new differential

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01-07-2007, 06:18 PM

awormofearth

Thread Starter

Join Date: Jan 2007

Posts: 27

new differential

Hey, is there a calculator to tell me what RPMs i'll be doing in which gears at what speeds, etc, with higher differentials? With a 91 GT, I wanted to know if 4.56s would be too much. I've heard that the 4.10s are a popular differential to use. Does the 4.56 ruin your hwy mpg? ...would you still have traction in 1st?

thanks

01-07-2007, 06:22 PM

white93pony

3rd Gear Member

Join Date: Jun 2006

Location: oklahoma

Posts: 643

RE: new differential

yes it will kill hwy mileage traction with slicks only are you gonna drive it daily go wit 3.73 or 4.10

01-07-2007, 06:30 PM

ModularFox

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Join Date: Sep 2006

Location:

Posts: 1,227

RE: new differential

4.56s would be really bad idea youd deffinatly be out of gear by the end of the track. on slicks with my 4.10s first gear i still blow my tires off.

01-07-2007, 06:42 PM

AdderMk2

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Join Date: Dec 2005

Location: Lil' Rhody

Posts: 22,376

RE: new differential

Quote:

ORIGINAL: awormofearth

Hey, is there a calculator to tell me what RPMs i'll be doing in which gears at what speeds, etc, with higher differentials? With a 91 GT, I wanted to know if 4.56s would be too much. I've heard that the 4.10s are a popular differential to use. Does the 4.56 ruin your hwy mpg? ...would you still have traction in 1st?

thanks

your worried about traction in 1st gear.... you wont even HAVE a first gear... you'll be at 6000 rpms the second you hit the gas.