planet, it will go away when the transmission shifts to third gear. This is a discussion on A4 4l60e Trans won't shift out of 1st gear within the Automatic Transmission forums, part of the Drivetrain category; I was hearing some grinding at low speeds in 1st gearthought it was just my brakes rubbing due to the. 95 4th gear = 0. 0 vortex max package. drove the van home that evening stuck in second gear and went through 20 gal of gas in 40 miles. 3rd direct W/ 5:38s is like halfway between 3rd and 2nd w/4:57s, which is perfect on hills at 55-60, and is not as big a drop as going all the way down to 2nd and. bought it dec 05 2006. This is likely due to the throttle position sensor, or TPS for short. R&r trans replace reaction shell and gear. Or if it's a quick fix, I'd rather keep the 4l60e until the 4l80e is fully rebuilt. Be sure they are installed in the new transmission. Wear and tear on parts such as bearings or gear teeth often cause noises that indicate a failing transmission. How to 4L60E to 4L80E trans swap. Re: 4l80E conversion and jackshit? how high is really high? a combination of a higher than syock stall and locked in 2nd gear could cause that. This is a computer controlled transmission first introduced in G. This early harness has a problem with leaking fluid at the pass-through connector. Transmission electrical diagnosis troubleshooting help on all your transmission problems or questions. Some of today's transmissions use (PWM) pulse width modulated solenoids that are controlled by a duty cycle. 4L80E Transmission: Pre-1993 4L80E transmissions use a different internal wiring harness and pass-through connector. Crazy coincidence is just last night while I was working, I was talking with another driver and he told me a story about a few trucks of his with 4L80E's in the past where he had lots of solenoid problems. Transmission repairs can be very costly so be sure to completely diagnose and be sure of the symptoms of your problem before you take your car in for a transmission service. If I put it into 2nd instead of Drive when starting out, it seems to go into gear fine so not sure what is going on with it. The 4L60E is a four-speed, electronically controlled automatic transmission used in light-duty trucks made by General Motors (GM). Installing a 4L80E where a 60 once was requires a bit of work and, depending on your chassis, some new parts, but it doesn't take a rocket surgeon to get the swap done. A single gear can be chipped or worn down, allowing only a noise in that gear. 56 and 37's should be about the same. GM 4L80-E and 4L85-E transmissions may have 2nd gear starts and no upshifts, which can be accompanied by trouble codes 68, 85, 86 and/or 87. Sediment and/or metal shavings at the bottom of transmission pan. Undercuts behind the splines are reduced, resulting in increased spline length and diameter, increasing spline engagement at the forward clutch hub and rear internal gear interfaces. This manual can be used in collusion with any type of scanner utilized in retrieving these codes from the computer. My dad has a 96 chevy one ton van. 2-4 band is slipping. Page 3 of 3: Shift Solenoid A and B Tests (GM 4. I'm having almost an identical issue on an 06 TBSS with around 150k miles on her. These problems can often be traced to a leaking actuator feed limit (AFL) filter or end plug. When your transmission "slips", it may show an RPM of 3500+ or take a long time to coast. Almost every rear-wheel drive vehicle manufactured by General Motors features the 4L60E transmission. Under edit menu and calibration details it needs to say 4l80e for trans. (2 springs) 4L80E repeated solenoid B code 86 or 87, no 3rd or 4th gear can be caused by low signal pressure to shift solenoids A and B. Line pressure boost valve #14 Boost oil Rev 4. When I rev up, nothing happens. Technician A says a problem with the circuit's accumulator will result in this condition. An automatic transmission suffers from harsh shifting into second gear. My Transmission Will Not Shift! The transmission is as necessary in a vehicle as the engine itself. Forgive my total ignorance in the field of automatic transmissions. 