To break it in and also to test and be sure that it can withstand a load.
Preload is the amount the pinion bearings are squeezed together by the pinion nut.
If this helps the sailsbury axle of a cortina details are crownwheel and pinion backlash 0.004-0.008" pinion bearing preload 0.001-0.003" collapsible spacer length 0.453-0.461".
Only if the rear axle is a drive axle.
Inside the rear axle.Inside the rear axle.
On the rear axle?
Top of the rear axleTop of the rear axle
it has no rear axle
Vehicles with front wheel drive have a straight rear axle meaning there is no gear housing in the rear axle. Vehicles that are rear wheel drive have a gear box in the middle of the rear axle to change the rotation of a drive shaft to turn the rear axle. If you look under a full size pick up truck rear axle you will see a large gear box (typically referred to as a pumpkin) in the middle area of the axle. That is the gear box differential.
if tightened until there is no backlash the gears would be noisy and get very hot causing them to fail
The axle the big round rod that runs between the tires. On rear axle the rear differential is located
1984-1993 Jeep Cherokee XJ Rear Axle 1987-1993 Jeep Wrangler YJ Rear Axle 1986-1992 Jeep Comanche Rear Axle