Posted by Vaughn on September 19, 2000 at 21:13:42:
In Reply to: Differences in WC 1/2 ton, WC 3/4 ton & M37 differentials? posted by Brian in Oregon on September 18, 2000 at 00:14:36:
The 1/2 ton and some early 3/4's used the 8&3/4 ring gear
They are not as strong as the 9&5/8 ring gear. You can interchange between the two, but you'll need Zentmyer's power train interchanges in order to perform the required modifications to differential carrier. I would look for 4.89's for the M37 or if you want better gearing, a set of 4.30's, or 4.10's or 3.91's for your 8&3/4, just keep in mind, it will be a weaker unit.