1947 R9 Overdrive

Posted by Philip On 2015/8/10 8:01:49

I have a 1947 Packard super Clipper that has a R9 overdrive. It needs planetary gear needle bearings and shafts replaced. I was wondering if the 3 Planetary gear set in the R9 can be replaced with the 4 Gear set from the R11 Overdrive? I understand that they are stronger and they look the same except for the extra gear. Was also wondering where to get internal parts for the overdrive.