Diff ID

[r lane]

I think this is a LS diff out of a street G50. Can anyone confirm that or identify it. Thanks, Bob

[Matt Monson]

GKN LSD for 993 or later. It has the part number stamped in the side. It could be any number of specifications.

[r lane]

Thank you. Bob

[Bill Verburg]

#s on the side would look like this


if it's a 993 GKN the spec is either 22/40 unless it's from a 993RS trans

22/40 ramps look like this


22/40 part # 950.332.083.00 or .03

[Matt Monson]

Originally Posted by Bill Verburg

#s on the side would look like this


if it's a 993 GKN the spec is either 22/40 unless it's from a 993RS trans

22/40 ramps look like this


22/40 part # 950.332.083.00 or .03

Actually there are more options than that.


950.332.083.02 25/65% G50.20/21 95+
950.332.083.03 22/40% G6420/21
950.332.083.38 40/65% G50.30/31/32

[Bill Verburg]

Originally Posted by Matt Monson

Actually there are more options than that.

950.332.083.00 22/40% G50.20/21 -95
950.332.083.02 25/65% G50.20/21 95+
950.332.083.03 22/40% G6420/21
950.332.083.38 46/65% G50.30/31/32

Your right, I need better glasses
the 22/40 was for a g64 anyway

funny my PET, shows different data for the -95
950.332.053.05 ZF 25/65 -95 g50/20, 21
950.332.083.02 GKN 25/65 96- g50/20, 21
950.332.083.38 GKN 25/65 96- g50/30, 31, 32

950.332.083.30 40/65 993RSR
950.332.083.33 40/65 993Cup


950.332.083.03 GKN 22/40 G64/20, 21

+ all the turbo and GT2 that I didn't bother to look up

[Matt Monson]

My PET didn't show the .00 so I just took your info at face value. I googled it and got no results so just assumed you were right on that one. I've just edited it out for clarity.

The break from ZF to GKN has always been hazy to me. They never offered a gearbox number break for the change like they did with the slide on 2nd gears.

[r lane]

I was told that this diff was for a street G50/1, a 3.2 car. I have old eyes, but I don't see any script on the side of the housing. Just the cap. Bob

[Bill Verburg]

Originally Posted by r lane

I was told that this diff was for a street G50/1, a 3.2 car. I have old eyes, but I don't see any script on the side of the housing. Just the cap. Bob

If it's from a G50/01 then it's a 40/40 ZF 950.332.053.06

[group911@aol.co]

And then there is the 083 01

[Bill Verburg]

Originally Posted by group911@aol.co

And then there is the 083 01

What did that come from? looks like some 993 version

[group911@aol.co]

Or the 950 099 332.35??

[group911@aol.co]

Originally Posted by Bill Verburg

What did that come from? looks like some 993 version

I just have it labeled as GKN 2 plate?

[Matt Monson]

Originally Posted by r lane

I was told that this diff was for a street G50/1, a 3.2 car. I have old eyes, but I don't see any script on the side of the housing. Just the cap. Bob

You were told wrong. Porsche used ZF for all of the 3.2s and 964s, and that is 100% a GKN LSD.

[Matt Monson]

Originally Posted by Bill Verburg

If you guys want to get down the nitty gritty of it, you should open up the LSDs (just 3 screws) and look at the stamping on the pressure rings themselves.

These ramps are 26/65 and will be stamped 7&8 on one of the 4 ears that ride in the housing. I've got a list of most of them somewhere, but every set of pressure rings has a sequential pair of numbers on them indicating the ramps cut into them.