The codes GU6 and G80 are for the gear ratio on your vehicle the G80 code indicates your vehicle was eqipped from the factory with a locking rear differential and the GU6 code indicates your gear ratio.
GU6 is just in indicator of the differential ratio a gu6 is a 3.42:1 ratio. it could be single track, limited slip or gov lock. if it is gov lock you should also have a g80 code in your glove box. if so and you tow or have tall tires be ready to replace when master pin breaks
80 g80 g80 g80 g80 g80 g
Check in your glove box for the code... 2.73=gu2 3.08=gu4 3.42=gu6 3.73=gt4,gq1 4.10=gt4 G80=posi trac
Check in the glovebox on the white sticker. Gu6 is the code for 3.42:1 which was standard GT4 is the code for 3.73:1 which was an option.. Also the code G80 would tell you if you have a locking rear differential.
the 3.42:1 ratio was standard for that year if you look in the glovebox there is a white sticker with a list of codes you are looking for in the G section GU6 for 342 or GT4 for 3.73:1.. Also G80 is the code for locking differential.
80 mg = 0.08 g80 mg = 0.08 g80 mg = 0.08 g80 mg = 0.08 g80 mg = 0.08 g80 mg = 0.08 g
They came with different ratios. Look at the code sticker with all the three-character codes. Could be on the door or inside the glove compartment. Look for a GU with a number. If it has a G80 by it then it's positraction. GU6 is a 3.42 and you can look up all the others online. Search GM RPO codes and it will tell you.
Saves input shaft spline
You don't
the purpose of the spline is to support the weight of your head
It will either be a 28 or 31 spline. I believe that most open rear ends used 28 spline and the limited slip rear ends used 31 spline.