Tractor powered brick maker - GIF

[hemmjo]

spinning back and forth a little bit unless you're driving perfectly straight.

Spinning back and forth a little bit is totally different than, getting stuck and spinning one wheel trying to get out, OR by seeing how long a black strip you can lay down on some road, OR, jacking up one wheel and driving some load with that while the other is held stationary. The bearing surfaces on Spider gears are not designed for constant motion. I know for a fact that one wheel spinning with a open type differential will ruin a differential. I know this from personal experience in regard to "The last differential I had apart was a 1960 Chevy"

This is a custom seat cutter my dad had made in 1966 to reface the spider gear thrust surfaces in my Chevy. My dad was a machinist. He taught me how to measure the radius required and had this tool ground from an old milling cutter where he worked. I will probably never use it again, but it has a special place on my tooling shelf. That cutter taught me many important lessons. I am reminded of them every time I see it.


The differential case was scored from the spider gears spinning too much. We got new spider gears shaft and shims. My dad taught me how to set the backlash for gears. We used the reamer to set that lash.

The danger is real. You can find information about the issue. I found this for your perusal. https://www.subaruoutback.org/thread...e-gears.46819/

Spider gears will last longer than you car, or tractor, unless you abuse them. Locking one wheel and turning the other under some load, like that clay extruder, is not how they were designed to be used.