[allaboutchevelles]

Yes you do need a pitman arm puller to get that thing off. You can do it with a crow bar and hammer plus muscle but the tool works best. The way I have checked rear end gears in the past is to mark the tire at 12 oclock and have someone turn it 1 full rotation while you count the number of times the pinion { or where the drive shaft connects to the rear end} turns. so if it turns 3 and 3/4 truns that means its a 373 gear set, or if it turns just over 3 times its probally a 308 gear set.