Need help tracking down a rear seal

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floydilian
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Location: Northern California

Need help tracking down a rear seal

Post #1 by floydilian » Wed Feb 21, 2018 12:51 pm

Hiya folks,

I need your help. I've pulled the trans out of my 1965 Comet to do some R&R, and as part of that, replace the rear seal that keeps the trans fluid from coating the underside of the car (which is all gooey).

I purchased the seal, didn't think about it... and when it came time, I realized that the seal that arrived is about twice as thick as the one I pulled out. I went to the local auto parts store and purchased every dang seal that might work...and they are all too big or too small. Argh!

I did some research, and it seems that seal is dependent on the splines on the output shaft. My shaft has 25 splines, which I understand was was maybe a 1964/65 bad idea that Ford later fixed.

Can anyone give me advice on finding the right seal? I've come to the specialists for help I'll put some ID pictures on the seal and trans below.

Thanks!

Image Image Image
1965 Mercury Comet, stock 200 engine, 2.77 3 speed converted to floor shift

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Shorty
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Location: southern Ontario, Canada

Re: Need help tracking down a rear seal

Post #2 by Shorty » Wed Feb 21, 2018 6:04 pm

I have sourced seals for custom or oddball applications through my local tractor parts guy. He sources them from industrial bearing and seal supply companies based on me telling him what size bore it fits in and what size shaft fits through it (O.D and I.D.) and I can also specify single or double lip. Sounds like you need to find a guy like this to get your seal based on size rather than application.
85 F150 on 78 bronco frame C6 np205 welded dana44 front, trussed posi nine inch rear. EFI exhaust manifolds into one 2 1/2" rolls on 35x12.5x15 Maxxis Trepador.

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bubba22349
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Re: Need help tracking down a rear seal

Post #3 by bubba22349 » Wed Feb 21, 2018 6:33 pm

NAPA auto parts should be able to help you get the right seal! But you should also check the condistion of the tail housing bushing and the drives shafts front yoke. If it's looseing that much gear oil under the cars floor then there are other problems beside the oil seal. Good luck :thumbup: :nod:
A bad day Drag Racing is still better than a good day at work!

I am still hunting for a project car to build but with my current low budget it's not looking so good. My Ex- Fleet of Sixes these are all long gone! :bang: 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.

floydilian
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Posts: 14
Joined: Tue Feb 20, 2018 5:21 pm
Location: Northern California

Re: Need help tracking down a rear seal

Post #4 by floydilian » Wed Feb 21, 2018 7:50 pm

Super helpful advice - thank you both. I'll also check the yoke and tail housing bushing - thank you.

I don't know why I didn't check Napa - it looks like they have the right part. I'll post here for later searchers if indeed that is true.

This forum is great! Thanks again.
1965 Mercury Comet, stock 200 engine, 2.77 3 speed converted to floor shift

floydilian
Registered User
Posts: 14
Joined: Tue Feb 20, 2018 5:21 pm
Location: Northern California

Re: Need help tracking down a rear seal

Post #5 by floydilian » Thu Feb 22, 2018 4:05 pm

Hooray! Napa had the right seal, although I had to go there with my dial caliper and check. There were only 2 Napa locations in CA that had the right seal, but luckily one was pretty close.

All installed, and looking good. Thanks all

If any future searcher wants to know, the 25 spline rear seal for a 3 speed top loader is Napa part # NOS 13676: https://www.napaonline.com/en/p/NOS13676

Thanks! I'll be replacing the clutch, etc, and putting the trans back in the car shortly!
1965 Mercury Comet, stock 200 engine, 2.77 3 speed converted to floor shift

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bubba22349
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Location: Flagstaff, Az. 86005 near the old Route 66

Re: Need help tracking down a rear seal

Post #6 by bubba22349 » Fri Feb 23, 2018 11:56 am

:beer: congrats soon you be back on the road enjoying that 65 Comet! Good luck :thumbup: :nod:
A bad day Drag Racing is still better than a good day at work!

I am still hunting for a project car to build but with my current low budget it's not looking so good. My Ex- Fleet of Sixes these are all long gone! :bang: 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.

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