Im not sure if this is the right place to post this but i will give it a shot. I have a 95 z28 with an lt1 and 4l60e tranny. I just purchased the car a few weeks ago and i think i got ripped off. It has a 2800 stahl converter. It shifts hard into second which i know can be normal, but when the car is warm if i put it to the floor it will not shift from 1st to 2nd it just red lines. As soon as i let off the gas it shifts. 85% throttle everything is great but as soon as i hammer on it it does that and will slip the higher gears. I really would like to do a t56 conversion but havent found the right package. Can anyone help me out??
What could be wrong?
Where i can buy a conversion?
Where i can get a reputable performance built 4l60e?

Thanks

 

I'd take it to a couple different transmission shops to get opinions / inspections..

D&D performance might have a conversion set up..
I'd do a search on the Conversion... My brother did it to his Iroc. T56 put in place of his 700R4

 

Best place for this it the "Drivetrain" forum..... I'll move it there.

 

Do a search for "stall wall". Most things I've read say it isn't a problem until 3000 stall converters but your symptoms sound like that's what it is.

 

As mentioned above, it might just be in the tune. I would check that out first before spending money you might not have to.

 

Yes I would certainly verify the comand for the shift is being given first. With a stall generally above 3000 but with higher ratio cars can be lower you can get into a situation where while the trans is fine the PCM is confused by the stall converter slip.

 

hello guys im having the same issue with my trans out of no where trans started this issue,just alittle history on the auto trans had it rebuild 2yr ago with 20k miles now never had a problem till two weeks ago,its got a 2k or 2,200 stall ,honestly i dont know what to do but just replace it with a GM Trans ,any suggestions .thanks

 

If you have a performance car then you need a trans built for performance use by people who are familiar with them and know the ins and outs.