GMC5.3

iTrader: (2)

To begin car is just auto(3.23 gear) bolt-on with a loose 3600 stall, future mods will most likely be head & cam till I can make some real power with forced induction.

Most people here are really roll racers and hardly dig, just looking for opinions on if 3.90's would be a good choice with a shift kit hd2? Or go with 3.73's?.

Also just a random question, how bad is it on your tranny to manually shift an auto when roll racing? Being that my stall is so loose, stepping on the gas isn't cutting it.

GMC5.3

iTrader: (2)

Anybody ???

BODUKE

I think they will be good for roll racing.

murphinator

iTrader: (2)

what speed do people typically roll race from in your area ?

once you answer that then ask yourself what rear gear will put you at optimum start rpm in the transmission gear you plan to be in at that speed ... in any street drag race if you pull hard on someone on the hit chances of them making a mistake trying to catch you are good lol

GMC5.3

iTrader: (2)

True, mph ranges from 15 - 30, I always end up manually shifting my auto, don't know if that's good or bad

Guitar

iTrader: (9)

We usually do 40-50 rolls here...40 I COULD be in first but basically have to shift right away, 50 in second is perfect. I run out of gear towards about 130, which is usually plenty, but that's the only downside. I'm an M6 however.

GMC5.3

iTrader: (2)

Yeah I have a buddy who just got 4.10s and a first gear roll race is almost useless to him, I just don't wanna make the same mistake