5 years 2 weeks ago #114503 by Meridivs. It's been shifting in and out of 3rd intermittently. Transmission repairs can be very costly so be sure to completely diagnose and be sure of the symptoms of your problem before you take your car in for a transmission service. FLT 2nd gear clutch kit ; These pins will sometimes get stuck in the engine. Regardless if the wiring is right or wrong, it should go into the right gear if its pulled down to it. 75 (TH400 has same ratios for gears 1 to 3). See all problems of the 2002 GMC Sierra. 1st gear DOES NOT WORK 2nd gear DOES NOT WORK When I pick Drive, 1st or 2nd with the select lever, I hear nothing. i wanted a new transmission but the warranty says rebuild. It suddenly lost power in first gear. If I pull it down to 1,2, or 3 it locks up. The only thing you have in comon in 2nd and 4 th gear that wont cause problems in any other gears is the 2-4 servo and the 2-4 band. GM 4L80E technical information The 4L80E transmission is a four speed automatic with torque converter clutch. on the stand alone systems i work on a bad tos/vss would cause it to lock in second but reverse is fine. No 3rd or 4th gear: “3-4” clutches are worn out. 95 4th gear = 0. net is the home of the Transmission Rebuilders Network offering the leading transmission rebuilder forum in the transmission industry. you can air check it from the pan rail if you pull the pan and look into the window by th efront pump. 0l which is 4l80e equiped, I did a trans segment swap. An automatic transmission suffers from harsh shifting into second gear. second gear…. But instead of shifting to 3rd, when I step back on the throttle, I don't have any. P-R-N-D work, upshifts are erratic and occur at random engine speeds, will not upshift from first gear (no upshifts at all): This problem seems very serious in nature but in fact this is something very simple to fix. I have charged the fliud (World standard) twice and can not tell any big differance. This is a good gamble to repair the code without replacing the transmission and typically costs about $200 to $250. A broken shifting for in the transmission can also cause the. FLT 2nd gear clutch kit ; These pins will sometimes get stuck in the engine. Put it in drive and it feels like it's stuck in second. The most important thing to remember, when trying to decide if you have a solenoid issue or internal transmission damage (causing the transmission to stay in Limp-In mode) is two very important things:. They both have identical or nearly identical gears, except for the addition of a fourth "overdrive" gear in the 4L80E that allows for better highway fuel mileage due to lower engine speeds at the same road speed. Healthy transmissions keep your car in one gear until you decide to change the gear. I Recently ran into a problem with my 05 envoy slt 4x4. This is likely due to the throttle position sensor, or TPS for short. Just as a reference, the writer drives a 98 Tahoe with a BIG Whipple and 383. No 2nd or 4th gear. These problems can often be traced to a leaking actuator feed limit (AFL) filter or end plug. Manual 2nd can be selected at any vehicle speed, but will downshift into 2nd gear, only if vehicle speed is low enough not to over-rev the engine. An automatic transmission suffers from harsh shifting into second gear. 2-4 band is slipping. The speed sensor can cause this type of confusion. EZ-TCU stuck in L2 gear selection. If I pull it down to 1,2, or 3 it locks up. His were having trouble at a lot less than 190K though! The 4L80E is a tough transmission; it sounds like yours has been taken good care of. Or if it's a quick fix, I'd rather keep the 4l60e until the 4l80e is fully rebuilt. We provide a large inventory selection for 4L80E automatic transmission overhaul kits, parts including steels, kits, solenoids, filters, solenoids. The 1st digit being the year, the 2nd digit being the body code, the 3rd being the internal gear-train. Check the wiring harness to the transmission case and make sure that it is plugged in. This happens when the shift does not happen until you let off the gear. Wear and tear on parts such as bearings or gear teeth often cause noises that indicate a failing transmission. 