Hi all.
My second post here. My wife says I spend too much time reading here, but hey, there's so much to learn!
I bought a 1950 3/4 ton pickup recently that went through a number of previous owners, so there's plenty of surprises.
My latest surprise ... I thought the 14 bolt rear was original, but after a thorough inspection it appears it may have been changed. My first clue was the pass side shock mount is in the wrong position! I did a quick ratio calc (raise the rear, turn each wheel one revolution, count the driveshaft revolutions) and I come up with 3.2 driveshaft revolutions. I did it 6 times, and 6 times it came up 3.2.
Can anyone help me ID this diff and gear ratio? Does the 3.2 sound correct?
I got some casting numbers off the pumpkin (driver side front of pumpkin).
After wire wheeling it looks like:
CTD
120
3877323
I can't seem to find a differential casting reference on the internet, so any help would be appreciated.
I know I still have to pull the cover and check the teeth, etc, but I'm not planning to do that just yet. Too many other truck-related projects going on at the moment!
Thanks in advance!
50-3600-Guy
