So the t case had a bad idler shaft. The helical cut gear was where the bad wear was. So I filled In the shaft splines with a hardened stainless rod and re machined it. That stainless s@#t is tough stuff. I'm putting the re machined splines in the straight cut gear. That gears seems to just Hum when driving. Looks like the helical gear took alot more abuse. So by flipping the shaft, problem solved. Took 50 years to get this way..figured I'll be 70 by the time it's that bad Again. Annnnd my buddy's say I'm crazy for fixing that. Pfffff.