TH400 Drive gear and driven gear question
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Joined: Jan 2011
Posts: 18
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From: New Orleans, LA
Car: 87 Iroc Z-28
Engine: 388 SBC
Transmission: 700R4 to modded TH400
Axle/Gears: 7.5" 4.10 to 9" 3.70
TH400 Drive gear and driven gear question
I just did a TH400 swap into my 87 Iroc. I am needing some help on figuring out what drive gear and driven gear I need for a 3.70 rear end ratio. It is a mechanical speedo. Thanks.
Joined: Jul 2000
Posts: 6,521
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From: Aridzona
Car: `86 SS / `87 SS
Engine: L69 w/ TPI on top / 305 4bbl
Transmission: `95 T56 \ `88 200-4R
Re: TH400 Drive gear and driven gear question
As long as you have 44" Super Swampers and a healthy lift on that Camaro, you're gonna need a ratio adapter too.
Got tire size?
Most of the 700-R4 speedo gear wisdom here is going to be the same w/ each having an available 15 tooth drive gear (and others.)
Every "speedo gear calculator" gives different results than what GM used in production vehicles.
So...
Got tire size?
Got tire size?
Most of the 700-R4 speedo gear wisdom here is going to be the same w/ each having an available 15 tooth drive gear (and others.)
Every "speedo gear calculator" gives different results than what GM used in production vehicles.
So...
Got tire size?
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