don't know exactly what ur asking but the difference is the weight just like motor oil the heavy and thicker the harder for the parts to move but provides better protection on the gears so you need just the right weight usally ur car's manual will tell u what u need if not call ur local parts store there computers look almost any vechile, tractor or trailers these days.
Are you talking about the rear differential? Yes, you should. All fluids will have to be changed at certain intervals.
Rear end differentials have several different types and sizes of bearings. The cost to replace all of the bearings will be around $400.
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.
The rear differential plug is located on the inside top part of the differential. Where the drive shaft connects.
The differential covers are sealed with RTV silicone. There is no gasket.
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.
On the 1997 Ford F150, the differential could be in both the front and rear. From 1997 and on Ford used two different axles. Your truck could either have the 8.8 or 9.75 differential. If you have a rear differential you would need to lower your spare tire to have access to it.
How do you change the differential (rear) in 2005 Honda CRV
rear, most have rear differential
how much does it cost to repair the rear differential in a subaru outback
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.