I pulled the engine and gearbox of my '38 SS to investigate and repair the gearbox, which is noisy in all gears but 4th. We got snow today, October 30 is way too early for snow in Chicago, but anyway I brought the gearbox inside to start in on it.
First surprise, why are 2nd and 3rd teeth going opposite directions?
Second surprise, I was expecting the counter shaft to have bushings.
It has needle bearings.
There are a couple of damaged screw heads, and shim stock behind the front roller bearing to move it rearwards a bit. Somebody has been in here before me.
Good news is I found something definite, some wear on the counter shaft from the needle bearings.
Counter shaft measures .9800" all other places, but .9785" at these worn places, worn on the top.
So, did somebody replace the whole box, or just the counter shaft bushings, or some other alternative?
Trying to figure out how I can identify this box. There is a serial number 1549 on the top cover. No prefix or suffix letters, though I suppose there wouldn’t be with a double helical.
No other part numbers that I can find.
A number SGK-80 on the side of the case.
More disassembly and measurements tomorrow.