Originally Posted by FroggyFatBoy
I have a inner primary seal leaking and i thought i read somewhere through this vast website about a updated one piece bearing being installed for the inner race walking on the shaft. my question is, what years and models does that apply to ? would my 07 FB need a updated bearing or is it just a seal gone bad ? TIA..
If you are going in to replace the inner primary seal, you really should replace the inner primary bearing, 5th gear/mainshaft seal, quad seal and spacer and mainshaft seal. Can't tell you how many guys have had the inner primary on/off multiple times chasing an inner primary leak. There are three fixes for the inner primary bearing:
1. replace bearing race & bearing with HD oem set.
2. replace bearing with HD oem & replace race with non-walking S&S race.
3. replace separate bearing & race with one-piece sealed bearing/race upgrade from All Balls or Baker.
Option #2 is my personal favorite. I can't speak from experience but have read that there have been issues with the one piece sealed bearings; hit/miss solution from what I hear and read.
It is very easy to nick the inner primary bearing seal when installing; the splines on the mainshaft have very sharp edges. The inner primary bearing puller shaft comes with a plastic netting to protect the threads, I slip that over the mainshaft to protect the seal when installing the innner primary case; duct tape works as well.