Hi, I have a very urgent question for u
I have a 92 GTA with the 700-r4 and a
(B@M shift improver kit ) yuck I did not know better at the time, it shifts great all the time except for tonite, all shifts happen at
42-4400 rpm full throttle upshifts except
my 3-4 happens at 160 km which is fine but now it will search between 4-3 untill it passes beyond 180km and then it will stay in 4th untill it will pull no more. please help
all replies welcome thanks, Worried GTA....

 

One more thing the trans NEVER searched before and can i remove the kit or is the valve body damaged after the install ??
I seem to recall a drill bit in the box,
and no i had the gm dealer install it, i'm
thinking of taking her in on monday morn
to pull the pan change the oil and filter
what do you trans guys think?? GTA.....

 

Let me clarify something, it won't shift until 42-4400 RPM right? If it didn't do this before but it does now, first check the TV cable to see if it is stuck/broke/disconnected. If it appears OK, then do this: To adjust the TV Cable skip the book method and do this: Press the D button on the adjuster and loosen the cable setting. Now, have someone floor the gas pedal while you check to see if the throttle plate is open all the way. Usually they are off a little and will wiggle. Do whatever you have to do to get it open solid. Now, with the pedal floored, press the D button and pull the cable casing (the black tube) back as hard as you can and release the button. You now have the engine, tranny and gas pedal all in sync at WOT. Mark the cable so if for some reason it gets moved you can know where to put it again. The problem with the 'self adjust method' is that it bends things and puts them permanently out of whack. It is also the full TV setting, which is theoretically what the GM method does.
If that does not help then the Throttle Valve is stuck (common problem in 700's- one of the main causes of failure).

The best thing to do is to install a TransGo Reprogramming Kit if you are after HP/HD use. It will not shift 'hard' all of the time, just when you poor it on but it will fix the sticky valve and help to keep the tranny alive if it isn't too late.

 

Thank you transfixleo!
I will check this out this morning,
any one else any ideas as well??
As well can the Throttle Valve be unstuck?
and with just a shift improver kit why was
I able to have access to wot in 4th in the
first place, friend has a 91 GTA and no
wot in 4th??
ps. i just tried the run this morning and it shifted fine (no searching) i hope nothing is
broke, ProBuilt any ideas as well? As i respect both of your opinions Thanks!! GTA...

 

My IROC does the same thing, and it turned out to be the clutchs and bands coming apart inside, needing a complete rebuild.