I would have the gear professionally installed. If it's not done right it could be pretty exspensive. I would go to a ring and pinion shop, they'll be cheaper, quicker, and do it right. I would expect to pay from $150-$300.
Ok, then you're lucky. There isn't any instructions that I know of. I would however suggest getting a shop manual for your car. You could also get the torque specs. too. Just buy a chilton manual for $30.00 and that should suffice.
Virtually all rears are built alike. Except when you get to planetarys. No you don't need to drop the rear. Did you buy the install kit with the bearings annd schims? If not I suggest that you get one of these right away. I changed my bearings and my car only had 4700mi on it at the time. There is no [email protected]$$ing this. You have to do it the right way. Tell him to do this as he would on any car.
Somtimes .. lol but thats a 50/50 shot cuz if you plan to use stock stuff and when you have the rear apart in the driveway and you have no more shims and you cant set the back lash when you want it .that deff sucks..
its supposed to be between 8-12 i think but im not 100% sure...
if they are frpp gears,90% of the time you can use the same size pinion shim and it comes out right. the carrier shims always needed adjustment. buy a install kit, you need the seal,crush sleeve. and at least the pinion bearings,they usually get damaged on removal.. you will need a dial indicator,1" mic,100 in lb torque wr.,150 ft lb torque wr.feeler guages,pinion holding tool(if you don't have the "feel"), a press or method to remove old bearings,need to measure orig pinion shim. persuin blue dye to check pattern. In another words not just your normal tool set