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

differential vent

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Old Mar 23, 2021 | 04:53 PM
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differential vent

How do i check if vent is working? Was pretty grimed over. I clean it up and now the dome top spins. I just replaced pinion seal, i wonder if the vent caused it to leak. Maybe I can blow air in fill hole and see if air comes out, maybe put soap over dome.
 
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Old Mar 23, 2021 | 06:04 PM
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IIRC, the vent unscrews from the housing like any brass fitting. You should be able to remove it and clean it and make sure it breathes properly. Later vents were just a fitting with a rubber hose attached that just terminated into open air in the frame rail or crossmember.
 
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Old Mar 24, 2021 | 06:36 AM
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The vent on the Dana 41 and early 44’s is a press fit into the housing. On the inside, there is a tang on the casting that keeps oil splash inside. You might be able to sneak a really small bottle brush up in that cavity to dislodged any sludge that is blocking it. Or a good jet of brake cleaner. That will require a thorough cleaning of the chunk to rid any grit that could get into the bearings.

JB
 
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Old Mar 24, 2021 | 05:26 PM
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Suck on it and see if it's clear or plugged up. Don't blow air into it, and blow any crap that may be in it into the housing.
 
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