A couple months ago, I decided to pull apart my parking brake since it didn't work and was leaking oil. I found the following problems:
1) leaking oil seal around TC output shaft
2) ridges in drum lining
3) broken bolt on drum backing plate
4) broken speedo gear housing
5) everything gooped up with old silicone
Murphy's motorsports in Warrenton machined the drum lining smooth again. Waterloo motors in Warrenton extracted the broken bolt and installed a 8 x 1.25mm helicoil. American Stripping in Manassas sandblasted and powder coated the drum and backing plate. SOR provided a rebuild kit, oil seal, speedo gear housing, and new nuts/bolts. The shaft that the oil seal goes around was smooth and unmarred, cleaned it up with some 600 grit.
As soon as I get time I will throw it back together, then my neighbor is going to give me a hand taking the top off.
I did get a new toy in the mean time....a John Deere X590 garden tractor! Power/tilt steering, fuel injected, fly-by-wire, digital dash, beer holder, and diff locked...is that crazy or what?