white1

iTrader: (5)

I got a 08 CC with a 4.8 Right now its basically stock (tune and longtubes, and a muffler) Im about to turn 6,000 miles, its been a little cooler than normal in the mornings, but I live in south Louisiana so thats about 40* when getting onto the on ramp on my way to work, I notice the 2-3 shift isnt firm, and it over revs a little. Ive fried my share (7+) 4l60e's and one FLT level 5 with the help of a small fluid leak and my 6.0, but I cant believe Ive smoked one on a pretty much stock 4.8 WTF is the deal. These transmissions SUCK. I did ask am ex-Chevy transmission tech and he said it wasnt uncommon while cold, but I still think thats BS. I figured Id have a new trans before 25k miles, but never figured before 10k

Truckshop

iTrader: (17)

put a good servo in it and the 2-3 shift will improve greatly.

circusboy

iTrader: (2)

mine held on till 40K or so. If i would have left it alone it would still be running fine, lol.

white1

iTrader: (5)

I kinda hate to void the transmission warranty. I still have 94k left on the warranty. I planned to get at least 3 before its out of warranty, but at this rate it looks like I may get 10 lol

Stoichiometric

iTrader: (10)

Will the tune cause any issues with the warranty?

white1

iTrader: (5)

Shouldnt

nighthawk08

it could.

litreddevil

iTrader: (4)

not if you put it back stock before you bring it in the shop

nighthawk08

the current computers have a memory of the last 10 cals loaded or something. they can check if it has been tuned or not. there was a thread about it a little while back. this is on the E67 and E38 pcms.

not to say you wont get away with it, but its possible for them to find out with the new PCMs.

white1

iTrader: (5)

Im not quite calling bs, but I have been told by a service advisor that is bs. When you re-flash the computer it's re-flashed so it doesn't store anything. If you do a re-wright it would over wright everything correct?