How do I know if my 4L80 is bad?
How do I know if my 4L80 is bad?
3 Early Signs Of A Bad 4L80E Transmission
- Burning Smell. Generally, the burning smell in your car indicates that you are driving the clutch, which means that you are partially keeping it engaged when driving.
- Transmission fluid leaks.
- Shifting gear problem.
- Final note.
Are there any problems with my 4L80E engine?
The following is a list of problems and possible solutions, should your 4L80E suddenly start to give you trouble. 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.
Where is the Transmission Control Module on a 4L80E?
The 4L80E Transmission system is equipped with a computer called the Transmission Control Module (TCM), located in the left/rear passenger seat compartment which interprets, ana-lyzes and records electronic signals from sensors and switches located on the engine, brake pedal, and transmission.
Why does my 4L80E go into limp mode?
If the 4L80E is only working in second gear and reverse, then it has gone into limp mode. It does this to protect itself from further damage when it believes that there is a potentially fatal error. It is really meant to get you to a safe place and have it looked at.
Is the TH-400 4L80E a good transmission?
The 4L80E, an electronic, overdrive-equipped version of the venerable TH-400, is tough enough to handle just about whatever hell you put it through when built properly. But while the 4L80E is a strong, heavy-duty transmission, during the first few years of production the 4L80E was not as durable as its design permitted due mainly to faulty parts.
Is a 4L60E interchangeable with a 4L80E?
FYI – 4L60E & 4L80E transmissions are NOT directly interchangeable. The wiring pinout of the trans plug is different, and 2 VSS’s are used versus 1 on the 4L60E. Besides the wiring difference, the ECM also requires a segment swap as that portion of the transmission control is completely different.
Where can you find a 4L80E transmission?
You can find the 4L80E transmission in ’91-and-later heavy-duty Chevrolet and GMC trucks and SUVs that use big-block, diesel, or LS-based engines that are 6.0L and larger. 4L80E Transmission Specifications. The 4L80 nomenclature denotes that the transmission is a 4-Speed, Longitudinally mounted, and for 8000 lbs. vehicle weights. It’s RPO code is “MT1” and has been domestically manufactured in GM’s Ypsilanti and Willow Run plants.
What are the symptoms of a bad transmission solenoid?
Another common symptom of a problem with the downshift solenoid is a vehicle that experiences late downshifting. If the downshift solenoid fails or has an issue, the vehicle may experience late shifting when slowing down. The transmission may stay engaged in a higher gear for an extended period of time when it should be downshifting.
What causes a transmission not to shift?
A lack of fluid or dirty fluid would cause the transmission not to shift properly. We recommend checking for transmission fluid loss, and using BlueDevil Transmission Sealer if the system is low. If the fluid looks dirty, you may want to have a transmission system flush performed and refill it with clean fluid.
