oakley6575

iTrader: (3)

I'm going to hook up a simple rocker switch to my 4L80e torque converter. I'm sick of it never locking on the freeway. What wire would I run the switch to? TCC SOL CTRL or the TCC PWM CTRL?

Thanks guys!

midevil1

iTrader: (17)

Not that simple with Chevy and the 80E. If you want it to lock on the freeway, then get it tuned to stay locked at anything under 30% throttle. I just set all my pid's in Cruise from 0 to 30% to 256mph and you have a constant lock up with no heat issue's. Normal Drive mode I set them to anything under 20% throttle.

Gm
uses PWM.

oakley6575

iTrader: (3)

I have tuned the TCC for countless hours and it doesn't respond to anything but extra load. It will lock when going up a hill, but once I reach the crest, it unlocks and stays unlocked until load is added again. It doesn't make any sense to me.

oakley6575

iTrader: (3)

I think I will cut the PWM wire from the computer and add the rocker switch to it. I will delete all the DTC's so it doesn't lock out fourth gear and see how the computer handles it.

slow67

iTrader: (2)

4L80Es don't have a control solenoid, only PWM.

oakley6575

iTrader: (3)

Thanks Slow

midevil1

iTrader: (17)

If you use HPT. I can send you my tune..

oakley6575

iTrader: (3)

Yea that would be great. You can just post it up right here if you want. I don't have my HPT software with me right now. But I can check it out when I get my tuning computer back. Or you can post some screen shots of the tcc tables. Up to you. THanks

midevil1

iTrader: (17)

Ok, I will get something to you on Monday.

oakley6575

iTrader: (3)

midevil1

iTrader: (17)

I attached my current tune. I am a builder so try it with confidence...