What would be involved in changing from 2.73's to 3.73's in my IROC? I do have experience doing gear swaps, I just want to know if the gears will fit the carrier or if anything would have to be changed.

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'87 Camaro Iroc-Z
'92 350 .040-over
Mild Cam
700R-4 w/shiftkit only.
Edelbrock Perf. manifold and Holley 750w/vac. sec.
GM HEI upgraded with Accel parts
TBI truck Heads
Badass 3" true dual exhaust.

 

Check this link out: Gear Swap.

If you are indeed going from 2.73 to 3.73, you will need to get 3.73 gears specailly made for "2" series carriers, unless you swap to a "3" series carrier.

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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
4wheel Disc Brakes
Summit 1-5/8" headers, 2.5" Dynomax catback.

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'97 Bonneville SSE