Hello all - I'm new to the forum and recently purchased a 996tt that I bought from a member here. I drove it home to San Diego from Jackson, MS without event - it was a great drive.

Upon arrival, after the first night back, I noticed a relatively large pool of oil below the car that seems to be accumulating and dripping from the passenger side rear axle where it meets the transmission. Any ideas as to what this could be? The oil doesn't appear to be thick tranny fluid and smells similar to engine oil. However, the engine oil level appears to be holding constant. Any input is useful - pics attached.

 

could be as simple as a drain bolt not tightened to spec! happened to me before! i can't recall the socket size? but dbl check and just tighten the oil pan an crank ones

 

yea the drain and fill bolts looked fine and couldn't find any other bolts that could be loose...

 

Clean everything and keep looking is about all you can do= hopefully something simple.

 

likely could be the axle seal. as it seeps out it can get flung all over. its a 75/90 gear oil not all that thick

 

this is the preliminary diagnosis i believe i as well.

any idea as to the time to do said repair and potential related costs? again, i'm quite the porsche noobie...

 

Also check power steering fluid level, could be Pentosin...

 

yea, that was one of the first things I checked - it was fine. if it was that, where, given the leak location, do you think it would be leaking from?

 

If you do the seals yourself it cheap and not that hard.

 

The P/S system boosts the clutch. There's a metal line that runs between the pump and the slave cylinder. On my car that line had a fitting fail at the pump way up in the bowels of the car, it required pulling an axle on the driver's side to replace. It made a pretty big mess and coated the entire rear of the car....

 

if it turns out to be the axle seal. drain the diff. the trans and differential share the same fluid. once the diff is drained remove the 6 axle allen bolts. need 6 new they are one time use. drop the axle down and let it hang. theres a bolt in the center of the stub axle. remove it. the outer case has a circle of bolts. remove them and remove the outer housing. theres a rubber ring on the outside edge and a seal on the inside

 

thanks a lot for all the replies, guys. i'll get back under it tomorrow and see what i can figure out!

 

correction lack of sleep on my part. pass side is the same except the housing is cast onto the diff. so theres only the single axle stub seal. i was thinking drivers side

 

yea so it ended up being the diff seals at $27/ea, replaced both and got a post-purchase inspection at the same time from a local indy mechanic - pretty stoked overall.

now, time to beat on her.

 

then you need something like this! stage 5 1000 hp dss axles