59 Diff drain plug size?

[dcody619]

Hey guys,
Does anyone know the rear differential drain plug size for a 1959 1/2 ton 235ci truck? It is missing on my project truck and what should i fill it up with? Would it b possible to clean inside?

[mr48chev]

I've got one out here out of a 55/59 truck that's easy to get to but it's too late an too cold tonight.
I think if you look at the threads, they are fine threads and the plug has a sholder on it and takes a gasket.

Ecklers shows this one for a car http://www.classicchevy.com/chevy-re...1957-1964.html and I think the truck uses the same one but can't guarantee it.

[dcody619]

Originally Posted by mr48chev

I've got one out here out of a 55/59 truck that's easy to get to but it's too late an too cold tonight.
I think if you look at the threads, they are fine threads and the plug has a sholder on it and takes a gasket.

Ecklers shows this one for a car http://www.classicchevy.com/chevy-re...1957-1964.html and I think the truck uses the same one but can't guarantee it.

Thanks! So what do you use for diff fluid?

[dcody619]

Originally Posted by mr48chev

I've got one out here out of a 55/59 truck that's easy to get to but it's too late an too cold tonight.
I think if you look at the threads, they are fine threads and the plug has a sholder on it and takes a gasket.

Ecklers shows this one for a car http://www.classicchevy.com/chevy-re...1957-1964.html and I think the truck uses the same one but can't guarantee it.

Thanks! So what do you use for diff fluid?

[mr48chev]

I looked a while ago and no drain plug on the rear end I have it has the removable cover.

I run 80/90 weight in mine.

I'm pretty sure that if you can figure out the size and thread you can get a drain plug at the local parts house. Especially if they have a set of Dorman cabinets.