Chevy Express Van Transmission Recall
I would think some Class C and many Class B owners would be affected by this. I'm trying to guess what the fix is going to do to the performance, MPG, etc. It does not say "recall", but the Chevy se...
Forum Discussion
BenK wrote:
With the natural 15% or higher slippage of an TC and that subsequent
torque multiplication...this is all funneled through the food chain
down to the tires
Yes and no. There is 10%-15% slippage in the converter when it is unlocked. This bulletin refers to the torque converter clutch. When the clutch is applied there should be ZERO slippage. Apparently there is more than zero slippage, and that is causing excessive wear. An unlocked converter causes exactly zero wear to the torque converter clutch.
BenK wrote:
The re-program will reduce the amount of power allowed. So performance
will be degraded
Why would you make this assumption? Maybe they are reducing power, but it makes more sense to me that they are reprogramming it to unlock the converter where the converter clutch would be overloaded. That would solve the problem with much less customer dissatisfaction than by reducing power.
Also, if the problem exists at part throttle, then reducing power does almost nothing to solve the problem. People drive by speed, not by power output. If they want to maintain a given speed they press the go pedal far enough to maintain that speed. If part throttle power is reduced they just push the pedal a bit further to maintain that speed. Then the load on the converter clutch is still too high and wear will be unacceptable. Unlocking the converter is the only solution that makes sense to fix this issue.
