Oil for Columbia rear end

[1stford]

Originally Posted by cdan34

Useing a Colombia in my 34 Ford I prepared for a 500 mile trip. I went from 90 to 140 weight thinking greater protection. Didn't work well, after 50 miles it froze and big disappointment. After analyzing problem and repairs I am now using Valvoline 75-90.
It may also be important to note that I have this rear end in a 34 Cabriolet, 34 5w Coupe both 3:78 and 39 Lincoln Zephyr 4.44 ratios. On top of that I'm using Ford 9 inch axels with splined end gear on all cars.

John Connolly has helped a lot in this process !


Good Luck

Thanks for the info. Do you know if that is a GL-4? When I talked with John and asked him he said 85-140 but did not state if it had to be a GL-4 or not.