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Old 10-27-2013, 06:37 PM
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twooldgoats twooldgoats is offline
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Join Date: Sep 2002
Location: Tucson, AZ
Posts: 2,886
Default TH400 transmission rear seal leak

I started filling the TH400 in my '60 Catalina and the rear seal started leaking. After crawling under the car, I could see that the transmission yoke (original '60, IIRC) was significantly smaller than the rear seal lip. I don't know why I didn't notice that earlier--I guess I was more concerned about whether the driveshaft yoke splines fit the TH400 output shaft splines (they did). What should the outside dimension of the driveshaft yoke be to fit the rear seal? I measure the existing yoke at 1.688". Anyone know the usual dimension for the yoke? It looks as if I'll have to remove the driveshaft(s) and replace the yoke. I wish I would have noticed it when I had it in for shortening.

Thanks in advance for any info.

Jim

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****'63 Tempest, 475" IAII, Wenzler Super Chief heads, converted to blown alcohol, Birdcatcher, Littlefield 10-71 high helix. Best pass to date: 7.67 @ 181.59 (1/4 mi.), 4.95 @ 143.67 (1/8 mi.), 1.18 (60 ft)

7.75 @ 178 pass:
https://www.youtube.com/watch?v=Iez3...ature=youtu.be

First seven second pass(7.98): https://wwwoutube.com/watch?v=DK17...ature=youtu.be



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