How the devil do you install those rear inner axle felt's that have the small center holes? They don't fit the axle and they will not go into the axle tube.
I haven't tried it yet, but I'd grease it up and use a piece of pipe that will fit over the axle to drive it in. I'll be interested to see what guys who have done the job have to say about it.
I didn't have a pipe that would fit over the axle and into the tube past the rivets so I used a piece of rod and worked the felt in.
I've tried a pipe, a rod and could never see how the heck those were made to go in. The only thing i havn't used is a jackhammer.
Take an old axle,put it in a vise and pre-streach the felt center hole. I use a piece of electrical conduit to jam them into axle housing. Some force is required.
I've found that a little grease, a little force, and a lot of cussing works.
Tyrone, I use a worn out axle shaft to enlarge the hole. Then I oil the felt and put it onto the axle and push the outer edges towards the axle until it will fit into the bearing area then push it past the rivets with a dowel rod. They are difficult to install but they will keep the oil from leaking out.
I use Jacks method. They are the best leak protector I've seen, but a keck of a lot of work to install.
A piece of 11/4" XH pipe is perfect for driving the felts in,it fits over the axle but not too loose and is a good fit to the housing, use a forged steel cap to hammer on as the malleable caps will bend and break.
Those large felts were used by mechanic shops as a quick fix for leaking oil where oil from the rear seal/bushing from the engine leaked past and ran down the torque tube and in to the differential housing filling it up and thence leaking out through the outer axle felts on to the brakes. The real fix was to repair the rear seal/bushing. Differential housings were provided with grease however the trend today is to use oil in the housings therefore leaking oil is a potential issue. There are some good quality modern seals available to resist leakage where oil is used.