While replacing the transmission mount on my 2010 LS460 with 204k miles, I noticed a slight oil leak at the transmission output. It might be caused by a bad mount. At high mileage, engine/transmission mounts definitely need to be replaced.I looked it up and the seal is quite inexpensive. May I konw if anyone has replaced it before? Is this something that can be done as a DIY job? Thanks

 

This is not a leak. Leak is when you see oil droplets on the driveway. This is rather slight wetting. Don't bother, just keep your eye on it. If it took your tranny 200 000 miles to develop slight wetting, you probably have another 200 000 miles to go before it actually starts leaking and will require some action. LOL.

 

Clean it off and check to see if it has drops forming after a short drive, it may just be normal seal wetting/seep. If it is dripping or the area gets wet again after a very short drive then you may want to replace it

Replacement is easy, remove the driveshaft and old seal then drive a new one in

 

Looks same as my underwear. No big deal.