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Old 05-25-2016, 12:19 AM   #1
oldblue1968chevy
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3spd transmission "bullet" seals

Hey folks. I've got a 1968 3spd manual transmission that's leaking oil from the speedo cable. I've been told it's the seals on the bullet.

I've removed the bullet it has an oring and a funny seal on the end that is apparently missing. I've called every autopsies store around and done a thorough search online. Some info for th350/th400 etc Trans but no love for the manuals.

Like I said I'm in need of seals or a new bullet for a 3spd manual transmission. Also, what should I be inspecting on the plastick speedometer gear?

Thanks
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Old 05-25-2016, 08:25 AM   #2
Jason Banks
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Re: 3spd transmission "bullet" seals

I'm no expert. But, I am pretty sure the bullet used on the 3spd and the TH350 are the same, and probably use the same seals. It has been a while since I looked at fixing this leak, but, my memory is of only the o-ring.
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Old 05-25-2016, 09:36 AM   #3
Wrenchbender Ret
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Re: 3spd transmission "bullet" seals

I could never find a replacement for the seal but a new bullet is available w/seals from some specialty suppliers or probably a trans shop. I have a new one if you can't find one locally.
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Old 05-25-2016, 10:08 AM   #4
ga-stepside
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Re: 3spd transmission "bullet" seals

I just went through that on my th350. Found this on Ebay for less than $8 delivered.
http://www.ebay.com/itm/271982472578...%3AMEBIDX%3AIT
I saw the o-rig and seal also on Ebay for the 3 speed.
http://www.ebay.com/itm/Speedometer-...5USTzA&vxp=mtr
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Old 05-25-2016, 11:42 AM   #5
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Re: 3spd transmission "bullet" seals

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Old 05-25-2016, 12:32 PM   #6
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Re: 3spd transmission "bullet" seals

Thanks GA stepside I just ordered the ones from eBay for $7 and change
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Old 05-27-2016, 11:48 PM   #7
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Re: 3spd transmission "bullet" seals

Alright guys. The eBay seal kit came in today..

The original seemed to be a direct replacement. The seal on the other hand is too large (if it goes in the end of the bullet). When I took it apart there was no seal in the bullet just a gear and an o ring.

Someone correct me if I'm wrong but the small seal should press into the bullet correct?
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Old 05-28-2016, 06:34 AM   #8
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Re: 3spd transmission "bullet" seals

Flip the bullet over. The seal presses into the threaded end not the pointy end. The yellow side of the seal goes outward when installed.

I'd bet money the bullet already has a seal in it if you flip it over and look. That guy on ebay includes an extra seal in the auction (some guys press the second seal in on top of the other seal for redundancy). I ordered one from the same place in the past.
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Old 05-28-2016, 07:40 AM   #9
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Re: 3spd transmission "bullet" seals

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Old 05-28-2016, 09:21 AM   #10
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Re: 3spd transmission "bullet" seals

My bad. I was tired when I took pics yesterday
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http://67-72chevytrucks.com/vboard/s...d.php?t=317684

Grams 53-1953 Chevrolet Belair
http://67-72chevytrucks.com/vboard/s...=1#post4327784

1969 Chevy C10 Shortbed 4.5/6?" Frame off resto
http://67-72chevytrucks.com/vboard/s...d.php?t=548136

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Old 05-28-2016, 09:41 AM   #11
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Re: 3spd transmission "bullet" seals

This is the one I plan on replacing mine with in my 4 speed Saginaw. Should work in th350's and most Saginaws.
http://www.ebay.com/itm/141419389064...%3AMEBIDX%3AIT
Not the different size opening where the seal goes.
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Old 08-18-2018, 10:25 AM   #12
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Re: 3spd transmission "bullet" seals

Quote:
Originally Posted by jjzepplin View Post
This is the one I plan on replacing mine with in my 4 speed Saginaw. Should work in th350's and most Saginaws.
http://www.ebay.com/itm/141419389064...%3AMEBIDX%3AIT
Not the different size opening where the seal goes.
I ended up getting this and it worked perfect. Just slipped right in and has extra seals that come with it.
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72 Blazer 2wd conversion project "No Daggum Money" http://67-72chevytrucks.com/vboard/s...d.php?t=550804 LS1-T56 3.73 LSD super budget build
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Old 06-10-2016, 12:24 AM   #13
oldblue1968chevy
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Re: 3spd transmission "bullet" seals

Still looking...bump
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Goose-1968 C10 355,9.32-1CR, Vortec Heads ,262 voodoo, 3.73:1 3OTT (HS ride/beater/farm truck)
http://67-72chevytrucks.com/vboard/s...d.php?t=317684

Grams 53-1953 Chevrolet Belair
http://67-72chevytrucks.com/vboard/s...=1#post4327784

1969 Chevy C10 Shortbed 4.5/6?" Frame off resto
http://67-72chevytrucks.com/vboard/s...d.php?t=548136

1999 Toyota Tacoma 4x4
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Old 06-10-2016, 06:52 AM   #14
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Re: 3spd transmission "bullet" seals



Summit $1.97 http://www.summitracing.com/parts/atp-so34

RockAuto $1.13 http://www.rockauto.com/en/parts/atp...nion+seal,8652

O'Reilly $1.69 http://www.oreillyauto.com/site/c/de...&keyword=so-34
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Old 08-18-2018, 06:12 PM   #15
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Re: 3spd transmission "bullet" seals

Good info here
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Old 08-18-2018, 06:47 PM   #16
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Re: 3spd transmission "bullet" seals

There is a company in California, I think classic transmissions, that has the seals you seek. I am presently on vacation or I would look in the garage. I purchased seals for a 200-4R which are slightly larger than most and it worked perfectly.
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