What gears do I have?
'89 Trans Am, 305tpi, auto trans, limited slip rear, 15" wheels, drum brakes in the rear. It's got a PERFORMANCE SUSPENSION badge on the passenger side dash if that means anything.
Thanks a lot
-Brian
'89 Trans Am, 305tpi, auto trans, limited slip rear, 15" wheels, drum brakes in the rear. It's got a PERFORMANCE SUSPENSION badge on the passenger side dash if that means anything.
Thanks a lot
-Brian
five7kid
Moderator
close
May 4, 2026
2.73, most likely, unless they've been changed or something else was ordered when new.
You could always pull the diff cover and verify.
You could always pull the diff cover and verify.
Senior Member
Scrape away the rust and grease on the front of the passenger side axle tube near the housing and read the code. Then look up the code in the tech data section. That is what originally was originally in the car (and probably still is).
Miles
------------------
88 427 Big Block Camaro
(Best 1/4) 12.18 @ 113mph 1.75 60ft
(Best 1/8) 7.76 @ 94mph 1.72 60ft
Currently installing 3.73's into my 9 bolt (YES, it is a 9 bolt & YES they are 3.73's, not 3.70. I currently have 4.10 gear sets and new series 3 posi carriers for sale for 9 bolts
)
www.koolmeister.com
Miles
------------------
88 427 Big Block Camaro
(Best 1/4) 12.18 @ 113mph 1.75 60ft
(Best 1/8) 7.76 @ 94mph 1.72 60ft
Currently installing 3.73's into my 9 bolt (YES, it is a 9 bolt & YES they are 3.73's, not 3.70. I currently have 4.10 gear sets and new series 3 posi carriers for sale for 9 bolts
)www.koolmeister.com