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V70XC Rear Differential Fluid Replacement
 
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Pelican Technical Article:

V70XC Rear Differential Fluid Replacement

Nick Czerula

Time:

1 hour1 hr

Tab:

$60

Talent:

**

Tools:

14mm socket, drain pain, oil quart container pump, floor jack, jack stands, wheel chocks, safety glasses, torque wrench

Applicable Models:

Volvo V70 X/C (2001)
Volvo V70 X/C AWD (1998-00)
Volvo V70 X/C AWD SE (2000)

Parts Required:

Differential oil, differential drain plug

Hot Tip:

Drive car for short distance to warm oil

Performance Gain:

Extend differential life

Complementary Modification:

Replace drain plug

The rear driveshaft transfers the rotation of the transmission and transfer case output shaft to the input shaft of the rear differential. Inside the differential the axis of rotation is turned 90 degrees. Using specially designed planetary gears, the differential also splits the power in order to accommodate cornering: the two rear wheels must be allowed to rotate at different speeds in a turn. The output flanges of the differential connect to the drive axles, which power the rear wheels.

The oil in the differential lubricates the bearings and gears that drive the wheels of your V70XC. You want these items to last, and with routine maintenance, they will. I suggest replacing your differential fluid every four years regardless of mileage. It's a good idea to check the fluid every time you change your oil and top it up if necessary. The rear differential holds about 1 to 1.5 liters of oil. Have a little more on hand in case you spill it. When it comes to choosing the right fluid for your differential, Volvo recommends using gear oil (API-GL5) and a limited slip additive if your vehicle is equipped with limited slip. Give our parts specialists a call to help determine which gear oil is right for your vehicle.

Keep in mind that when your car was serviced before, parts may have been replaced with different size fasteners used in the replacement. The sizes of the nuts and bolts we give may be different from what you have, so be prepared with different size sockets and wrenches.

Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle. If you're working with the electrical system, disconnect the battery before beginning. Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Do not work on your vehicle if you feel the task is beyond your ability.

Vehicle models change and evolve, as they grow older, so the vehicle shown in our illustrations may vary slightly from yours. If something seems different, let us know and share your info to help other users. Do you have questions or want to add to the article? Leave a comment below. When leaving a comment, please leave your vehicle information.

Drive the vehicle for about two to three minutes to warm the differential oil.

Lift and support the front and the rear of the vehicle. See our tech article on vehicle jacking. You want the differential to be level when checking the oil level. You will also need to wear safety glasses while working under your car.

This photo shows the rear differential when viewed from the center of the vehicle.
Figure 1

This photo shows the rear differential when viewed from the center of the vehicle. The fill / drain plug (red arrow) is located at the left front of the diff.

To check your rear differential fluid level, using a 14mm socket, remove the oil fill plug (red arrow).
Figure 2

To check your rear differential fluid level, using a 14mm socket, remove the oil fill plug (red arrow). Fluid should be just at the bottom edge of the fill plug hole. Top fluid up if needed. It is also a good idea to replace the sealing washer (inset) when the plug is removed.

To replace the fluid, use a 14mm Allen bit and remove the oil fill plug.
Figure 3

To replace the fluid, use a 14mm Allen bit and remove the oil fill plug. Place a drain pan under the diff (red arrow). Then using a fluid pump (yellow arrow), pump the diff fluid out via the fill plug (green arrow).

Pump oil into the fill plug hole (red arrow) until it runs out.
Figure 4

Pump oil into the fill plug hole (red arrow) until it runs out. Allow the oil to stop dripping or come to a slow drip. Then reinstall the fill plug and tighten. Once done, take the vehicle for a short ride and check the rear differential for leaks.

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Page last updated: Fri 12/9/2016 02:56:51 AM