So, a sheared spring pin wound up with my axle fully disassembled and scattered across the shop with a wheeling trip on Saturday morning 
Steering was acting funny -- Turn right the wheel was crooked, turn left the wheel was straight, seen that before, sheared spring pin / loose u-bolts. Was both this time. Fixed that, and discovered that my caliper on the driver's side was seized up. Took it off, got it moving again, re-installed and figured I'd check the other side since calipers usually seem to seize in pairs.
Pulled the other tire off and whaddya know, it's seized too. Pry it off, and notice the rotor is able to rotate. Truck is in 4x4, both hubs locked, one tire on the ground, hmmm... Sure enough, my u-joint is missing a cap and the axle shaft ears are all messed up. So, off comes the rotor / backing plate / spindle, and out comes destroyed axle shaft. Oh great, the splines at the end are sheared off
So, off comes the driver's side tire, out comes that axle shaft as well. Try to push a broom stick through the carrier to push the other half of the busted axle out. Hit something solid, push on it for a while, then it hits me, cross pin
So, off comes the diff cover, and with that comes quite the discovery, winds up this axle has a powertrax locker in it woohoo! Pull the cross pin, and get the other chunk of axle shaft out. Go to install the new axle shaft, and it just spins inside the carrier... Crap! So, out comes the carrier to investigate, and winds up the axle is a 30 spline 10 bolt. Cool, but sucks that my spare axle shafts are all 28 spline
So, replace the axle seals and back in goes the carrier along with all the driver's side stuff, but now I gotta try and find a pass side axleshaft tomorrow at a wrecking yard and rebuild / install it before I gotta haul my truck off to the offroad park on Friday evening.
So much for an easy fix of just replacing a busted spring centering pin!

Steering was acting funny -- Turn right the wheel was crooked, turn left the wheel was straight, seen that before, sheared spring pin / loose u-bolts. Was both this time. Fixed that, and discovered that my caliper on the driver's side was seized up. Took it off, got it moving again, re-installed and figured I'd check the other side since calipers usually seem to seize in pairs.
Pulled the other tire off and whaddya know, it's seized too. Pry it off, and notice the rotor is able to rotate. Truck is in 4x4, both hubs locked, one tire on the ground, hmmm... Sure enough, my u-joint is missing a cap and the axle shaft ears are all messed up. So, off comes the rotor / backing plate / spindle, and out comes destroyed axle shaft. Oh great, the splines at the end are sheared off

So, off comes the driver's side tire, out comes that axle shaft as well. Try to push a broom stick through the carrier to push the other half of the busted axle out. Hit something solid, push on it for a while, then it hits me, cross pin

So, off comes the diff cover, and with that comes quite the discovery, winds up this axle has a powertrax locker in it woohoo! Pull the cross pin, and get the other chunk of axle shaft out. Go to install the new axle shaft, and it just spins inside the carrier... Crap! So, out comes the carrier to investigate, and winds up the axle is a 30 spline 10 bolt. Cool, but sucks that my spare axle shafts are all 28 spline

So, replace the axle seals and back in goes the carrier along with all the driver's side stuff, but now I gotta try and find a pass side axleshaft tomorrow at a wrecking yard and rebuild / install it before I gotta haul my truck off to the offroad park on Friday evening.
So much for an easy fix of just replacing a busted spring centering pin!


Also got my rear brakes working -- Holy stiff brake pedal / super sensitive brakes batman!