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1948 - 1956 F1, F100 & Larger F-Series Trucks Discuss the Fat Fendered and Classic Ford Trucks

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Old 09-09-2013, 01:33 PM
1950F2 1950F2 is offline
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1950 F2 4 speed

I have a question on the lube level inside the trans. (4 speed in a 1950 f2)

If you fill it too full, will it leak out seals?? I filled up to top hole on side.

It was not leaking but when I drained and put new in it started to leak at the seals on both ends.

Where is a place to get seals ??
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Old 09-09-2013, 02:47 PM
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The Shop Manual says it takes 5 pints of fluid.
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Old 09-09-2013, 03:57 PM
f5fordgirl f5fordgirl is offline
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Probebly it still had the old style 85-140, thick as tar, if you put the new 85-140, or 85-90, or thinner back in, it will leak faster. But the seals may be orig, hard and maby cracked. If you have the old ones out, napa can get new ones.
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Old 09-09-2013, 07:48 PM
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Likely you had a leaky transmission before you changed fluid. The level had probably leaked down below the seals long ago. You topped it up and found the leaks again.

If you over filled the transmission it will do exactly as you describe. Did you fill untill the fluid was level with the bottom of the hole, or did you fill untill fluid was running back out of the hole then quickly put the plug back in?

The seal at the back of the transmission isn't too bad to replace. You have to pull the u-joint assembly off the transmission splines, dig the old seal out of the bearing retainer, and very carefully press the new seal in (I usually use a big hammer, a really big washer and a bit of pipe; tap gently). Reverse for reassembly.

Are you sure it is leaking out the transmission input too? If you changed motor oil at the same time you changed transmission oil, you may have found an engine rear main seal leak.
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Old 09-10-2013, 08:05 AM
1950F2 1950F2 is offline
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38 coupe, thanks for the info.
Yes it is leaking in front too. Engine is out and I can see oil on the bell housing bottom.

I guess I better pull old seals out fix before I put motor back in.That would mess up new clutch and all..
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Old 09-11-2013, 07:21 PM
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If you have the engine out, you should probably rebuilt the transmission at the same time. It isn't that big of a job. The trick to help reduce the front leak is to replace the front bearing during the rebuild. Get a bearing that is sealed on one side and open on the other. Put the open side toward the gears for lubrication. The sealed side will help keep gear lube from running past the bearing.
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Old 09-11-2013, 07:21 PM
 
 
 
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