binxta350

noticed a bit of oil on my rear diff on my94 sti is there a warning light that comes on when fluid is low?don't know how long it has been leakig,that is if it is leaking.Remedise anyone?is it ok to drive?

greasemonkey

No, there's no warning light on the rear diff oil level. There's no low level warning on the front diff/gearbox either. The only way to check is via the dipstick at the front or the level plug on the back.

Is it okay to drive? Impossible question to answer seeing as we don't know how much is leaking! In situations like this it's much better to be safe than sorry, and that means putting the car on a flat surface, removing the top plug and filling til oil starts to flow back out. Use a brand-name 75w/90 gear oil to top up.

While you're under there, clean all the leaking oil and dirt off the diff case with brake cleaner and a paintbrush, so if it continues to leak, you'll have no problems identifying the source. The output seals can be changed fairly easily without removing the diff, while anything else really needs to be fixed with the diff off the car.

binxta350

thanks alot.Is it the gear box filler neck I use for the fluid for the diff??

greasemonkey

Yeah, on manual gearbox cars, the gearbox oil also lubes the front and centre diffs. Separate sticks and fillers on autos though.

binxta350

nice one thanks for the help