'41 110 Lubrication Questions

Posted by Ragtime Kid On 2015/9/30 16:06:17

I had my transmission totally rebuilt with NOS parts and it now shifts beautifully. It took a lot of adjustment on the column shifter rods to get it so you could go from first to second without touching reverse and getting the dreaded grind.

After a few such events, I decided it would be a good idea (given the occasional grinding and all the new gears and parts) to drain and replace the tranny fluid after a few hundred miles.

The person who rebuilt it for me no longer works at the transmission shop and I can't get hold of him to find out what gear oil he used in it. The manual says straight SAE 140. so I used StaLube API/GL-4 SAE 140Hypoid gear oil.

Would I be better off running 85W90 gear oil particularly now that winter is coming on? Temps where I live will range between 30-50 degrees.

Also, I don't think the differential oil has been checked or replaced in at least 10 years. What should I put in there and would it make sense to flush out with kerosene first?

THanks!!