BabyGrey03GT

Okay while I do realize I have a 2 Valve GT that doesn't like to "spin" as some of you put it... would 4.30's be okay for my car ..or should I go 4.10's? I don't have a Mach YET.. (soon) but I am posting here because you guys seem toknow about rpm's for the 4 Valves and the 2 Valves. Thank you for your time.

timmyisevil

4.30's in a gt is like a timebomb in your engine

99shadowGT

i have 4.30's in my GT and they are fine.at around 75+ the rpms are a littlehigh around 2800, but otherthan that they are great!

timmyisevil

NOT FOR THE OVERALL LIFE OF THE ENGINE. hope you dont have high miles. and iam talking from personal experiance.

Stone629

Better stick with 4:10s.

SINISTER

The 4.30's are great man. Car is a lot more fun to drive now, especially since I don't have the money to burn on serious power mods. Did the install myself and it was a breeze. As a plus, I don't cruise on the highway too fast anymore in order to keep the RPMs down.

blk03mach1

4.10s really wake up a gt 4.30s will bo too much unless its just a track tool highway rpms will be killer

blk03mach1

4.10s really wake up a gt 4.30s will bo too much unless its just a track tool highway rpms will be killer

mustangman02232

just like with4.10s the people who actually have them never complain

t45 or t3650?

blk03mach1

true to each his own i have 4.10s and love them my buddies gt has 4.10s he loves them but highway travel is a big part of getting around. the switch from 3.55 to 4.10 felt great need to drive a mach with 4.30s 3650trans thinking about t56 swap