1st gear = 2. Is the trans shifting through all the gears? Symptoms for that code and a bunch of others, are that trans is stuck in 2nd or 3rd gear or instrument panel is not working. this is a computer. Now when I put the truck in "Drive" it doesn't always go into gear right away and revs and then "bangs" into first gear. To put it simply, it is stuck doing what it was doing when the solenoid failed. This is a computer controlled transmission first introduced in G. That may include but is not limited to vehicles from Chrysler, Ford, Dodge, Hyundai, Kia, Ram, Lexus, Toyota, Mazda, Honda, VW, etc. SOURCE: automatic transmission is stuck in 2nd gear (limp mode) most newer vehicles have transmission control modules,that go to a default of 2nd or 3rd gear when they go bad! I had a 91 plymouth stuck in 3rd gear because of this module! could be your problem!. Commonly this problem is caused by a bad speed sensor. To put it simply, it is stuck doing what it was doing when the solenoid failed. What does that mean? This is a generic transmission diagnostic trouble code (DTC) and typically applies to OBD-II vehicles equipped with an automatic transmission. I have a 1992 Chev C3500 Dually 7. starting ratio (1st gear) as the Drive range, but prevents the transmission from shifting above 2nd gear. Buy 4L80E 1-2 A Shift Solenoid and 2-3 B Shift Solenoid Set 1991 and up GM: Kick-Down Solenoids - Amazon. you can pull the servo assm and check it. Be sure they are installed in the new transmission. Could also be a wiring problem to the A solenoid. Use a stock bushing with red loctite and staked in place. The 4L60E and 4L65E are built at Toledo Transmission in Toledo, Ohio and have also been built at Romulus Transmission in Romulus, Michigan and Ramos Arizpe , Mexico. For the 2-piece case it is on a flat surface of the case just behind the rear of the pan. If this is your first visit, be sure to check out the FAQ by clicking the link above. Pulling the 4l60e transmission on Austin's 1993 Chevy 1500 pickup truck - Duration: 7:41. A broken shifting for in the transmission can also cause the. FLT 2nd gear clutch kit ; These pins will sometimes get stuck in the engine. My 1995 gmc has a 4l80e trans also and it stuck in second gear. Repaired for second time parts. Kasey Nesselrotte 16,536 views. Several things can cause your transmission to be stuck in second gear. There is no little clunk like usual. The Gm 4l80E transmission is found in Chevrolet and GMC pick ups, G vans and commercial chassis with GVW of 8600 or greater from 1991 and up thru 2006, Isuzu NPR and NQR trucks as well as GMC/Chevrolet W3500 and W4500 trucks with either the 5. Common problems with the 4L60E transmission include the third and fourth gears not working, slow or slipping reverse gear and sudden grinding noise in second gear. 4l80e transmission. The second sensor is the turbine speed sensor in the main housing, and pics up off of either the PTO gear or a stamped steel tone ring that replaces the PTO gear in units without a PTO option. When your transmission "slips", it may show an RPM of 3500+ or take a long time to coast. Slipping Gears. Buy ACDelco 24230298 GM Original Equipment Automatic Transmission 1-2 and 3-4 Shift Solenoid Valve: Hard Parts - Amazon. EZ-TCU stuck in L2 gear selection. Whether you need 4L80E wiring diagram information, 4L80E transmission rebuilders tips, 4L80E technical information, 4L80E diagnostics, 4L80E troubleshooting help, or just answers to your 4L80E transmission rebuilders question, the Transmission Rebuilders Network is the place to go!. Such noises indicate problems with the individual planetary gears, input shaft or interior transmission bearings. But instead of shifting to 3rd, when I step back on the throttle, I don't have any. Possibly reusing the same Transmission Fluid you need to drain out. drove the van home that evening stuck in second gear and went through 20 gal of gas in 40 miles. You can view the A solenoid activity on to see what you come up with. EZ-TCU stuck in L2 gear selection. Several things can cause your transmission to be stuck in second gear. Chevrolet Impala Transmission Pressure Control Solenoid Failure May Cause Erratic Shifting - 1323 reports. Regardless if the wiring is right or wrong, it should go into the right gear if its pulled down to it. Or if it's a quick fix, I'd rather keep the 4l60e until the 4l80e is fully rebuilt. 