Gear Ratio

**pipes_ta** · 10-08-2006, 06:27 PM

What is the stock gears in a 2001 pontiac trans am ws6 A4.

**mrr23** · 10-08-2006, 06:32 PM

depends. either 2.73 (GU2) or 3.23 (GU5). look on the driver's door for those RPO codes to see.

**pipes_ta** · 10-08-2006, 06:37 PM

thanks didnt know that

**mrr23** · 10-08-2006, 06:37 PM

no problem.

**daveb91** · 10-14-2006, 05:47 PM

I dont have a label on the drivers door. Anyway else I can tell if I have a gu5?

**Hurley711** · 10-14-2006, 05:48 PM

Get some 3.73's and a nice stall and forget about what stock gears you have, you will thank us later after those 2 mods

**mrr23** · 10-14-2006, 06:23 PM

Originally Posted by daveb91

I dont have a label on the drivers door. Anyway else I can tell if I have a gu5?

look in glove box

**daveb91** · 10-14-2006, 07:15 PM

Originally Posted by mrr23

look in glove box

Nothing in glove box.

**YoMommasTA** · 10-15-2006, 07:00 PM

would be on the drivers door,white label.Otherwise you are going to take the cover off and look if its a "REAL" ws6 it should be 3.42 with a auburn carrier i believe.non ws6 will be 2.73 with a torsen carrier.

**JimmyGTO** · 10-17-2006, 01:10 PM

ws6 = 3.23 ta = 2.73

**BlackLT1Z28** · 10-17-2006, 02:16 PM

Only the 6-speeds had the 3.42 option.
Autos could only come with the 2.73, 3.08, or 3.23 gears.
And it doesn't matter if the car was a WS6 or regular TA, they could come with any gear ratio, unless its an auto (which didn't have 3.42, as mentioned earlier).

GU2 Axle, Rear 2.73 Ratio
GU3 auto tranny,
GU4 Axle, Rear 3.08 Ratio
GU5 Axle, Rear 3.23 Ratio
GU6 Axle, Rear 3.42 Ratio
G80 Axle, Rear Posi-traction (Limited Slip)

93-02 RPO codes for f-bodies.

**daveb91** · 10-18-2006, 04:26 PM

I really didnt mean to thread jack but i did have the same question. My car doesnt have a label on the drivers door and nothing in the glove box. Can someone maybe who has 3.23 tell me there rpms at a certain speed and gear then maybe I can find out that way?

**jwindbigler** · 10-18-2006, 06:35 PM

I agree, just get some 3.73's. I put them in mine, and it made a heck of a difference.

**Marc 85Z28** · 10-19-2006, 12:21 PM

If you're sure its stock look at the driveshaft. 2.73 cars got a steel shaft, 3.23 cars got the aluminum shaft.

**BlackLT1Z28** · 10-19-2006, 07:19 PM

If you're really curious, jack the back end of your car up, and turn the back wheels by hand and count how many times the driveshaft turns for every revolution of the tire.

**YoMommasTA** · 10-19-2006, 07:20 PM

pull the cover and look at the ring gear!

**Carmine lucchese** · 04-11-2017, 10:59 PM

Originally Posted by BlackLT1Z28

Only the 6-speeds had the 3.42 option.
Autos could only come with the 2.73, 3.08, or 3.23 gears.
And it doesn't matter if the car was a WS6 or regular TA, they could come with any gear ratio, unless its an auto (which didn't have 3.42, as mentioned earlier).

GU2 Axle, Rear 2.73 Ratio
GU3 auto tranny,
GU4 Axle, Rear 3.08 Ratio
GU5 Axle, Rear 3.23 Ratio
GU6 Axle, Rear 3.42 Ratio
G80 Axle, Rear Posi-traction (Limited Slip)

93-02 RPO codes for f-bodies.

Lol nope not true I seen ws6 auto cars with 3.42 gears posi and l.slip Don't know where these people come up with this crap

**Whamhammer** · 04-12-2017, 03:05 AM

Originally Posted by Carmine lucchese

Lol nope not true I seen ws6 auto cars with 3.42 gears posi and l.slip Don't know where these people come up with this crap

The only way a an auto model would have a 3.42 gear set is if they either pulled an assembly off of a manual car, or changed the gear in their own diff'.

From the factory, V8 autos only had a choice of 2.73 or 3.23. Manual V8's (post 1993) only had an option of the 3.42 gears.