The Ford Barn

Brian · 06-25-2018, 12:17 AM

Over the years I've gone through a few driveshaft pins; they shear and you get that familiar [in my case] dink, dink, dink sound. I've machined them up out of various materials; high tensile steel , med tensile, mild steel. Ultimately they all fail. Yes...excellent fit, machine the pin to exactly .250", drive in, pein ends over. Then the splines wear, so that next time you replace the pin, it is taking all the drive, consequently, soon fails.
I've recently built yet another new diff, all new parts, and have just experienced yet another pin failure! I made this pin out of mild steel. OK, my question is; what grade steel should these pins be made of?

06-25-2018, 12:17 AM	#1
Brian Senior Member Join Date: May 2010 Location: Masterton, New Zealand Posts: 4,097	driveshaft pin Over the years I've gone through a few driveshaft pins; they shear and you get that familiar [in my case] dink, dink, dink sound. I've machined them up out of various materials; high tensile steel , med tensile, mild steel. Ultimately they all fail. Yes...excellent fit, machine the pin to exactly .250", drive in, pein ends over. Then the splines wear, so that next time you replace the pin, it is taking all the drive, consequently, soon fails. I've recently built yet another new diff, all new parts, and have just experienced yet another pin failure! I made this pin out of mild steel. OK, my question is; what grade steel should these pins be made of? __________________ Unfortunately, two half wits don't make a whole wit!