from a dead stop ? could it be an open diff and your spinning on one side and the other your not?

 

im guessing its pulling timing, dose it feel good up top? and if its shifting all around you can usually tell.

 

It has a locker under it.

Pulls good after it get going. Shift are fine.

 

well we need alittle more info, when did all this start after you changed something? or just one day while you were driving?

 

You really need a LIVE Tune. I bet your tune is Def. on the conservative side.

No Knock on the tuner, but mail order tunes are usually on the safe side.

Get a Live tune and i bet she comes to life.

 

Would be nice to get a live tune but no one around here that dose them. Did some testing with it yesterday and looks like it will do it if the truck sets off for 30-40min. Much longer than that and it is fine or if driving you just stop and get after it it is fine.

 

I would drive somewhere and have it done, its worth it and the power you gain just mike make your towing abilities better!!

PM me if i can help ya!

 

Sounds like a heat issue to me, possible inter-cooler coolant getting hot after the first pull and not cooling down quick enough before you do another run, you can probably pop the hood after a hard one and see if the fluid is boiling... Do you have anyway to monitor air temperatures after the blower?

 

No and just how do you do that?

 

Lightnings have a IAT sensor under the intercooler to monitor intercool efficiency post blower. I would think you could/should do the same on the chevys