Anyone know where to get speedo gears for my tranny?
Thread Starter
Senior Member
Joined: Oct 1999
Posts: 566
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From: New Britain, CT, U.S.A
Car: '87 IROC
Engine: LT1 350
Transmission: 700-R4
Anyone know where to get speedo gears for my tranny?
I installed a Moser rear end w/3.90 gears and I want the correct gears to put in my tranny. Can anyone point me in the correct direction to where to get them? The closest I have are 3.73 speedo gears.
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Joined: Jan 2000
Posts: 20,981
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
What year and model is the car and what transmission and tire size do you have? You could be S.O.L. with anything numerically higher than 3.73.
Senior Member
Joined: Jul 1999
Posts: 994
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From: San Diego, CA
If you are using 3.73 speedo gears, which is a 15T drive and 45T driven on a 245/50/16 tire, that is the closest you are going to get. Someone needs to make a 46T, or even better, a 47T driven for it to be correct with your 3.90 gears.
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1989 IROC-Z 5.7L
NOS 150HP kit
ProBuilt 700R4, PI Vigilante 2800 stall lockup
Baer Brakes 12" Sport System
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1989 IROC-Z 5.7L
NOS 150HP kit
ProBuilt 700R4, PI Vigilante 2800 stall lockup
Baer Brakes 12" Sport System
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