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tingo99
04-09-2008, 04:08 PM
Where Do I Find Out What Kind Of Gears I Have In My Car I Have A 99 T/a
MikeMoss
04-09-2008, 06:33 PM
RPO codes

GU2 Axle Ratio 2.73, Rear
GU4 Axle Ratio 3.08, Rear
GU5 Axle Ratio 3.23, Rear
GU6 Axle Ratio 3.42, Rear

It says that is for 2001 but I would think that it would be the same.

http://www.bowlingss.com/RPO%20Code%20List.htm

http://www.ls1.com/forums/showthread.php?t=16147
FirstGT
04-09-2008, 06:34 PM
Look for the RPO code on the inside of the driver's door.

GU2 2.73 Rear Axle
GU5 3.23 Rear Axle
GU6 3.42 Rear Axle
RARON455
04-09-2008, 07:08 PM
If you cant figure that out, jack the rear of the car up, put it in nuetral, make a mark on the drive shaft, and then on the tire have someone spin the tire one whole revolution while you are under the car and count how many times the drive shaft turns.

example, tire turns 1 revolution and the driveshaft turned about 3 and a 1/2 turns

your ratio would be a 3.42 etc. the code on the door is easiest, as long as the gears are stock.
PittZ28
04-09-2008, 07:19 PM
If you cant figure that out, jack the rear of the car up, put it in nuetral, make a mark on the drive shaft, and then on the tire have someone spin the tire one whole revolution while you are under the car and count how many times the drive shaft turns.

example, tire turns 1 revolution and the driveshaft turned about 3 and a 1/2 turns

your ratio would be a 3.42 etc. the code on the door is easiest, as long as the gears are stock.


huh - learn something new everyday - sucks though that mine says gu2
tingo99
04-10-2008, 01:27 PM
cool thanks
tingo99
04-10-2008, 01:32 PM
cool i have gu6
INMY01TA
04-13-2008, 01:13 PM
If your car is a six speed, all six speeds got 3:42s.
TedsB4Csled
04-17-2008, 12:59 PM
Need a set of 323's? Just swapped mine for 373. Shifts to quick now, I thought it would let RPMs climb more in lower gears for auto. Highway RPMs are higher, sucks. I wish I kept 323 and got a tune instead. WOT is cool though.
Wesman
04-17-2008, 01:02 PM
RPO codes

GU2 Axle Ratio 2.73, Rear
GU4 Axle Ratio 3.08, Rear
GU5 Axle Ratio 3.23, Rear
GU6 Axle Ratio 3.42, Rear

It says that is for 2001 but I would think that it would be the same.

http://www.bowlingss.com/RPO%20Code%20List.htm

http://www.ls1.com/forums/showthread.php?t=16147

What F-body came with 3.08's?? :think:
Y2KPewterSS
04-17-2008, 03:58 PM
What F-body came with 3.08's?? :think:

V6s
Wesman
04-17-2008, 05:24 PM
V6s

Ahh, gotcha. Didn't think of those.
dparsons1968
04-17-2008, 06:20 PM
Are those codes good for a 99 Camaro M6 also?
Y2KPewterSS
04-17-2008, 06:37 PM
Are those codes good for a 99 Camaro M6 also?

Yes