This was a mod I was hoping could wait till the spring but....
Ever since I put the 2" drop shackles on the truck theres been this bouncy feeling to the rear, almost as if the tires were egg shaped but I checked the tires and they are fine.
The plan was to install some 2 degree pinion shims since driveline vibrations can sometimes happen after a drop. Since I no longer have my friends garage to work in since he moved I had to take it to my mechanics. After the truck was up on the lift for a few minutes we found that the pinion angle is only off by 0.5 degrees so no need for the shims. He said he would put them on but that would not solve the issue. He suggested we take the rear diff cover off and look inside, no charge for the look or fluid refill.
Good thing we checked, the spider gears were all pitted and one of the cap bearings was cracked in 3 places and had almost 3/8" of play. I asked if it would last till spring and he said it could go another 10000Kms or it could go on your drive home.
So after thinking how big a hit to the wallet this is to fix now or to fix later if it breaks while driving I said ok lets fix it.
Bye bye open diff and 3.08 gears and hello TruTrac LS and 3.73 gears.
Only thing is there was no clocking gear for the ABS so now I am without RWABS but I can live with that. Now all I need is to get a new speedo gear cuz its waaayy off. I tried that link that Skrwz posted in another thread and gave them a call but I still need to know whether I have the 7 or 8 tooth drive gear and seems the only way to check is to take it apart. I tried but I couldn't get it out. I have to go back to the mechanics on Friday to let him check over the rear diff to make sure things are still ok.
One thing I found is that when you let off the gas and coast you can hear the
rear whine. He said because its gear driven there will be some whine. I'll get more info on that next week.