pp000830

Just a few data points for your consideration:
96 993 Carrera with 70k miles:

Replaced the clutch and synchros for gear 1 & 2, plus 3 for good measure.
Car driven to work every day - not driven hard or raced.
Also the differential exhibited some small chips in the tooth fascia of one of the smaller inner gears. I have come to understand this is quite common. Swapped the differential out for a rebuilt one.

I got similar service life out of the 915 tranny in my previous 86 Carrera. Its differential was fine.

The above suggests that doing the above once and replacing the hydraulic cartridges in the valve lifters once are likely all the major / internal repairs you should see in the life of the 993 if you do not abuse the vehicle.

Your thoughts?

Andy :-)

Edward

My original clutch was good untill around 115K miles or so. Now at 132K or so and the tranny still shifts perfectly smooth w/o hesitation or noise. The 915 is a different story; the G50 (of which ours is a variant of the original G50 that replaced the 915). The 915 is a perfectly strong trans, but requires a different style of shifting/driving if we're to expect it (particularly synchros) to last as long.

Edward

matt777

My clutch was 50% worn at 71k. Clutch wear can vary drastically depending on the driver. I wouldn't have expected the need for any tranny work until well over 100K (excluding limited slip diff).

ginch

I've been wondering about this as well. Why does it seem that these cars all need new clutches around 50-60 miles (I know not all but a lot do)? My other cars (all manual) have never need a clutch replacement. Is it because maybe in general the cars are driven harder than the everyday commuter?

Leucadia

75k on mine and the clutch seems fine. Mine however Is a 2 owner car and the PO just drove 90% back and forth from temecula and rancho Bernardo in the 15. Pretty much no hills and no shifting. So I'm expect to get well over 110k on this clutch.

Black993

93k on mine and clutch is starting to suck.

Linnm

Rule of thumb, transmission out for any reason, replace the clutch.

Falcondrivr

i got 95K out of my last clutch. Tranny has 152K.

race911

No way, no how do we compare a 915 or its 901 predecessor (and its Porsche proprietary synchro) with the Borg Warner synchros of the G50. Actually, it's not the synchro that packs up with the 901/915, it's any/all of the dog teeth and shift sleeve. I've reassembled more than one of those from spare piles of parts and reused decent synchro bands.

Where does a G50 fail? Those who have had their hands in many, many, many more units than me can say for sure. I've done 5 or 6, from near new (install steel sychros) to a 150K+ mile unit that I did pretty much "just because." Nothing amiss inside, and I raced it in RSA #1 for all three seasons.

Slow Guy

Way, way too many variables decide clutch life. Mostly hi-way driving vs. mostly city, used in hilly area like San Fran or flatlands of Florida. Skills of the driver. There's just no way to decide "average" clutch life. IMHO

If you think you have a clutch having problems make sure you bleed your slave cyl. first, you may be pleasantly surprised.