DanR

First off I did a search but could not find what I was looking for. As part of my rebuild to run in stock class I need to change out my S2 R&P which is currently bumping me into prepared. Whilst the box is open I was planning on getting the factory LSD rebuilt as its 2 years since it was last looked at (car is a 88 951 TS)

So this got me thinking, rather than spend money on a rebuild why not replace with a guards GT 80% lock up LSD........ so here is my question. Is this a worth while ie noticable upgrade to make for a race car. Is the incramental improvement vs factory worth doing?

Bernie930

You can't go wrong with a GT diff., give Matt a call, you won't regret it.
Bernie

schwank

I put a GT LSD in my 944 Cup car. From everything I have read the GT is more robust for track use. Mainly saw posts about the clutch packs in the factory diff not being up to repeated beatings.

So far I love the Guard. That said I have no reference as my car was an open diff previously. I got hooked up by GBOX in Boulder, Co. They are a sponsor here on the list.

333pg333

In a word, 'YES'.

Van

Hmm... my LSD hasn't been serviced in 22 years... I wonder how much it's degraded.

xupkid2

Dan, a factory LSD rebuild is prety cheap. Guards will do it for like $300-350. Also not sure you can go to a 80% lockup in stock class since the factory one was only 40%. I went through this same thing last year when I rebuilt my gearbox. I went with the stock rebuild cause it made the most sense.

analogmike

The stock one can be built with the Guards discs, if so I think they are the same. You can set the factory ones to 80% too. I have one from an 80s 911/930 if you need one (not sure what car you are building).

DanR

thanks Mike, but it is a 944 not a 911

Dubai944

I have had a GT 80/80 in my 944 racecar for a couple of seasons now. Absolutely recommended.

disasterman

The Guards unit is excellent. I have been running one all year and am very pleased with the performance. Note that it requires professional installation and proper shims. It is not cheap to buy and install. A stock LSD is a much cheaper way to go (by about half).

mikew968

Are you sure you want that much lockup? How does that affect handling?

jrgordonsenior

80/80 is usually used for a A/X type of event where you're constantly tossing the car around. The GT diff is easily adjustable to 50/80 lockup ratios which are better suited to road racing. You'll love the stability of 80% lockup under decel...

smlporsche

After a long conversation with Paul Gaurd I went with his reccomendation of a 50/80 LSD and could not be happier.
I would not want an 80/80 lockup...

DanR

I also spoke to Paul last week and he reccomended the same thing for my car making stock power! He said the 80/80 is more suited to bigger hp cars

95ONE

80/80!? that sounds retarded.. why not just weld the thing in the middle? Im not saying I know Im right, but please help me understand. It seems like when turning at 80% lockup, you'd just have to drift the damn corner. And of course under decel, you'd just swing your *** around violently. What am I missing?