Adding Rear end gear oil

[modeladan]

I have a 1930 Spt-cpe that has been setting for 40 years, the oil in the rear is low and I am wondering if I should drain it and refill or just top it off.. there is a little residue on the outside.

Same thing on the trans,it is low to empty.

 

[1931 flamingo]

I would drain them both, let drain o/night. Wipe the cases good on the outside and refill. Many recent threads on what to use to re-fill.
Paul in CT

 

[modeladan]

Do you think I could or should flush and drain?

 

[1931 flamingo]

Certainly can't hurt. I believe old timers used to use kerosene, but then drain good.
Paul in CT

 

[Louis]

Good advice Paul .

 

[Jim Brierley]

Diesel fuel works good as a flushing medium too. Drain when hot for max effect.

 

[modeladan]

Thanks !!