SincalT/A

iTrader: (16)

I really think you will have no problem getting 12's with 4.56's.Trap speed will so most improvement for sire.I would say 4-5 mph easy imo.

SincalT/A

iTrader: (16)

Ooo Your converter will tighten up bout 300-400 rpms too.

Bumpers

iTrader: (10)

I say do it.. If it will get you more into your power at the traps then it has to improve.. Also drives a lot better from stoplight to stoplight less pedal to get it moving. Tires may suffer some though

MPFD

iTrader: (5)

What do you cross the traps at now?

BlackGMC

iTrader: (31)

kinda hard to tell by logs but roughly 100 @ 5400-5500rpm..

MPFD

iTrader: (5)

Take your mph off the slip and plug it into here: http://www.race-cars.net/calculators...alculator.html

Bumpers

iTrader: (10)

if thats right i would def step up to some 4.56 if your truck pulls all the way to 6700...should put you crossing the beams about 3/4 of the way into your power.... i think it would pick it up quiet a bit

MPFD

iTrader: (5)

I run a 255/70/16 (30") street tire and it runs 2500 rpm @ 70 mph, it's not DD, but it gets driven alot . 28"x10.5" Hoosier slicks @ the track... Best so far is 113 mph in a 4000ft. DA. Can't wait for temps to cool off and DA's to lower this fall to see how much it picks up. With the old 3.73 gear it made 19-20 on the highway, I'm sure its down alittle now.

BlackGMC

iTrader: (31)

Looking at a log the 2->3 shift goes from 6800 to 5000

ap2002

iTrader: (8)

Do it!! I really think its going to help u out a lot