The Ford Barn

Admiral · 06-26-2021, 04:57 PM

I just finished assembling an R-10 overdrive unit and accompanying three-speed manual transmission for my 1951 Ford. Other than needing three sets of hands, the build went well... at least I think it did.

Now that the overdrive unit is together (along with the transmission), I can't seem to turn it by hand. Does it take an inordinate amount of force to turn the main-drive gear through the overdrive and out? It feels locked up and I don't want to force it. I've tried it in various gears, with the manual lockout engaged and disengaged, I've tipped the whole unit one way and then the next to ensure the pawl slides into and out of engagement but I still can't tell if something is wrong. Is there a common thing to miss when assembling these units?

For this build, I cleaned and inspected all the parts and everything looked very good and moved/engaged smoothly. I also installed a new ball and roller bearings, new blocker rings and synchro parts, a new main shaft and a new main-drive gear.

06-26-2021, 04:57 PM	#1
Admiral Senior Member Join Date: Jul 2011 Location: Oakland County, Michigan Posts: 562	BorgWarner R-10 Overdrive Rebuild I just finished assembling an R-10 overdrive unit and accompanying three-speed manual transmission for my 1951 Ford. Other than needing three sets of hands, the build went well... at least I think it did. Now that the overdrive unit is together (along with the transmission), I can't seem to turn it by hand. Does it take an inordinate amount of force to turn the main-drive gear through the overdrive and out? It feels locked up and I don't want to force it. I've tried it in various gears, with the manual lockout engaged and disengaged, I've tipped the whole unit one way and then the next to ensure the pawl slides into and out of engagement but I still can't tell if something is wrong. Is there a common thing to miss when assembling these units? For this build, I cleaned and inspected all the parts and everything looked very good and moved/engaged smoothly. I also installed a new ball and roller bearings, new blocker rings and synchro parts, a new main shaft and a new main-drive gear.