CurtD

iTrader: (7)

I have a 4l80 with a yank converter, the converter doesn't unlock when I tap the brakes. When everything was in the other truck it would unlock. The brake lights are working if that matters. Any ideas as to why?

charcold-bowtie

iTrader: (10)

Have you logged it to try to see whats going on?

There was a thread a long time ago, and people couldnt keep the TC locked, (they wanted to) so thats def weird

CurtD

iTrader: (7)

No haven't logged it for that. It locks up...but it's supposed to unlock when you apply the brakes and it doesn't. I think we're going to do some tuning Saturday..maybe we'll find something.

2004SSS

iTrader: (25)

somethings up , mine unlocks when i let off the gas afaik the segment swap trucks do this.

smokeshow

iTrader: (16)

Maybe its a manual transmission...

TurboGibbs

iTrader: (6)

Easy, easy... Curt's dementia comes and goes but I KNOW he wouldn't be trying to drive a manual.

quicksilverado

iTrader: (8)

They normally unlock when you let off the gas Curt.

Vince B

iTrader: (1)

Curt have you installed your scanner to see if the tcc is being commanded to off? If not it is tunning related and not in the trans. Being that it all worked great in your old truck I would suspect that there is an issue in the new one. Maybe a short to ground on the LU signal wire. IIRC the solenoid in the trans is hot all the time and is controlled by a ground signal wire. Hope this helps. BTW my exhaust shop shirt has holes in it. Might have to try to get a new one! Take care. Vince

CurtD

iTrader: (7)

Ok, I'll get the tuner to check it out ,Thanks.

You're gonna have to fix that shirt...the guy that bought my shop hasn't had any made