How To: C15a Wire-3 restoration

[rob love]

Originally Posted by Jordan Baker

I haven’t looked that far ahead yet for what oil I’ll use. My Willys MB seems to like the 80/90 transmission hypoid oils.

Not all hypoid oils are the same. The most current spec of hypoid is GL4 edited to add: now GL5) which is reported as harmful to brass. Not a problem for your Chevy crash box, but any transmission with synchro rings may not have a happy ending.

What belongs in those is GL1 or possibly GL3 specification. Tough to find...ask any Dodge Diesel owner with a manual transmission. I ended up using royal purple.....expensive, but cheaper than removing and repairing the transmission.

Bob: I always considered the oil leaks on a chevy quite standard. Many of them here at the museum feature multiple drain pans underneath them.