i was just wondering if anybody has the GM part numbers for 3.73 speedo gears. i had a 2.73, and my car shuts off at like 90--very annoying driving down the expressway. What do i have to change, the drive or the driven gear? can i do it myself pretty easily? thanks for all your help.

 

Speedo gear install. Here is a tech article on installing speedo gears, and has the part numbers in it for the 3.73 gears.

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'87 Trans Am
S/D TPI retrofit including functional PassKey,
22# injectors,
Whatever chip I feel like burning,
JET AFPR, Ported Plenum,
TB Coolant Bypass, Custom Cold Air,
SSM SFC, KYB Shocks, Boxed LCAs, Wonder Bar,
8mm Accel wires,
Flowmaster Exhaust,
16" GTA rims,
Corvette Servo,
3.73 Posi
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Summit 1-5/8" headers, 2.5" Dynomax catback.

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'97 Bonneville SSE