[jbinghampton]

Are all CTS-V's LSD (limited slip)? How would I know if all I have is the unit from the car?

Thanks

 

[RocketSled]

Pretty sure they are. And you could be 100% sure by popping the cover off the Diff and checking for clutches. Or if there's a Part Number on the casting someplace, you could look that up on-line.

 

[2012CTSV]

GM RPO Codes – Factory Identification Labels and Interpretation

RPO Code	Description	Ratio
GU5	Axle Rear	3.23

 

[MrSurly]

ALL Gen 2 Vs are LSD. There are only two part numbers for replacement (brand new GM) , one for A/T one for M/T (different ratios) all LSD.

 

[MrSurly]

Pretty sure they are. And you could be 100% sure by popping the cover off the Diff and checking for clutches. Or if there's a Part Number on the casting someplace, you could look that up on-line.

This is not a thing. The Gen2 V diffs don't have rear covers. To open one, you have to entirely remove it from the car and remove the side cover (split it, basically)
here’s one partially removed

 

[jcs003]

Yep...it's a crime how GM designed this thing.

 

[RocketSled]

Ah. I have learned something new.

Yeah. On my C5 Corvette, you had to drop the rear suspension cradle (which also carried the gearbox and "torque tube") to change the clutch (which was up front with the motor).

 

[loweredd]

The design is pretty good, isn't it? Wheelies and 9s on a stock rearend?

 

[MrSurly]

Yes, the V2 diff is a very stout beast and the perfect counterpoint to the exploding V1 units.
The only failing of the V2 design (IMHO) is they made it so extremely compact that its internal volume and fluid capacity is too limited. This leads to overheating and oil breakdown and the wear that turns into noise.

But as far as strength I think it’s as tough as a 9”.


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[Rubber Duck]

Yes, the V2 diff is a very stout beast and the perfect counterpoint to the exploding V1 units.
The only failing of the V2 design (IMHO) is they made it so extremely compact that its internal volume and fluid capacity is too limited. This leads to overheating and oil breakdown and the wear that turns into noise.

But as far as strength I think it’s as tough as a 9”.


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But the axles are not, especially when compared to the Ford 31-Spline Axles.

Cheers

 

[V Wagon]

GU5 is the ratio. G80 is the limited slip RPO.

 

[LoudV8]

Are all CTS-V's LSD (limited slip)? How would I know if all I have is the unit from the car?

Thanks

Are all CTS-V's LSD (limited slip)? How would I know if all I have is the unit from the car?

Thanks

GU5 is 3:23 ratio

 

[SUPER DAVE]

Pretty sure they are. And you could be 100% sure by popping the cover off the Diff and checking for clutches. Or if there's a Part Number on the casting someplace, you could look that up on-line.

THE CTSV from 16-19 all have. Here is an old timer easy assesment of ANY rear drive axle; With both rear wheels free of the ground; TRANS IN NEUTRAL; spin one rear tire. IF the opposite side tire spins in the same direction YOU HAVE A POSI. IF it spins in the opposite direction, you DO NOT HAVE POSI. I learned this getting vega rear ends in a junk yard. ALSO; If you are lucky enough to have a tag on one of the cover bolts saying to use only "limited slip lubricant.......GOOD LUCK!!!!