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I recently went though a bunch of work that started out just to replace a U-Joint. As one thing leads to another, I now have the trans out on the floor, about to replace my clutch and pressure plate.

When I loosened the bolts and let the pressure plate drop, this washer fell out. It’s slightly concaved and has a “felt looking” backing. The hole fits perfectly over the end of the transmission shaft. Any idea what it’s for? Which way it should go when I put it all back together?
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IMG_2918.png (2.19 MB, 260 downloads)
IMG_2917.jpeg (340.27 KB, 259 downloads)

Last edited by Dltalfa; 07/09/2023 11:24 PM.

Care taker of a 1946 1/2 ton. Pretty much period correct original. Danny T, from B’ham, Al
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Guessing. Its a grease cover for the clutch pilot bearing/bushing.


~ BD.
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It doesn't belong in there. It's probably some ones idea of a seal if they may have had excess oil on the clutch.
There is no front seal in those transmissions. They rely on an oil slinger which is part of the nut that retains
the front bearing. There is a close tolerance between the inside of the bearing retainer that the release bearing
slides on and the slinger. If both are damaged or excessively worn oil will move out instead of returning to the case.
Fred


1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine
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Originally Posted by rfs56trk
If both are damaged or excessively worn oil will move out instead of returning to the case.

... or if you park your truck on a severe front end down hill.


'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
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Originally Posted by rfs56trk
It doesn't belong in there. It's probably some ones idea of a seal if they may have had excess oil on the clutch.
There is no front seal in those transmissions. They rely on an oil slinger which is part of the nut that retains
the front bearing. There is a close tolerance between the inside of the bearing retainer that the release bearing
slides on and the slinger. If both are damaged or excessively worn oil will move out instead of returning to the case.
Fred

Thanks rfs56trk. I knew I had never seen a washer inside a clutch assembly before. But I don’t see how this would have been an oil leak deterrent. It will only slide over the very end of the transmission output shaft, the part that goes inside the pilot bushing. There is no oil in that area, is there?


Care taker of a 1946 1/2 ton. Pretty much period correct original. Danny T, from B’ham, Al
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Was there a pilot bushing you removed? Don't see it the pile of parts?


BC
1960 Chevy C10 driver 261 T5 4.10 dana 44 power loc
1949 GMC 250 project in waiting
1960 C60 pasture art
Retired GM dealer tech. 1980 - 2022
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Originally Posted by BC59
Was there a pilot bushing you removed? Don't see it the pile of parts?

I haven’t removed the pilot bushing yet. I’m considering removing the flywheel to have it resurfaced᠁..although it doesn’t show any signs of heat check or discoloration. In fact, the clutch disk and pressure plate look fairly new, with now visible wear. I’m thinking it all might have been done in the recent past᠁..or at least with minimal miles since replacement.

Anyway, I plan on removing the pilot bushing when I remove the flywheel. I just ran out of time when I removed the clutch, (weekend warrior you know).

Last edited by Dltalfa; 07/10/2023 11:24 PM.

Care taker of a 1946 1/2 ton. Pretty much period correct original. Danny T, from B’ham, Al
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A picture of the back end of the crankshaft would be helpfully.


BC
1960 Chevy C10 driver 261 T5 4.10 dana 44 power loc
1949 GMC 250 project in waiting
1960 C60 pasture art
Retired GM dealer tech. 1980 - 2022
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Originally Posted by BC59
A picture of the back end of the crankshaft would be helpfully.

I’ll grab a picture of the end of the crankshaft as soon as I can get back in the garage. But it doesn’t show any unusual signs or anything that would relate to the washer᠁.at least not visually.


Care taker of a 1946 1/2 ton. Pretty much period correct original. Danny T, from B’ham, Al
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I put a sealed bearing on the front of my 39 3-speed transmission when I rebuilt it. I removed the inside seal of the bearing so the bearing would still be lubricated from the trans side. Curious, did you finally move the rearend/torque tube back to get the trans out?

Rick


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Originally Posted by rickmg
I put a sealed bearing on the front of my 39 3-speed transmission when I rebuilt it. I removed the inside seal of the bearing so the bearing would still be lubricated from the trans side. Curious, did you finally move the rearend/torque tube back to get the trans out?

Rick

yes, I ended up having to remove the rearend U-Bolts and roll the whole torque tube back to get the u-joint and transmission separated. Luckily, the rubber flex line on the brakes had enough slack so I didn’t have to dismantle the brake line. You never know what you’re going to find in these old vehicles.

I sure appreciate everyone’s help and input!!


Care taker of a 1946 1/2 ton. Pretty much period correct original. Danny T, from B’ham, Al
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Originally Posted by BC59
A picture of the back end of the crankshaft would be helpfully.

Here is a picture of the end of the crank, with pilot bushing and flywheel still in place.
Attachments
IMG_2931.jpeg (377.36 KB, 112 downloads)


Care taker of a 1946 1/2 ton. Pretty much period correct original. Danny T, from B’ham, Al
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What does the flywheel surface look like?


Mike
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Originally Posted by Dragsix
What does the flywheel surface look like?

They fly wheel visually looks great. No scaring and no signs of heat checking, (the rainbow color effect). It looks good, visually. However, I was always told to spend the extra few dollars and always replace the clutch, pressure plate, throw out bearing, pilot bushing and turn the flywheel EVERY time you pull a transmission.


Care taker of a 1946 1/2 ton. Pretty much period correct original. Danny T, from B’ham, Al
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You have a very beautiful clutch fork
Mine are much more worn out than the one you posted a photo of
I’ve been hoping to one day weld one of mine up and machine it to the proper size finger where it rides on the release bearing.
I’m so envious smile
-s

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Originally Posted by 2ManyTrucks
You have a very beautiful clutch fork
Mine are much more worn out than the one you posted a photo of
I’ve been hoping to one day weld one of mine up and machine it to the proper size finger where it rides on the release bearing.
I’m so envious smile
-s

LOL..sounds like a weird Car Nuts pickup line, “has anyone ever told you, you have a very beautiful clutch fork”? 🤣


Care taker of a 1946 1/2 ton. Pretty much period correct original. Danny T, from B’ham, Al

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