Torque converter lock up question/help
Thread Starter
Racer
Joined: Aug 2014
Posts: 478
Likes: 66
From: Elizabethtown, NC
Torque converter lock up question/help
Hello. I want to raise my torque converter lock up to lets say 50-55 mph in my 1990 l98 automatic trans. I remember seeing a memcal/chip manufacturer that you can buy that does this but I can't find it now. Can enbody help me with this. Thank you
Race Director
Joined: Apr 2003
Posts: 17,700
Likes: 1,667
From: moraga ca
When my car was on the street, I put a manual switch on the console and hit the switch when I wanted a 5th gear on the freeway. Just have to remember to deactivate the lock up when slowing down to a stop.
Thread Starter
Racer
Joined: Aug 2014
Posts: 478
Likes: 66
From: Elizabethtown, NC
Thank you for that. I was just wondering if someone could change the program to raise it. I could have swore I saw it somewhere it could be but maybe not.
Melting Slicks
Joined: Mar 2002
Posts: 2,876
Likes: 764
From: Sligo PA
OP I would talk to PCMforLess and see if they can help you out. They advertise on their site that they can program 86-93 C4's. But something to consider. There are aftermarket trans controllers that would allow you to tune your transmission however you wanted yourself. And some of these cost about the same as some tuners charge.
Le Mans Master
Joined: Sep 2013
Posts: 6,192
Likes: 750
From: near the thumb in the mitten
Unfortunately 700r4 transmission uses shift cable. 94+ uses 4l60e which is electronic shift. You probably also have a 2.59 base axle making TCC more irritating. I would suggest getting a custom men cal changing tcc engagement and other possible performance enhancements. Chevrolet did leave a little bit on the table in complying with regulations. PCM of NC is a popular tuner.
