Hi ron54:

I'm not sure if you are asking about the front or rear diff plug gasket, but the rear has no nylon gasket. If you are concerned for the rear plug leaking, just wrap a few turns of teflon tape around the threads. That should do it.

As for the front plugs, just do the same or take the original nylon washers into your local parts store and the guys at the counter should be able to match some generic ones for you cheap.

Good luck.

thwack

 

Sorry, THWACK:
There is a gasket on the rear differential fill plug for the 2007 Classic. I just finished changing the gear oil in the rear differential. I don't know what the part # would be.