Viper1000

My 2001 C4 has PSM......

sdematt

Yet my 2001 does not.

GC996

No PSM on my 02.

Leedlast

My '03 Targa has PSM. It works great when you are hydroplaning.

wdb

Hmm, non-PSM .2 cars might be more rare than I thought. According to a post in an earlier thread:

https://rennlist.com/forums/996-foru...-standard.html

GC996

It may have to do with a majority of 996.2 cars not having a LSD, so PSM was supposed to save the day.

But I purposely didn't want PSM because i wanted to learn how to drive it on the track. However, I assumed it had a LSD after looking at a few 996.1s previous to buying my 996.2 and found out it didn't. No big deal, I then put on a Guard LSD and have been living happily ever after with a great handling car that you can easily control in varying conditions.

circuit.heart

996.2 Tip here with neither LSD or PSM, and it does that characteristic nervousness when trail braking which makes me sad (my hoodrat BMW has a working LSD and can even use 964 clutches). Does Guard do semi-custom applications? I saw they have "coming soon" Tiptronic applications but I doubt it's 996, unless we share a diff with 997.1 or something.

GC996

Yeah, an LSD adds quite a bit of stability while braking and when the back end wants to step out.

About 15 years ago my indy sent my diff to Guard and they sent it back with the LSD in it. At that time they had a program. I hear they still do it and I also hear they don't do it anymore. Best thing to do is give them a call.

I understand that today their are a couple more providers of quality that you can choose from with varying internal designs.

I do have to say that the Guard has been performed beautifully. My indy just rebuilt it 2 years ago when they dropped the engine and were refreshing everything for me. But I had put on quite a few laps on Hoosiers over its history so a rebuild was inevitable.

Woodman71

It's alive! ALIVE!!!

theprf

Guys in the Turbo forum have been working on this and have a prototype LSD from one of the providers. I donated my old Tip transmission for them to use to get it fitted up.

circuit.heart

Oh awesome, I should read up in that section. Any chance a Turbo 722.6 uses the same diff as an M96 722.6 though

911Syncro

Hi, also have a question about this. I thought all Turbos came with AWD, so an LSD seems to be somewhat redundant. Or would the LSD combined with AWD still create a performance advantage in some way? Or is this for the folks who will disconnect the front wheel drive? Thanks.

theJRUHL

Performance advantage. Even with the power being sent to the front with an AWD system, the wheel with slip will still get more power sent to it with an open diff.

theprf

It uses the same diff.
Yes all Turbos are AWD. Removing the front wheel drive is pretty popular, except you end up with one wheel drive with an open diff. There are several LSD options available for the Turbo manual gearbox because it's almost identical to the 964 and 993 gearboxes.
Removing the AWD with the Tip is less wonderful without an LSD, you're stuck with one wheel drive. So they're trying to get the LSD mostly for those that want to go RWD. If a LSD for Tip had been available I might not have done the manual swap.

TheChunkNorris

It does seem so, I have a 2003 .2 with no PSM.