are there any washers on the drain/fill plugs on the tranny, transfer case and the rear diff?

 

Yes there are washers on them.

 

do they need to be replaced like the one on the engine oil drain plug?

 

not on the first fluid change, they should be fine. After 2 or 3 changes you should get new washers.

 

I could be wrong, but I think recomends changing them every time. I just did the tranny + diffs change myself, and the washers were pretty cheap. Be sure to use fliud with a proper friction modifier in the rear diff.

One other detail, I wouldn't suggest the Redline MT-90 for the tranny. I ordered some and found out it is GL-4 rated. The tranny wants a GL-5 fluid. I did use the Redline 75-90 in the diffs though (it does have a friction modifier) and it seems to be working great so far.

 

CHanged all the fluids and used the same washers. Doesnt leak. Hell I have changed my oil 6 times using the orig washer and it never leaks.

 

actually the tranny calls for GL-4 not GL-5. GL-5 can be used in the t/case and rear diff.