Brand new 4l60-e for a 95 lt1, pro-built and has less then 10,000 miles.

Tranny cooler
Amsoil racing fluid
2800 stall WITH the tranny (already bolted on)

Ran perfect before cam and engine swap. As soon as i got the engine swap done and put the tranny on (we left the tranny alone, never removed anything) went for a test drive and now it slips almost all the time.

You put it in drive and you can't even feel it engage like it did before. Reverse feels great, nothing wrong there. ALL done by professional shop i know well and saw 90% of all work done.

It slips when you give 50% throttle until you feel the torque converter lock . . then its nice and strong untill about 5K RPM, then it completely slips outa gear untill you let it idle for a few seconds. Anytime you give it 100% throttle it slips alot then slips out completely.

Computer was RE-tuned and checked if it was pcm. Tune is by Madz28.

Everything looks connected. Engine has TONs of power when i can get it to go. Again worked PERFECT before engine swap, tranny is full and good color.

Thanks for the help!

 

If this one of my units, please give me a call asap, (even on Sunday, after 12 noon PST) and I will take care of this?

 

Sounds like your forward piston is cracked.

Frank
CPT

 

is there a way you can tell its that piston if i hook the datamaster program up to my car? like line pressures or something?
I'm going to see what i can find out today with the laptop.