Gen 2.5 automatic transmission drain plug bolt crush washer: MD951858
I had a helluva time trying to find anything that would fit the AT drain plug bolt as my washer was done for. I tried Autozone, O'Reilly's, OSH, HomeDepot, Dorman online catalog. How could something so small cause me so much headache?? OEM is a crush washer like on the engine oil drain plug vs a simple aluminum or copper washer and are $3-$4 from the dealer or online OEM vendors.
Fwiw, I figured out the cause of my lack of power and poor fuel economy. The keyway was damaged on my crankshaft timing sprocket, effectively retarding my timing by nearly 2 teeth. Just posting this as a heads up to check this when you do the timing belt job. After fixing mine, my power and fuel economy have both increased dramatically. Here is a picture of what I found.
I just replaced these items recently on my soon-to-be scrapped Monty. I was hoping to pull up the web order and give you the part numbers, but wouldn't you know, www.mitsubishiparts.net website is down and being retooled! Here is what was in the confirmation email: