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1962 4 speed mystery part?
Posted by: irfgt ()
Date: December 27, 2017 12:51PM

I recently disassembled my 4 speed transmission to replace the 3/4 syncro and found a washer between the 3/4 syncro and 3rd gear. it appears to have been there all along but cannot find reference for it anywhere. Here is a mainshaft picture from chevy and does not show anything except the blocker ring. Anyone else ever seen this?



Edited 2 time(s). Last edit at 12/27/2017 01:08PM by MattNall.

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Re: 1962 4 speed mystery part?
Posted by: vairchet ()
Date: December 27, 2017 06:03PM

Here ya go: Information concerning thrust washer on '61 to '63 4-speed 3rd gear. '64 to '65 did not use washer.

Chet in Ramona

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Re: 1962 4 speed mystery part?
Posted by: caroseiii ()
Date: December 27, 2017 07:10PM

That discrepancy is because the diagram is for a 1961 four speed and the thrust washer third gear was introduced in 1962. The 1961 used a different, thicker third gear. The revised third gear was thinner and incorporated a thrust washer. I thought it was such a good idea, I added a second gear thrust washer between second and the 1-2 synchro!

Crawford Rose

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Re: 1962 4 speed mystery part?
Posted by: vairchet ()
Date: December 27, 2017 10:53PM

Information concerning third gear production modifications:

Chet in Ramona

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Re: 1962 4 speed mystery part?
Posted by: Seth Emerson ()
Date: December 27, 2017 10:58PM

Nice Work, Chet!

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Re: 1962 4 speed mystery part?
Posted by: irfgt ()
Date: December 28, 2017 02:50AM

Good work guys. I had never read this bulletin. At least this lets me know I'm not crazy and am putting the right stuff back in my transmission. Thanks again!

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