KJ2THEMAX

94 GXE. I had the tranny and torque converter rebuilt less than a year ago and now my tranny is doing something pretty strange. At cruising speeds of about 35-50 mph after having coasted, the tranny seems to take a few seconds catching the gear when depressing the accellerator. Also during steady accelleration from a stop, the tranny seems to similarly slip when going from 3rd to 4th gear. Any insight as to what my problem may be would be helpful. Thanks a lot.

hoodank178

It sounds like the tranny is going again.Third gens are notorious for this crap.Hopefully you got some sort of warranty with the rebuild because unless your s/c'd or turboed or drive like a bat outta hell it should have held up longer.Sorry man I hope Im wrong.

KJ2THEMAX

bump

nismax1994

You probably know this but just in case: when coasting 35-50 mph the tranny unlocks the t/c and rides in 4th gear. When you step on the gas you've gotta really spin the t/c or downshift to 3rd to feel anything happen. One thing that happens going from 3rd to 4th, is if you have the o/d off as you accelerate then you switch the o/d on the torque converter will unlock before the shift and you will gain ~200 rpm before shifting into 4th. Both events could be disturbing if you are used to a manual.

KJ2THEMAX

Nah, I've never had a 5 speed. But you're talking about the converter clutch that our auto's have. If you're coasting in 4th gear (OD) and depress the accelerator, the engine will momentarily shift out of OD to get the revs back up a little higher then shifts back into OD....its a means of saving gas. this is what the guy who rebuilt my tranny and tc last year told me. It did this all the time and I was used to that, but what it is doing now is different. There is no feeling of a "shift" or a sudden jump in rpm's. It is more of a gradual rise in rpms after I depress the accelerator. I think there may be something wrong with that converter clutch. I hope that's all it is. Checked the tranny fluid...its fine.

eric93SE

iTrader: (1)

[QUOTE]Originally posted by KJ2THEMAX
[BQUOTE

Change the tranny fluid. Do a couple drain and fills.

chchmax

get the tranny flushed, its the best way to ensure it's cleaned out.
Mine was slipping a bit when the T/C lockup kicked in or out, so i took mine in to get flushed, and they found metal shavings in the bottom. Ended up with a total rebuild and overhaul. $2100 NZD worth of repairs, but i had mechanical insurance, so cost me nothing.

Hopefully yours isn't this bad. Good luck.

Uncle Pete

iTrader: (1)

You could possibly have a problem with the friction band servo piston.

The third to fourth gear change involves compression of the friction band to hold the main drum still. This is achieved by applying pressure to the friction band servo mounted on the side of the transmission.

Slippage in the third to fourth change is usually indicative of problems with the friction band. Another test is to cruise at fifty with the overdrive OFF and then nail the throttle. The tranny should kick down to second under full engine power. If the engine races but the car doesn't go anywhere fast then it definitely has band problems.

As you've had a recent rebuild it is possible that the band was replaced but the piston inside the band servo could be scratched or worn. It isn't universally replaced in all rebuilds, and it may not have needed it at the time. As the band servo can be removed without removing the tranny it shouldn't cost much at all to get it looked at.

KJ2THEMAX

Thanks for the info. I'll definitely have to get that checked out. It would be a nice gift if that is my only problem.