Rear gear availability
Joined: Jul 1999
Posts: 2,926
Likes: 5
From: Tucson, Arizona USA
Car: 1987 Z28 Convertible
Engine: 305 TPI
Transmission: 5-speed
The following is a breakdown of rear axle ratios available on a 1987 Z28 (without the IROC-Z option):
LG4 - MM5: 3.23 RPO GU5
LG4 - MX0: 2.73 RPO GU2
LB9 - MM5: 3.08 (required G80) RPO GU4
LB9 - MX0: 2.73 (required G80) RPO GU2
LG4 = 305 carb
LB9 = 305 TPI
MM5 = 5-speed
MX0 = Automatic
G80 = Limited slip differential
No optional ratios were available.
------------------
Willie
Supercharged 1987 305 IROC-Z, Daily-Driver, Emissions-Legal.
12.57 @ 111 mph.
12.04 @ 114 mph (50-hp nitrous).
http://members.optushome.com/au/downunder1/rides/willie/willie.html
1987 "20th Anniversary Commemorative Edition" Z28 Convertible -- Super Chevy Show Class Winner, 1998.
LG4 - MM5: 3.23 RPO GU5
LG4 - MX0: 2.73 RPO GU2
LB9 - MM5: 3.08 (required G80) RPO GU4
LB9 - MX0: 2.73 (required G80) RPO GU2
LG4 = 305 carb
LB9 = 305 TPI
MM5 = 5-speed
MX0 = Automatic
G80 = Limited slip differential
No optional ratios were available.
------------------
Willie
Supercharged 1987 305 IROC-Z, Daily-Driver, Emissions-Legal.
12.57 @ 111 mph.
12.04 @ 114 mph (50-hp nitrous).
http://members.optushome.com/au/downunder1/rides/willie/willie.html
1987 "20th Anniversary Commemorative Edition" Z28 Convertible -- Super Chevy Show Class Winner, 1998.
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