Why is this so dang hard?

TrailBeast said

I have jumped on this 7.25 enough to spin one for 100 yards, snap off a shock eyelet and then twist a driveline in half a different time and it hasn't blown.
Don't know why.

That reminds me that I need to tie some leafs together when I have it apart.

Click to expand...

Well then pull the cover and inspect the crosspin/saddles. If all good, put it back together and run with it. It's not the 7000 rpm peglegs that kill it. It's the boiling oil and/or sudden slip/stops that hammer the spiders, the pin, and eventually egg-out the saddles. then the retainer pin takes the load... until it doesn't. Then pow the crosspin goes out the back..... if yur lucky. If not then it all locks up and now yur in for the ride of yur life.......

Course that happens with an open 8.25 almost as easy,lol.

Wait there's an even easier test; With the parkbrake set, slide under there and rotate the driveshaft as far one way as it goes, then go the other way. Count the resistance stack-ups. First the pinion will take up the ring-gear lash. next the spiders will crawl up the side gears,and force them to move out and away from the spiders, then the crosspin will walk to the other side of the egg, and finally the case will rotate, until the slack in the splines gets taken up by the locked brakes.
On second thought, don't do this test; you don't want to see/feel all that....... Plus sometimes it makes horrible noises.