A rear differential service drains the rear differential housing and replaces it with new oil to help the gears turn more smoothly. You usually see them between the two axles going to the left and right of the rear wheels. The differential is what allows the tires to slow down or speed up separately so that one does not drag.
Rear differential service is necessary to ensure that the lubricating fluid in the differential does not break down. Replacing the fluid can help prevent ware on the gears.
Repair Rear Differential Parts
All Ford Rangers have a rear differential , and if they are 4X4 equipped , a front differential also
The rear differential pertains to a motor vehicle and means the differential that is situated in the final drive of the transmission assembly, found in rear-wheel drive vehicles.
Whatever spec fluid is called for in the owner's or factory service manual. Synthetics are best.
The rear differential plug is located on the inside top part of the differential. Where the drive shaft connects.
Differential, with 10.25 ring gear Rear..........7.4 pints Differential, with 8.8 or 9 ring gear Rear..........5.5 pints Differential, Dana 70 HD Rear..........7.4 pints Differential, Dana 60, 61 Rear..........5.9 pints Differential, Dana 70 EX HD Rear..........6.5 pints Differential, Dana 80 Rear..........8.4 pints This link should help if you Identify which you have if you don't already know. http://www.drivetrain.com/rearend.html Hope This Helps.
If there is not a drain plug on the bottom of the differential then you will have to remove the cover. Be sure that you service it with the proper fluid and positraction additive if it is a positraction differential.
rear, most have rear differential
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The rear differential is a part of the power train, not a part of the suspension on a vehicle. It is the suspension system you need to be investigating on your vehicle. You more than likely have a broken spring.