JW,

Using GMpartswiki search engine link, GM# 8616710 comes back as:

Parts Group: 4.158 Gear spacer, trans front unit, internal (applicable to 1956 Oldsmobile "O" HT (Hydramatic Transmission) and 1957 HT (Hydramatic Transmission) applications - just one of many different thickness spacers noted) http://www.gmpartswiki.com/getpage?pageid=2082

The GMpartswiki search only returned one manual - 1961 Oldsmobile P&A Catslog (PA-93) dated Dec 61 and Revised Apr 62 as the lone place this part number was listed.

I will donate the 1000 points to what ever needy cause you deem appropriate. grin

Dan

Last edited by Gdads51; 03/31/2023 4:15 PM.

~ Dan
1951 Chevy 3 window 3100
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