Thread: disable lockup 1999 regal gs

There are ways to do this but without a tuner you are going to throw trouble codes and some of them will cause the trans to go into limp mode and have max line pressure. Why would you want to dissable TCC?

What are you talking about????



Above is the ONLY connector that goes inside a 4T65E and clearly if you disconnect this you lose everything, and it WILL throw codes, OBD2 systems throw codes for ANY transmission electrical problem. If the TCC switch in the transmission doesnt switch when the solenoid is commanded a code throws. If the solenoid isnt hooked up a voltage or short to ground code throws. When TCC slippage is over 250rpm for a certain time when commanded a code throws.

Originally Posted by 19SE92

To the orginaly poster. If you have no tuner there is a plug in the front of the trans near the top of the case on the side were the exhaust cross over is it should be a round plug plugging into the trans pull it and lock up is shut down and no codes will be tripped. Because tkere will be no power going to the tcc switch.

I REALLY try to be patient with people, particularly in this kind of environment where you have the multitude of backgrounds, personalities and so forth. And I try to play nice. I even try to put myself in the other persons shoes hoping to see things from a perspective I may give little consideration to.

But dude, Ive tried to look at it from different angles trying to figure out WHY in the world you would tell someone to disconnect the ONLY electrical plug to an ELECTRONICALLY controlled transmission. A transmission that DEPENDS on signals from the pcm to work properly as a complete system, not just TCC Lockup.

I dont know exactly what thought process you used, but it was a run away train that derailed in a metropolitan area and I certainly would appreciate if you would give serious thought to what you are about to post with respect to such advice.

I'll stop there because I am just about to boil over and I prefer to refrain from making you target practice.

Originally Posted by smokingjoe

i have a shift kit and trans interceptor to increase line pressure, and when ever it goes in to lockup there is an annoying jarring type shudder, but i am very pleased with the rest of the shifts.

i am not worried about gas mileage.
thanks trannyman in advance

Joe Gancos

This is auctually quite common from what I have heard. My tranny did it to me when I started changing stuff, increasing line pressure, shift kit, etc. But I solved it by changing the shift points, and lock up points in my trans. And it does not do it anymore.

But I must caution you. Making your tranny not go into lockup can be very bad for your tranny. If you drive like this for any amount of time, your tranny temps will increase A LOT and it will not shift right. On top of this, the increased heat generated can cause the fluid to degrade at an increased rate and cause permanent damage to your transmission. This can happen just if you are driving it easy and not even beating on it. Just think what would happen if you start to drive aggressively. For these reasons, this kind of change is not recommended by anyone.

What Zef said is 100% correct. If it is all in town driving then its not really going to make much of a difference, but highway driving is not going to be that good on the trans or fluid as locking up the converter gets rid of the converter slippage which creates heat, not to mention the few mpg you will lose. Out of curiousity have you tried unplugging the Intercepter yet???? I would try that. I have one here that the output transistor that controls the lockup solenoid was burned up and I can see that causing a lot of grief on the circuit and possibly causing what you have going on. Also there is a delay control for TCC in that box, have you tried adjusting that?

Originally Posted by 19SE92

To the orginaly poster. If you have no tuner there is a plug in the front of the trans near the top of the case on the side were the exhaust cross over is it should be a round plug plugging into the trans pull it and lock up is shut down and no codes will be tripped. Because tkere will be no power going to the tcc switch. thats the cheap way to do it if your in a fix...

lol, are you serious?

Originally Posted by 19SE92

To the orginaly poster. If you have no tuner there is a plug in the front of the trans near the top of the case on the side were the exhaust cross over is it should be a round plug plugging into the trans pull it and lock up is shut down and no codes will be tripped. Because tkere will be no power going to the tcc switch. thats the cheap way to do it if your in a fix...

FWIW, I kinda think I know where he is getting this info from. On my 440-T4, which was NOT electrically controlled, but rather vacuum controlled, I could pull the wiring plug on the front of the trans and disable lockup without any problems. So if his name is correct, he may be able to do the same on his 1992. But there is no way you can do this on a 97+ GP.

Originally Posted by Toasty

that's what we're getting at. the topic clearly states the op has a 99 MY. 99 MY GS=L67=4T65E-HD --- these are facts. and immediately he says unplug the connector and it will do what you want. obviously he doesnt really have any clue about these transmissions. It'd be one thing if he asks if it has a separate electrical plug, or asks specifically which trans it is...


i'm sure he knows stuff about the gen 1 cars. that's fine. but to assume that one knows about all transmissions in these late model W body cars too... sorry, charlie. do your homework.

You and I understand this. But it was never stated. So for the sake of someone coming in here and seeing up tearing apart this guy, I was giving the reason. For others benefit, not your toasty.

Originally Posted by smokingjoe

the pot for adjustment is still there.

they are calling it all sorts of things and hiding it all sorts of places now days aren't they






Sorry, didnt mean to hijack your thread but I couldnt resist.