4l80e swap stuck in 2nd I've fitted a 4l80e to my Patrol with a LS1 turbo and have only got 2nd and reverse. Some of today's transmissions use (PWM) pulse width modulated solenoids that are controlled by a duty cycle. As an aid to the. Do not confuse a slipping transmission with a solenoid problem. You may have to register before you can post: click the register link above to proceed. Could also be a wiring problem to the A solenoid. How to 4L60E to 4L80E trans swap. Slipping Gears. The 4L80E transmissions have a defect where transmission fluid can leak up into the big round electrical plug and short everything out. When actually it goes in to 2nd. Just as a reference, the writer drives a 98 Tahoe with a BIG Whipple and 383. If this is your first visit, be sure to check out the FAQ by clicking the link above. I have no transmission codes, and the dealer says that it is internal problems. If I pull it down to 1,2, or 3 it locks up. My dad has a 96 chevy one ton van. As an aid to the. Trusted by transmission remanufacturers & valve body rebuilders since 1978. This manual can be used in collusion with any type of scanner utilized in retrieving these codes from the computer. if you have 4th then the band is fine. (2 springs) 4L80E repeated solenoid B code 86 or 87, no 3rd or 4th gear can be caused by low signal pressure to shift solenoids A and B. A 4L80E defaults to 2nd gear when it has no solenoid function. If your car with an automatic transmission is stuck in a certain gear and refuses to shift up or down, there are two common causes. A broken shifting for in the transmission can also cause the. I have the shop manuals that describe the condition and possible cause,. My 700r4 with 3. The 4L80E's ratios from First to Reverse are: 2. Transmission electrical diagnosis troubleshooting help on all your transmission problems or questions. The 4L80E transmissions have a defect where transmission fluid can leak up into the big round electrical plug and short everything out. If your shift solenoids were stuck on or were bad you would have other signs. we've had an m1115 hmmwv in our. i will be taking them up on that new 100,000mile factory warranty. I'm having almost an identical issue on an 06 TBSS with around 150k miles on her. Learn what does P0756 Shift Solenoid 'B' Performance or Stuck Off means, location and how to repair? Shift solenoid valve 'B' is turned ON or OFF by the Transmission Control Module (TCM) in response to signals sent from the park/neutral position (PNP). Installing a 4L80E where a 60 once was requires a bit of work and, depending on your chassis, some new parts, but it doesn't take a rocket surgeon to get the swap done. Technician B says that accumulator's contain a spring that may be broken. If you have reverse and you can get on it in reverse with out it slipping, I would say MAYBE it's not the sunshell. Why is your M1151 4L80E transmission stuck in second gear? the tcm has a hard code stored and has gone into safe mode Why would the transmission hang in first and second gear on a 1988 GMC Rally. It also defaults to max line pressure. But a stock 4L80E and TH400 are both rated at 440 lb/ft for engine torque and 885 lb/ft for gearbox torque. after some hard offroading my 4l80e tranny has decided to stop shifting into second gear. The lower first gear, and OD will work great with that set up. Which is what I have. You may have to register before you can post: click the register link above to proceed. Learn about this problem, why it occurs, and how to fix it. Because of this, we do not provide a wiring harness for it. Commonly this problem is caused by a bad speed sensor. we've had an m1115 hmmwv in our. Learn what does P0756 Shift Solenoid 'B' Performance or Stuck Off means, location and how to repair? Shift solenoid valve 'B' is turned ON or OFF by the Transmission Control Module (TCM) in response to signals sent from the park/neutral position (PNP). In the old 4L60 there is a band that is used for shift down to by pass the second gear sprag clutch. Won't shift manually either. We provide a large inventory selection for 4L80E automatic transmission overhaul kits, parts including steels, kits, solenoids, filters, solenoids. Discover premium quality transmission parts with unmatched reliability, durability & value. 1994 STS 4t80-E transmission stuck in 2nd gear By yahbblack , March 10, 2009 in Cadillac Deville, Eldorado, Seville, Fleetwood, Sixty Special Reply to this topic. GMC 2002 1/2 ton pickup,transmission reverse went out at 44,000 miles (first time it went out at 28,000 miles). Since third gear has a 1:1 ratio, The planetary are not rotating relative to each other while the transmission is in third gear. A bad gear selector switch. the first gear always sounded like it had a whine but at 7,500 miles it has gone. Transmission electrical diagnosis troubleshooting help on all your transmission problems or questions. doc 2005trans6_4L80E. This truck spins through most gears and lifts the front wheels 12" off the ground. 