I'm trying to figure out if my s4 convertible has LSD diff. The car is equipped with the larger brakes, ate there any ways I could visually verify which diff I have?

 

Jack up the rear of the car and spin the wheels.
If they both spin the same direction, you've got a LSD.
If they spin opposite, it's open.
If one side doesn't spin at all, you have trouble.
With a capital T and that rhymes with P and that stands for POOL!


sorry...

 

i thought all s4 verts came with open diffs?

 

I actually tried spinning the wheels while the car is on stands and only one side spins

 

it should be open. with it in the air, put the car in gear and spin a wheel, if its just free then its open. or you can just lift one wheel and spin it, if it takes more than 20 Ft-lbs its LSD

 

No LSD for me..thanks for the help guys

 

Remember, just say no.

 

..Right here in River City Clokker!..

 

That is exactly the case. Only 2nd gens that came stock with LSD's were S4 GXL and Turbo's, and S5 GTUs and Turbo.

 

Actually, the S4(88) GTU came with the LSD/clutch-type.

The S4/88 GTU is NOT the same as the S5/89 GTU. The 89 GTU is like the earlier(86-88) Base model. This seems to be a very common mis-understanding in the community and eslewhere.


R./ John
88 GTU

 

Yup, he's correct. At least for the 88's. No GTU in the earlier S4 model years.

 

Picking up a s4 turbo 2 diff this afternoon! That should solve my LSD woes.

 

I hope you have a custom driveshaft (NA yoke, TII diff flange) to go along with it.

 

Sorry I didn't include more details as what I'm doing with the car, it's currently getting a turbo 2 swap and I have the transmission and driveshaft, today im picking up the rear diff assembly and half shafts.

 

Yea, I was wondering about that, I've never heard of a clutchtype lsd vert before.