What causes a harsh shift into second gear on an AODE?
On the AODE, and 4R70W a harsh shift into second gear is usually caused by a broken lower 1-2 accumulator spring. There are other possibilities, but the broken lower accumulator spring is the most likely one.
Why is the reverse gear not working on my AODE?
My AODE (or 4R70W) has lost reverse but all other gears work fine, could this be an electrical problem? Unfortunately this would have to be a mechanical problem. There is nothing electrical about reverse gear in the AODE or 4R70W transmissions. You could have a bad Low/Reverse Band, or a bad Reverse clutch pack.
What to do when 2.1-2 shift does not happen?
2. 1-2 shift does not happen at WOT (Wide Open Throttle) until you let off the gas: Best case: try replacing the TPS. Middle case: leak in the 2nd gear apply circuit (servo assembly or 1-2 accumulator). Double check by using the pressure gauge and watch for a big drop when the PCM commands 2nd gear.
Why does my transmission shift hard from 1st to 2nd gear?
The fluid gets dirty over time and when it does, it causes plenty of troubles. Hard shifting is one of them. If the color is dark brown or burnt, changing it is likely to solve this issue. Dirty transmission fluid. (Photo Source: procarreviews)
Why is it hard to shift into first and reverse?
Hard, and sometimes impossible shifting into first and reverse is caused by the clutch disc not moving away from the spinning flywheel. This is commonly referred to as the “clutch is not releasing”.
Is it hard to shift into 1st gear?
My 1997 E36 M3 has recently developed an annoying/troubling problem. It’s sometimes difficult to shift into reverse, 1st or 2nd gear. This has been going on for a while but recently it’s gotten much worse.
What happens if there is no 2nd or 4th gear?
No 2nd or 4th gear. 2-4 band is slipping: Servo seals may be damaged. Otherwise, 2-4 band is worn out. Transmission must be removed and rebuilt. 10. Trans shifts into gear harshly, car feels sluggish off the line, No 1st, 4th or TCC lockup available, Manual 2nd, 3rd and Reverse are only available gears, CEL is on:
Why do I have no reverse and first Gears?
This is symptomatic of a failing layshaft bearing (although I would try everything else first before tearing into the box). The largest bearing is at the end where reverse, first, and second gears are. When that bearing comes completely apart, you are left with no reverse, first, or second gear. DAMHIK. Good call CR!