95 Silverado 2500: wheel drive. My agency is getting a 2009 Humvee and they are telling me that It DOES NOT SHIFT INTO HIGHWAY SECOND GEAR MAY BE MODULATOR VALVE?? Anyone have any help into this? A 2009 would be a 4L80E equipped truck, not a TH400, so the trans is most likely in limp modethat can be for a host of reasons. This manual can be used in collusion with any type of scanner utilized in retrieving these codes from the computer. That gives me the same overall ratio in OD as a 4:56 in direct, which allows me to use the OD as a gear splitter which makes a HUGE difference in driveability with the trailer. R&r trans replace reaction shell and gear. Crazy coincidence is just last night while I was working, I was talking with another driver and he told me a story about a few trucks of his with 4L80E's in the past where he had lots of solenoid problems. The car runs like a million bucks, and 1st & 2nd gear are great! But I don't have a 2nd to 3rd shift. A bad shift solenoid. Shift Solenoid B Performance / Stuck Off. bought it dec 05 2006. Park, neutral, reverse are fine. Just replaced the trans (4L80E)with a GM serta. Manual 2nd can be selected at any vehicle speed, but will downshift into 2nd gear, only if vehicle speed is low enough not to over-rev the engine. These problems can often be traced to a leaking actuator feed limit (AFL) filter or end plug. Most of the time it is a stuck Torque Converter Clutch (TCC) solenoid, but this is not the only cause of this problem. When actually it goes in to 2nd. The 1st digit being the year, the 2nd digit being the body code, the 3rd being the internal gear-train. Some of today's transmissions use (PWM) pulse width modulated solenoids that are controlled by a duty cycle. This is a good gamble to repair the code without replacing the transmission and typically costs about $200 to $250. Though most automatic transmission diagnoses and repairs are beyond the scope of the home mechanic, you can diagnose some common issues without specialized tools or training. Now when I put the truck in "Drive" it doesn't always go into gear right away and revs and then "bangs" into first gear. It is an evolution of the Turbo-Hydramatic 700R4 , originally produced in 1982. Won't shift manually either. doc Page 5 of 12 5 Shift Solenoid A Performance NORMAL PATTERN 1-2-3-4 Shift Pattern 2-2-3-3 P0751 This DTC detects a Stuck Shift Solenoid by using incorrect Gear Ratios with the Commanded Gear. For the 2-piece case it is on a flat surface of the case just behind the rear of the pan. When your transmission "slips", it may show an RPM of 3500+ or take a long time to coast. Sediment and/or metal shavings at the bottom of transmission pan. second gear…. Or if it's a quick fix, I'd rather keep the 4l60e until the 4l80e is fully rebuilt. When I rev up, nothing happens. As you get into the low 10 second ¼ mile times, you may start to see some differences between a lightweight transmission and a heavier one. 95' 4L80E only got 2nd & reverse. 0 and a 4l80e transmission out of a 2005 chevey high output and dropt in my car and every thing runs fine but the transmission seamsto be stuck in 2nd gear iff eny one nows what the problem might be would apreaciat the info thank you. The car runs like a million bucks, and 1st & 2nd gear are great! But I don't have a 2nd to 3rd shift. Possibly reusing the same Transmission Fluid you need to drain out. 4L80E repeated solenoid B code 86 or 87, no 3rd or 4th gear, new springs for the 1-2 and 2-3 shift valves. my fluid is clean, no burn smell i drove home from the desert and the tranny was shifting perfectly fine ( this was on a saturday). 1st gear = 2. Do not confuse a slipping transmission with a solenoid problem. 3rd gear is the only forward gear in a 4L60E transmission that does not require electrical power. Seems sluggish and throws code P0756. net is the home of the Transmission Rebuilders Network offering the leading transmission rebuilder forum in the transmission industry. It will not upshift nor downshift it is stuck there where it w. Discover premium quality transmission parts with unmatched reliability, durability & value. 