Rear Gears/LT4

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Sep 20, 2001 | 05:38 PM

thedevl

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Racer

Joined: Aug 2000

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From: Huntington Beach CA

Rear Gears/LT4

What are the rear gears in an LT4? 345?

Thanks

THEDEVL :reddevil

Sep 20, 2001 | 05:44 PM

Crushinator

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Joined: Mar 2001

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From: PA

Re: Rear Gears/LT4 (thedevl)

Yup, 3.45's.

Sep 20, 2001 | 05:48 PM

thedevl

Thread Starter

Racer

Joined: Aug 2000

Posts: 407

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From: Huntington Beach CA

Re: Rear Gears/LT4 (Nat96LT4)

Thanks, I put 18s on my car and had to reprogram to keep spedo correct for the 18 inch wheels. Programmer wants to know the rear axle gear ratio as well.

THEDEVL :reddevil

Sep 20, 2001 | 05:54 PM

jpee

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From: Somers NY

Re: Rear Gears/LT4 (thedevl)

No nee to reprogram for the 18" tires.. the "overall" diameter is the same as 17"

Sep 20, 2001 | 07:14 PM

thedevl

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Racer

Joined: Aug 2000

Posts: 407

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From: Huntington Beach CA

Re: Rear Gears/LT4 (Red96Coupe)

Wouldn't the overall tire height be dependant on the size tire. A275 45 18 would be about 2.25" taller than a 275 35 18, right-- or am I missing something.

[(275x.45/25.4)x2]+18=~27.75" = 87.17"/revolution
[(275x.35/25.4)x2]+18=~25.56" = 80.35"/revolution

A 2" difference in height equals about almost 7" difference/revolution which equals about a 9% difference. At 60mph, the error would already be over 5mph, correct.

Did I miss something?

THEDEVL :reddevil