Hi, i

 

Your TC is locking up, disconnect the plug on the side of the transmission and repeat the scenario. Let me know?

 

Thanks

 

Hi, pro-built

 

Electronics is not my strong point, you will need to find someone on the board who done this or who can do the modifications you desire/need to solve this.

 

Thanks Pro-built ,
I

 

Yes you can change the lockup point in the prom. I also have a GTA (91) with a performance trans in it. I have moved the lock up point in mine and it seems to be doing fine. The complaint I have is the fact the lock up does not unlock at the comanded speed unit I throttle it up or hit the brakes. This makes the car lugg coming out of the corners unless I mash the gas or down shift. The owner of the rebuild shop went for a ride and said this was normal and they did this to save wear and tear on the tranny. How can they dictate this when I set the speed at which the solenoid activates?

 

Yeah, the PROM controls all of the TCC lockup stuff.

GTA - hop on over to the DIY PROM board and take a look around. the stuff to tweak your own PROM isn't too expensive, and you will have FULL control over what your TCC does.

A few examples:

(1) stock, the TCC is forced to lock at any speed above 75mph (I assume this is 130 km/hr). I flat out disable this. It's BAD because it forces the converter to lock, even at WOT, which is hard on the locking mechanisms in the torque converter.
(2) there are four tables in the PROM that control what speeds lockup/unlock occurs, based on throttle position. You can alter these tables so that you can lock up the converter earlier or later for any throttle position. For example I have my torque converter lockup effectively disabled for throttle position greater than 72%. Why? To avoid tearing up the converter, and to gain the torque muliplication advantage. You can also control where the lockup occurs at light throttle - I raised this slightly to avoid bogging the engine at really light throttle.
(3) you can disable the TCC unlock when decellerating (no gas), so that you can use engine compression braking.

Tailoring the prom to fit the personality of your converter is WELL worth it.

 

Thanks folks,

 

nah, you won't hurt the converter.

take a look at the "stickys" on the DIY PROM board, read traxion's introductions to burning, read the archives, and so on and so forth to get yourself up to speed. there is a TON of information just in the archives alone.

all ya need to get started is a memcal-prom adapter from craig moates, a pocket programmer, and tunercat with the $8D definition file, and you can tune and tinker away until your hearts content!