Why is my rear differential leaking fluid?

Rear Differential Leak – more commonly, the problems stem from low rear differential oil. Rear differential leaks are the culprit, either at the axle seals, the pinion seal (where the driveshaft attaches), or the rear differential cover. via

What fluid is leaking from my differential?

The differential fluid lubricates the ring and pinion gears which transfer power from the driveshaft to the wheel axle. If your vehicle experiences differential fluid leaks, the fluid lubricating these gears will run low and as a result, the gears can be seriously damaged. via

How do you fix a rear differential leak? (video)


Can you drive with a leaking rear axle seal?

If there is significant fluid loss, so much that it affects the transmission, the vehicle should not be driven. If the leak is small and you can't make it to an appointment for a few days, it is okay to drive your vehicle as long as you keep the transmission fluid full. via

What kind of fluid goes in rear differential?

Differential fluid, also called gear oil, is the fluid that is poured into the rear differential housing. It needs to lubricate the clutches, gears, and bearings in the rear end. It also keeps all of those components cool so that all of the parts in the differential don't overheat and belt. via

How long does it take to replace rear differential?

A complete rear differential replacement includes replacing the housing, gears, bearings, and seals. The average time it takes a certified mechanic to perform a differential rebuild at a shop is usually three to five hours. A rebuild on a commercial vehicle by someone without prior experience could take much longer. via

Is it hard to change differential fluid?

Changing the fluid in a differential is almost as easy as changing the oil in the engine. However, the process can differ between vehicles since some differentials only have two plugs — one for filling the fluid and another for draining it – while other vehicles require you to remove the housing cover. via

How much does a rear axle seal replacement cost?

Axle Shaft Seal Replacement Cost - RepairPal Estimate. The average cost for axle shaft seal replacement is between $233 and $284. Labor costs are estimated between $195 and $246 while parts are priced at $37. via

What does differential fluid smell like?

Differential oils tend to extrude unpleasant odor due to its sulfur compounds that are usually incorporated in high pressure lubricants. Because of this, differential oils smell like rotten eggs or even worse depending on the amount of additives being put on. via

How much fluid does a rear differential hold?

Fill to the Brim

The weight and capacity will be listed in your owner's manual; your differential will usually hold as much as 3 quarts. Be sure to read that manual, though, because some limited-slip differentials require a secondary friction-modifying additive. via

How much does it cost to have a rear differential rebuild?

Depending on the make and model of your car, as well as its condition, expect to spend between $1,500 to $4,000. The other factor is if you buy a new rear-diff or a used/rebuilt one. via

Does rear main sealer work?

Yes. Even though it is specially designed to seal rear main leaks, it also works better than a conventional stop leak on all other engine oil leaks. This includes the timing cover seal, cam seals, O-rings and other seals and gaskets. via

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