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Old May 24, 2017 | 12:50 PM
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jag3rd's Avatar
jag3rd
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Default gear sleeve
what size is the o-ring that goes around the speedometer gear sleeve for a 78 automatic?
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Old May 24, 2017 | 02:48 PM
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Not sure on size, but available at:

For TH350 and Manual:

http://www.ecklerscorvette.com/corve...n-1965-19.html

For TH400:

http://www.ecklerscorvette.com/corve...1968-1976.html

https://corvetteparts.com/item/seal-...0thm-1968-1978

Also at O'Reilly: http://www.oreillyauto.com/site/c/de...smission+parts

You'll need to know your transmission - or bring the old o-ring along. I bet any of the regular auto stores carry or can order.
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