E-Man

I had my local dealer look over my Gen 1 RS because the warranty is soon to expire. They told me that the clutches are completely worn out in the LSD. my question is how dangerous is the car to drive on the street? I'm suppose to go on a 1,000 mile road trip in a few days and I can't decide if I should take the car or not. A few weeks ago I drove the car 850 miles in three days and did not feel anything unusual at all! (spirited driving). So do I park the car and forget about it until it is repaired or drive it another 1,000 miles? Thanks!

P.J.S.

You can drive it worry free, you just will not have a functioning LSD

You will not harm the car

tripleblack

^ +1

E-Man

So I don't have to worry about swapping ends when exiting a corner?

rodjac

You could feel some rear end movement on very heavy braking and some wheel spin when very hard on the throttle coming off an apex at the track but you are highly unlikely to feel anything on the road unless you exceed all limits of reason and safety. After all, some of us drove daily drivers that didn't have a limited slip (my 71 Mustang for example) and didn't know were missing something.

tripleblack

Most Caymans sold to date have open diffs. LSD is an option.

deputydog95

Mine has been shot for quite a while now. Just haven't allocated the funds yet to do a proper repair. No worries. I still track it. As the others said, it's better with the LSD but certainly not an issue where you can't use the car.

P.J.S.

Then when you are ready - get a guard and you will be glad that your stock one is toast

Carrera GT

Incidentally, I just decreased the rear brake bias a bit by changing rotors and it has suppressed the rear tail-wagging under threshold braking at higher speeds (say about about 80-100mph.) I was paying careful attention because I was anticipating that reduced rear bias would increase the tail-wagging and "rear steer" under heavy brakes or tease the ABS or some aspect of SC (it's a 997.2 RS) into intervention -- that's complex to explain, but if you imagine the rears are now about 1% reduced, then the differential bias could become greater because the brakes are not serving quite as much differential slip resistance. The car's also running 345 Hoosier R6, which introduces two other factors -- the car is already hooked up unless the driving is untidy; and, a characteristic of the A6/R6 is initial "skate" which gives the yaw sensor something to think about. Fortunately, not apparent issues whatsoever, if anything, the 1-1.5% decrease has reduced the willingness of the car to go into ABS, making me question whether the considerable increase in rear brake bias in the 997 GT3 over the 996 GT3 brought some unintended consequences where the decision was made to compromise a little threshold limit in favor of better performance at lesser degrees. Maybe I'm just accustomed to stopping a 911 on its nose. Maybe the track had good grip that day. Maybe, maybe, maybe. Nothing scientific about my work. Pleased to find my car still has a functional LSD (noticeable through the carousel T6 at Sears on a cold track) but I know it's only a matter of time.

ir_fuel

Most 911's too.

D-Uber Cars

Since you do drive your RS on the street and have not noticed, as long as you continue drive in a legal street mode before you get fixed, you should be OK.
Interestingly, when you do get fixed it there is a notable difference.
Guard is the way to go.

E-Man

What is a guard? Is it an aftermarket part?

tripleblack

http://www.guardtransmission.com/diff_LSD.html

D-Uber Cars

Matt Monson
Guard Transmission LLC
303-530-1094

Yes, aftermarket however in this case as good or better than OEM when it comes to the P-car diff.
I would highly recommend giving Matt a call. Have Guard replacement in mine along with many others on R'Listers. I am not affiliated nor do I receive any added incentive from Matt for this recommendation. Just a happy customer.

It will boil down to this, replace with OEM under warranty. Be advised, that it will be highly likely that the replacement will too burn out. Or, replace with Guard and be done with it.

993Brendan

The LSD on my 993 was trashed for the first three years I owned it. Didn't even know I had one until I checked the option codes. Sent it off to Guard Transmission and couldn't be happier!