I will be getting a complete rear axle from a local wreckers to replace my existing one, but was just thinking after reading in the service manual about marking the pinion flanges when removing the drive shaft so that it can be installed the same way etc...

Well, obviously with a replacement axle, there won't be any way to know what the best way to attach the driveshaft to the new axle. I guess I'm looking for pointers on how to know all is ok and not out of balance and possibly destroying the pinion seal on the replacement axle from things being slightly off balance or something..

Can't get a straight answer from previous owner on whether or not the rear end had been completely replaced already and maybe thats what caused the pinion seal to go (slight vibration or something from out of balances)and there is no tag on the pumpkin of this one at the moment, so I got info from the dealership using the VIN to find out the type of rear it is...or supposed to be anyways...lol. Its supposed to be a 3.92 with LSD...but don't know for certain if it is indeed that.