[Stewart Way]

No measuring and checking if you do your homework. Set the spare gear up at the shop. Keep the shims with it in the trailer. On a Dana you can spread the case or cool the ring gear, spool and bearings in a cooler of ice, slide it in after the pre setup pinion is installed, blow dry and your good to go. Been a long tine but I think we used to use .004 tight on the carrier bearings and with ice the shrinkage was just enough, Sure you might have to be under the car, but not much longer than with a chunk.