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#1494678 Fri Mar 31 2023 03:46 PM
Joined: Jan 2014
Posts: 3,137
JW51 Offline OP
I don’t have a pic handy. A couple metal rings that were shipped a “bonus item” with something else I bought off eBay.

I can’t think of what they would be, nor find anything with that part number. Maybe some type of bezel?

1000 internet points to the first to identify them.

JW51 #1494682 Fri Mar 31 2023 04:15 PM
Joined: Sep 2009
Posts: 3,602
Gearhead, Moderator for The Swap Meet and General Truck Talk

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)

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


Last edited by Gdads51; Fri Mar 31 2023 04:15 PM.


1951 Chevy 3 window 3100 (My Grandpa's hunting truck)
1966 Chevelle (Wife's Hot Rod)
2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998)
Com Fac Maint Lead Tech Retired (1998-2021)

Finally time to get to work on my Grandpa's (now mine) truck!
JW51 #1494685 Fri Mar 31 2023 04:16 PM
Joined: Jan 2023
Posts: 89
A quick search, and this is all I could pic, or desription other than a GM spacer


1958 3100 Fleetside w/235 4spd
JW51 #1494686 Fri Mar 31 2023 04:34 PM
Joined: Jan 2014
Posts: 3,137
JW51 Offline OP
Perfect! Always wanted a 56-57 Olds Hydramatic gear spacer!

Moderated by  klhansen, Rusty Rod 

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