kmascotto

Do all 951's come with a LSD or does it need the 220 code to be added?
thanks in advance
K

Scott at Team Harco

LSD is an option. Yes - code 220, if it came with one.

kmascotto

thank you

KevinGross

Standard with the Turbo S, otherwise an option. Check the sticker.

MAGK944

...and after you check the sticker do a physical check to ensure it hadn't been swapped out over the years.

Scott at Team Harco

Hence my subtle statement about - "it came with one".

931guru

I say, "at least, that's how it left the factory."

mrgreenjeans

Supposedly standard with the '88.2 Turbo S, but there have been seen, some examples of the second series 1988 cars without. Possibly the person didn't want it ( slightly noisier transmission at speed ) or because of driving desires or drive conditions. I just cannot personally think this would be my choice......

OR standard on the '89 model year 951, now once again referred to in Porsche marketing nomenclature, as : 944 turbo, just like the '88.1 and earlier cars were. ( I also have 220 AND M030 listed on the build code tag on my '89- 951. Indicating the Sport Suspension and handling package and the Limited Slip options mutually optioned.

Otto Mechanic

Just curious, how does a person do that sort of check without removing the transaxle?

I ask because I just had an LSD installed in my S2 and for the life of me I wouldn't be able to tell by looking at it?

MAGK944

By "physical check" I mean: jack up the rear and place gear in neutral, then turn one rear wheel the other should turn in the same direction.

harveyf

And if it's not LSD, the wheel on the other side will rotate in the opposite direction of the one you are turning.

Otto Mechanic

Well, I've just had my "duh" moment for the week. Thanks Mike. I think I'll go hide now...

951Dreams

Don't feel bad, I've worked on dozens of limited-skip and open diff cars in my days, and I don't think I've ever noticed this behavior before either. Makes me want to jack up the rear of my G90 equipped Suburban just to verify this. I swear, no matter what, the other wheel has always moved in the opposite direction. But I've likely just never paid attention through all these years.

Unless it's LSD type dependent... I've only worked on Ford and GM LSDs before. Of varying types... Is this a "always true" rule for LSD?

FRporscheman

Yes, it's LSD type dependent.

I don't know about other brands and their systems, but the type in a 944 or 951 is what we here call a clutch type, and this is the one that will exhibit a wheel spinning in the same direction as the one that you manually spin.

The type in the later 968s (and I think some aftermarket ones for the 951) is a torsen type. On this one, when you spin one wheel, the other wheel will spin in the opposite direction, just like an open diff.

mrgreenjeans

the transmission code on top of the transaxle reaffirms the above as well as the trans code on the white build code tag on body and in the owners warranty manual.

Besides the 220 option code which may or may not confirm what's currently residing there ....

Check Clarks Garage or 944 Online charts and verify those 'type' or designation codes; there is a very good chart on Clarks.

It is found under the Information section in the Transaxle page grouping. Each model car, with both open and LSD diffs, is listed; for every country 944s were sold into new.

You must have an inspection mirror and a grease rag with something to clean the i.d. plate on top of the transaxle mounting boss ( if looking at it while in car ), slide under it, and be prepared to get some grit in your eyes.

If the transaxle is already out, just wipe clean that area on the top of trans and you have the transaxle coding and type. Check it against the Clarks Garage charts....