#3303, "RE: just turboed, now not shifting" In response to In response to 0 Sep-18-04 01:52 PM by madhatter210
TCA transaxle control module could be bad? Also did you re-use your torque converter?It's just a thought...maybe could of been your first trannys problem if it was bad or going bad.Also I figured I'd ask if you re-used the torque converter from the old tranny because I know it's sometimes extra to buy it from the yard and it has been known to re use the old one to save 50 bucks.If you and your bro did it might be the issue.Just my thoughts to help out ....don't overlook the obvious though fluid level and filter.
A transmission control module (TCM) provides fully adaptive electronic control of all shifting. Shifts are very smooth because the electronic control senses input and output speed changes as shifts occur and adjusts hydraulic pressure accordingly. Adaptive electronic control provides up shifts and down shifts with a smoothness unattainable with strictly hydraulic transmissions. In so doing, adaptive control makes the power train feel responsive without harshness. These controls inherently compensate for changes in engine torque or friction element characteristics to provide consistently smooth shifts for the life of the transmission.
The TCM considers operating conditions such as ambient and transmission temperature, engine loading changes caused by climbing grades, loss of engine power at high altitude due to lower air density, and engagement of automatic speed control in determining when shifts should occur. On up-grades, "anti-cycling" logic assures that down shifts do not occur cyclically. After a down shift to Third occurs, the TCM determines the torque required to maintain the existing speed and/or acceleration level and only allows an up shift if the same torque level is available in Fourth gear. When speed control is engaged, down shifts on up-grades occur somewhat earlier than with driver control of the throttle to assure that speed is maintained.
Engagement of overdrive (Fourth gear) is controlled by a push button on the side of the shifter. When the switch is in the OFF position, the transaxle will not shift to overdrive and an O/D OFF light in the instrument cluster is illuminated. Having overdrive off makes driving smoother in traffic at low and moderate speeds where overdrive is not needed. With overdrive off, upshifts to Third gear occur at the same speed as in overdrive.
