I've got a 02 sierra w/5.3, Gen 2 fipk,TT3000,Transgo shift kit and a Wester's tune. After I installed the verter and shift kit (before the tune)I noticed the truck would fall on it's face after the1-2 shift and to a lesser degree after the2-3 shift. I understood this to be a normal situation due to TM. Now I've got my tune and while it's much better, there is still a "lag" after the shifts. Lyndon says it could be my tranny failing to release from first before shifting to second. What do you guys think? My gut says it's still pulling timing. How can I determine the cause? I know someone is gonna say I should have got a nelson tune, but I got what I got(GP from TByrne). I have no logging software so I need a alternate method of determining whats going on if possible. Thanks.

 

Failed to mention I've got the Superior 1-2 servo installed.

 

Did they remove all the torque management with your tune?

 

its definetly the PCM... Lyndon doesnt pull as much TM as say Nelson or other tuners who would be able to do a Live tune. Did you let him know you had the yank in?

 

Yes I told him about the yank and he says he pulled all of the TM out. I wonder. Live tune would be tough since I'm in Oklahoma. Farmtruc if youre out there what do you think?

 

Letsroll, their is a tuner in Oklahoma. Don't know his name but I am still going to go with Allen when I get my tune.

 

san antonio isnt to far from oklahoma... i'll be driving from indiana and stopping in san antonio on my way to arizona.. for a nelson tune...

 

I dont think it is your tune. I think I have the same stutter you are refering too but mine only does it occasionally. I also have a TT3000 on a stock tranny with transgo/vette servo. I tuned mine my self and have made numerous logs so I know all tqm is gone and I see no timing drop on the shifts. BTW.. mine ony does it at part throttle. WOT shifts are quick and crisp.

 

It is abuse modes and TQM. Mine did it as well until I removed them all.

Your tranny is fine. It feels like it stumbles, then out of no where it FEELS like you just give it more gas. The one I hated is when it would switch back and forth.

The PCM thinks the tranny is slipping so it pulls timing to let it catch back up, when it realizes it isn't catching up or has met the requirements, it will restore timing.

 

I think the guy in OK is Ed Wright.