[John408]

Hey guys, I just picked up a rebuilt sm465 and I looked inside where the shifter goes and it was red so I took the top cover off and it was painted red inside. It this ok? Won’t the paint come off and get into the bearings and stuff and screw something up over time? When I was trying to put the top cover back on the paint was chipping off. Also when I had the top cover off I noticed the Teflon coating is coming off of the shift forks, is there a fix a transmission shop can do, i’m just concerned that the cracked apart parts is going to act like a metal shaving and where grooves into things. Thanks guys

 

[Keith_J]

Paint or powder coat? Gear lube is chemically active and cast iron cases can corrode internally. Paint or powder coat can extend lubricant life. Manual gear boxes don't have the heat of engine oil unless overfilled. At cruise speed, very little gear to oil contact happens, just enough to sling it where needed. Recall that Lucas Oil advertising gear device.
Shift fork wear looks like assembly caused.

 

[roadhog0]

Paint inside is not all that uncommon. I would not worry about it.