0 sec AND Commanded Gear = 4/ with TCC Locked. The bold section was the only reason I suggested the 4l80e, but the 700r4 would work also. there is a round plug on the drivers side of the transmission it controls the shift solenoids. Broken or detached shifting linkage will cause the problem. No 2nd or 4th gear. Check the wiring harness to the transmission case and make sure that it is plugged in. Fortunately and after much reading, I now have a new appreciation for and a smooth shifting 4L80E transmission. ) and P0752 (Shift solenoid A stuck on) Fluid and connections are fine. I replaced the alternator and the next morning the transmission would not shift out of 2nd gear when trying to move forward (park, reverse, neutral were fine). Transmission electrical diagnosis troubleshooting help on all your transmission problems or questions. How to 4L60E to 4L80E trans swap. 75 (TH400 has same ratios for gears 1 to 3). Since third gear has a 1:1 ratio, The planetary are not rotating relative to each other while the transmission is in third gear. If I pull it down to 1,2, or 3 it locks up. 4l80e stuck in 2nd gear - Answered by a verified GMC Mechanic We use cookies to give you the best possible experience on our website. Buy 4L80E 1-2 A Shift Solenoid and 2-3 B Shift Solenoid Set 1991 and up GM: Kick-Down Solenoids - Amazon. The second sensor is the turbine speed sensor in the main housing, and pics up off of either the PTO gear or a stamped steel tone ring that replaces the PTO gear in units without a PTO option. I Have a 1993 chevy crewcab 1 ton dually with the 4l80e i am having similar problems with mine i have 1st 2nd and reverse when i reset the computer as soon as it shifts into 2nd it no longer has 1st the drive gear is stuck in 2nd still have reverse and park have replaced the input and output sensors on driverside talked to some transshops and. Put it in drive and it feels like it's stuck in second. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. When I rev up, nothing happens. 95 Silverado 2500: wheel drive. The 4L60E and 4L65E are built at Toledo Transmission in Toledo, Ohio and have also been built at Romulus Transmission in Romulus, Michigan and Ramos Arizpe , Mexico. Other wise it coasted above engine rpms. A TH400 and 4L80E used in heavy towing will sometimes cause the rear bushing to "walk" to the rear, ruining the governor gear. EZ-TCU stuck in L2 gear selection. When 3rd is in, it's solid, but more often then not, when it's supposed to shift to 3rd from 2nd, it actually go's to first. Thats when it all started. P0752 - GM; Type: Powertrain - Transmission - ISO/SAE Controlled: Description: 1-2 Shift Solenoid - No 2nd or 3rd Gear (4T80 - E Transmission) Cause: DTC P0121, P0122, P0123, P0502, P0503, P0716, P0717, P1820, P1822, P1823, P1825, P1842, P1843, P1845 and P1847 not set, engine runtime over 5 seconds, Fuel Cutoff inactive, IMS indicates D1, D2, D3 or D4, TFT sensor input from 68°F-271°F. Chevrolet Impala Problems with Transmission Pressure Control Solenoid. Completely silent. A broken shifting for in the transmission can also cause the. I have a 1992 Chev C3500 Dually 7. It will not upshift nor downshift it is stuck there where it w. That gives me the same overall ratio in OD as a 4:56 in direct, which allows me to use the OD as a gear splitter which makes a HUGE difference in driveability with the trailer. Technician A says a problem with the circuit's accumulator will result in this condition. So I changed both shift Solenoids and changed the fluid in the pan, but no change any advise about what might be going on or how to fix would be greatly appreciated. it came apart and gm said they will rebuild it. P-R-N-D work, upshifts are erratic and occur at random engine speeds, will not upshift from first gear (no upshifts at all): This problem seems very serious in nature but in fact this is something very simple to fix. It's been shifting in and out of 3rd intermittently. I have a code 68, which is "transmission component slipping" and means the slip speed when TCC engaged has been greater than 200 rpm for 2 seconds or more. 3rd gear is the only forward gear in a 4L60E transmission that does not require electrical power. This early harness has a problem with leaking fluid at the pass-through connector. Pulling the 4l60e transmission on Austin's 1993 Chevy 1500 pickup truck - Duration: 7:41. Forgive my total ignorance in the field of automatic transmissions. Why is your M1151 4L80E transmission stuck in second gear? the tcm has a hard code stored and has gone into safe mode Why would the transmission