How to service the LH differential seals on Mercury Mariner?

Any repair to the LH differential seals would require hoisting the vehicle, removing the LH splash shield and drain the transmission fluid. Take off the LH halfshaft and seal then put in a new seal. Once more install halfshaft, remove and clean drain plug, fill up with fluid and confirm the level before starting an engine.

OEM Mercury Differential Seal

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2 Differential Seals found

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Mercury Oil Seal, Rear Part Number: BR3Z-4676-A
$18.80 MSRP: $26.67
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Product Specifications
- Other Name: Seal Assembly - Oil; Differential Pinion Seal, Rear; Differential Seal; Axle Seal; Pinion Seal; Pinion Gear Seal; Differential Pinion Seal
- Position: Rear
- Replaces: E8TZ-4676-C, F89Z-4676-AA
Fits the following Mercury Models:
- Capri | 1984-1986 | 5.0, GS, RS, RS Turbo | 4 Cyl 2.3 L GAS, 6 Cyl 3.8 L GAS, 8 Cyl 5.0 L GAS
- Colony Park | 1987-1991 | GS, LS | 8 Cyl 5.0 L GAS
- Cougar | 1992-1997, 1984-1990 | Base, LS, XR-7 | 4 Cyl 2.3 L GAS, 6 Cyl 3.8 L GAS, 8 Cyl 4.6 L GAS, 8 Cyl 5.0 L GAS
- Grand Marquis | 1984-2011 | Base, Colony Park, GS, GSL, Limited Edition, LS, LSE, Ultimate Edition | 8 Cyl 4.6 L FLEX, 8 Cyl 4.6 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.8 L GAS
- Marauder | 2003-2004 | Base | 8 Cyl 4.6 L GAS
- Marquis | 1984-1986 | Base, Brougham | 4 Cyl 2.3 L GAS, 4 Cyl 2.3 L LPG, 6 Cyl 3.8 L GAS
- Mountaineer | 1997-2010 | Base, Convenience, Luxury, Premier | 6 Cyl 4.0 L FLEX, 6 Cyl 4.0 L GAS, 8 Cyl 4.6 L GAS, 8 Cyl 5.0 L GAS
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Mercury Oil Seal, Rear Part Number: 8G1Z-4N046-A
$22.04 MSRP: $32.08
You Save: $10.04 (32%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Seal Assembly - Oil; Differential Pinion Seal, Rear; Differential Seal; Axle Seal; Pinion Seal; Rear Seal; Front Seal; Coupling Rear Seal; Seal; Differential Pinion Seal
- Position: Rear
- Replaces: 3L8Z-4N046-AA
Fits the following Mercury Models:
- Mariner | 2008-2011 | Base, Hybrid, Premier | 4 Cyl 2.3 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.5 L GAS, 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS
- Milan | 2007-2011 | Base, Premier | 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L GAS, 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS
- Sable | 2008-2009 | Base, Premier | 6 Cyl 3.5 L GAS
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Mercury Differential Seal Parts and Q&A

Oil Seal, Rear
8G1Z-4N046-A
Q: How to service the LH differential seals on Mercury Mariner?
A: Any repair to the LH differential seals would require hoisting the vehicle, removing the LH splash shield and drain the transmission fluid. Take off the LH halfshaft and seal then put in a new seal. Once more install halfshaft, remove and clean drain plug, fill up with fluid and confirm the level before starting an engine.