For a mid 60’s SM420, would any of you know the GM part number for the rear counter shaft bearing snap ring? For reference, the early SM420 had a plate with two bolts where the late had a snap ring.

If the link works, it is number 66 in the exploded view below.

http://kinzers.com/don/landcruiser/transmissions/sm420/doc/300x300/sm420_3.jpg

Mine is missing and need to locate a replacement.

Thanks