hang in first and second gear on a 1988 GMC Rally. Buy ACDelco 24230298 GM Original Equipment Automatic Transmission 1-2 and 3-4 Shift Solenoid Valve: Hard Parts - Amazon. Just replaced the trans (4L80E)with a GM serta. Shift Solenoid B Performance / Stuck Off. Transmission runs only in 2nd gear. 56 and 37's should be about the same. Put it in drive and it feels like it's stuck in second. A 25% duty cycle means that the PWM solenoid is powered on 25% of the time and off 75%. bought it dec 05 2006. Undercuts behind the splines are reduced, resulting in increased spline length and diameter, increasing spline engagement at the forward clutch hub and rear internal gear interfaces. P0752 GMC Tech Notes When the a transmission solenoid is stuck on, in most cases the problem is not the electrical part of the solenoid; the problem is foreign material obstructing the mechanical function of the solenoid or the flow of the fluid through the transmission valve body. Remove & Replace. A4 4l60e Trans won't shift out of 1st gear. you can pull the servo assm and check it. Sudden grinding noise with no prior warning primarily in 2nd gear, behavior in reverse may be abnormal; sunshell is fractured. It's located in the valve body and can be changed without removing the trans. net is the home of the Transmission Rebuilders Network offering the leading transmission rebuilder forum in the transmission industry. I have a consistant shifting driveline clunk that only occurs when the transmission upshifts from 2nd to 3rd gear and then downshifts from 3rd to 2nd gear. Whether you need 4L80E wiring diagram information, 4L80E transmission rebuilders tips, 4L80E technical information, 4L80E diagnostics, 4L80E troubleshooting help, or just answers to your 4L80E transmission rebuilders question, the Transmission Rebuilders Network is the place to go!. Any 2008 Chevy Equinox P0752 Shift Solenoid A. SOURCE: automatic transmission is stuck in 2nd gear (limp mode) most newer vehicles have transmission control modules,that go to a default of 2nd or 3rd gear when they go bad! I had a 91 plymouth stuck in 3rd gear because of this module! could be your problem!. Re: 2000 Year, Chevrolet, C3500 4L80E Transmission? FatwingChris, Well when it is in fourth gear and it does go to fourth gear it kicks out and never goes into it again until I shut the truck off for a few seconds say 15 to 20 seconds then restart the truck and I have all my gears again until it does it again after a while. Some of today's transmissions use (PWM) pulse width modulated solenoids that are controlled by a duty cycle. /////Update////. Since third gear has a 1:1 ratio, The planetary are not rotating relative to each other while the transmission is in third gear. Completely silent. GMC 2002 1/2 ton pickup,transmission reverse went out at 44,000 miles (first time it went out at 28,000 miles). i will be taking them up on that new 100,000mile factory warranty. Transmission electrical diagnosis troubleshooting help on all your transmission problems or questions. The bold section was the only reason I suggested the 4l80e, but the 700r4 would work also. Pulling the 4l60e transmission on Austin's 1993 Chevy 1500 pickup truck - Duration: 7:41. When actually it goes in to 2nd. I had the car running fine and shifting fine. Forgive my total ignorance in the field of automatic transmissions. No 3rd or 4th gear: "3-4" clutches are worn out. Learn about this problem, why it occurs, and how to fix it. Park, neutral, reverse are fine. There are four things that can cause your problem. we've had an m1115 hmmwv in our. It's located in the valve body and can be changed without removing the trans. Mainshaft is manufactured from proprietary steel billet material. When I rev up, nothing happens. GM recommends upgrading to the newer connector and wiring harness. Learn what does P0756 Shift Solenoid 'B' Performance or Stuck Off means, location and how to repair? Shift solenoid valve 'B' is turned ON or OFF by the Transmission Control Module (TCM) in response to signals sent from the park/neutral position (PNP). A bad "B" solenoid will kill 3rd gear and OD. I own a 2003 Chevrolet Silverado extended cab short box z71 4x4 pick up truck. P-R-N-D work, upshifts are erratic and occur at random engine speeds, will not upshift from first gear (no upshifts at all): This problem seems very serious in nature but in fact this is something very simple to fix.