View Full Version : Rear Differential Seals.... How hard to replace?

01-13-2010, 09:39 AM
So the imput shaft/pinion (driveshaft) seal to the diff is leaking as well as the output (axle) seals to the diff are leaking..... :( Seals are cheap from ECS, so how hard to install?

01-13-2010, 10:00 AM
Not sure what you mean by input/output but i had the seal between the drive shaft and rear diff (where the shaft connects to the diff replaced as the were leaking when i bought the car. Not hard to do. Will take you about an hour to do both sides. You will have to drain and refill the rear diff oil as it will come out with you take the shaft an seal out. It's 75w90 oil. I went with royal purple for both the diff and transmission and it works great. Can't remember how much you need for the rear diff but i think it's around a quart or so. There's a great DIY on audiworld to do the rear diff oil change incase you don't know where the bolts are.


01-13-2010, 10:02 AM
Also make sure you open the fill plug before you open the drain just incase.

ECS Tuning-Audi
01-13-2010, 02:14 PM
I believe it is 1.9 for a manual and 1.5 for an automatic. It has been a few months since I did it though. But it is definitely 75w90

01-13-2010, 02:52 PM
Output shafts are fairly easy (it's all relative). Pinion seal at front of rear diff us
uch more complex - have to remove exhaust and need special tool to remove clip inside the housing. The tool is easy to find, but my mechanic spent about 20 min just trying to remove the clip. The dealership charges twice as much fir the pinion seal compared to the output shafts. I did my own output shafts, but had mechanic do pinion.

01-14-2010, 07:36 AM
Thanks d00ds.

01-14-2010, 01:50 PM
wanna do it at the shop?

01-18-2010, 08:15 PM
^ who are you?