Think I have a differential seal leak??
 

99 boxster base tiptronic. Noticed something had been leaking for awhile this winter when I changed the tranny fluid. Glad I checked the differential oil as it appeared very low and if I would have left it would have been bad one day! Topped off gear oil and have driven for a month or two. Drove it yesterday and it got cold last night, and there was a puddle of oil on the garage floor when i backed it out to wash it this morning. 99% positive it is the gear oil by looks and smell. Appears to be a slow leak from where the cv axle goes into the tranny. But does not look like was enough to leave a puddle of 2-3 ounces??

Anywhere other than the cv shaft seal that oil can leak from? And debating on how easy of a diy this would be or if I should take it to a shop depending on cost???

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Cv boots are fine, aos recently replaced and no leaks. Positive its gear oil by smell and was low when topped off, so suspected that was the leak I found this winter?


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could be that the transaxle seals around the drive shaft are too old (dry..?)
.

PS last Sunday, I replaced both driveshafts on our Volvo V70 and my back still hurts ... :-(
but for you will be an extra step to replace the shaft seals on the tranny.

Removing the cv axle to change the right rear differential seal. 90% sure thats where the leak is coming from. While the axle is out going to go ahead and replace both cv boots.


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That's your problem, tricky part was getting the old seal out.

That was the cause of the leaking. New seal, inner cv bearing, and 2 new cv boots. Put some miles on this week and not a sign of a leak any longer.


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