Hello,

I bought a 1954 GMC 3100. I took out every bolt there was and last week I received my rebuild chassis.
The first project is to paint the rear axle and to clean the differential and put new oil in it.
I have 2 questions:

- There is a hole in the rear axle. Is this normal? Will this be a problem?
- I opened up the rear of the differential. The oil is very thick and dirty.
How do I clean the inside of the differential before I put in new oil? I don't want to take the whole thing apart.
- I want to take off the front of the differential. I removed all 10 bolts. But I don't get it off.
Do I need to undo the bolt in the U-join?

Thank you very much!

Last edited by rolf_gemini; 12/21/2018 10:56 AM.