It was about $3 for the crush washers for the rear diff. I picked them up at the dealer and I get a discount there that I forgot about so I guess itll be around $9-$12 to do all of the drivetrain. Its still alot in my book for some crush washers. I think I found similar washers through wurth for cheaper but havent verified the size is correct yet.

 

I work in parts at a Porsche dealer. Looked through my bins for this exact same thing. For my 06 IX MR the Porsche p/n 90012310630 (runs about .65 cents) is perfect for the 6sp drain and fill, TC drain and rear diff drain. I know Mitsubishi has 5 part numbers for these 6 different plugs, but the ID's are almost a perfect match, the OD is a little off on a couple and the OEM rear diff washer is copper where the Porsche one is not. The Porsche washer is an aluminum crush ring for almost all late model oil drain plugs so it's a perfect match for the job.

I couldn't get a match for the TC and rear diff fill though.

Hope this helps.

 

Interesting. Thanks for the info, I will have to look into that.