Question about 1995 Mercury Grand Marquis

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Need to replace the seal at the differential

Loosing oil

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stephen christopher

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Its pretty much straight forward this will take a little bit of time.

Posted on Feb 19, 2013

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There are several seals for the differential. The pinion seal is towards the driveshaft. The rear cover is on the back of the differential.

The rear cover seal is a gasket and can be replaced by removing the rear cover and scraping off the old gasket. Some mechanics make their own gasket out of a liberal application of atv gasket compound. Other mechanics use a stamped gasket and may apply a small amount of cement to one side of the gasket to hold it to the cover.

The cover is bolted on by Torx head fittings.

The pinion seal is another matter. The driveshaft needs to come off. The flange needs to come away from the differential and the seal rides the shaft going into the differential. Some housings require a removal tool.

With either seal, you need to determine the type of differential you have. Limited -slip requires an additive to work in the standard lube. Some require only synthetic gear lube as well as the additive.

A cover gasket is not very hard to replace. The pinion seal can be more difficult. Price the repair.

Do not reuse the differential fluid.

Posted on Feb 19, 2013

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SECTION 205-02: Rear Drive Axle/Differential - Ford 8.8-Inch Ring Gear 1998 Explorer/Mountaineer Workshop Manual
IN-VEHICLE REPAIR Rear Wheel Bearing and Axle Shaft Oil Seal -4.0L SOHC and 4.0L EI, Conventional
Special Tool(s) swn~us~en~file=st1514a.gif~gen~ref.gif Axle Seal Replacer
T83T-1175-A swn~us~en~file=st1283a.gif~gen~ref.gif Axle Wheel Bearing Puller
T83T-1225-A swn~us~en~file=st1322a.gif~gen~ref.gif Axle Wheel Bearing Replacer
T83T-1225-B swn~us~en~file=st1326a.gif~gen~ref.gif Driver Handle
T80T-4000-W swn~us~en~file=st1185a.gif~gen~ref.gif Impact Slide Hammer
T50T-100-A
Removal
  1. Remove the axle shaft; refer to Axle Shaft in this section.
Axle Shaft Removal
  1. swn~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Do not use heat to loosen a seized lug nut. Heat can damage the wheel (1007) and the rear wheel bearings (1225).
    Loosen the lug nuts (1012).
    1. Remove the center cap.
    1. With the weight of the vehicle on the wheels, loosen the lug nuts.
  1. Raise and support the vehicle.
  1. Remove the wheel and tire assembly.
    1. Remove the lug nuts.
    1. Remove the wheel and tire assembly.
  1. Remove the axle housing cover (4033).
    1. Loosen the axle housing cover bolts (4346) and drain the rear axle (4001).
    1. Remove the axle housing cover bolts.
    1. Remove the axle housing cover.
  1. Remove the rear disc brake rotors (2C026); refer to Section 206-04 .
  1. swn~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Once the differential pinion shaft (4211) has been removed, turning the differential case (4204) or an axle shaft (4234) will cause the differential pinion gears (4215) to fall out of the assembly. This could result in chipped or damaged components.
    Remove the differential pinion shaft.
    1. Remove the differential pinion shaft lock bolt.
    1. Remove the differential pinion shaft.
  1. swn~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Do not damage the rubber O-rings in the U-washer grooves.
    Remove the U-washers (4N237).
    1. Push the axle shafts inboard.
    1. Remove the U-washers.
  1. Reinstall the differential pinion shaft.
    1. Install the differential pinion shaft.
    1. Install the differential pinion shaft lock bolt finger-tight.
  1. swn~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Do not damage the inner wheel bearing oil seal (1177).
    Remove the two axle shafts.
Installation
  1. Lubricate the lip of the inner wheel bearing oil seal.
    • Use Premium Long-Life Grease XG-1-C or equivalent meeting Ford specification ESA-M1C75-B.
  1. swn~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Once the differential pinion shaft has been removed, turning the differential case or an axle shaft will cause the differential pinion gears to fall out of the assembly. This could result in chipped or damaged components.
    Remove the differential pinion shaft.
    1. Remove the differential pinion shaft lock bolt.
    1. Remove the differential pinion shaft.
  1. swn~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Do not damage the inner wheel bearing oil seal.
    Install the two axle shafts.
  1. swn~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Do not damage the rubber O-rings in the U-washer grooves.
    Install the U-washers.
    1. Position the two U-washers on the button end of the axle shafts.
    1. Pull the axle shafts outward.
  1. Install the differential pinion shaft.
    1. Align the hole in the differential pinion shaft with the differential pinion shaft lock bolt hole.
    1. Install the differential pinion shaft lock bolt.
  1. Install the rear disc brake rotors; refer to Section 206-04 .
  1. Install the axle housing cover and fill the rear axle housing (4010) with 2.4 liters (5.5 pints) of specified lubricant; refer to Axle Housing Cover in this section.
  1. swn~us~en~file=ani_caut.gif~gen~ref.gif WARNING: Always remove any corrosion, dirt or foreign material that may be present on the mounting surfaces of the wheel or the surface of the wheel hub or rear disc brake rotor that contacts the wheel. Installing wheels without proper metal-to-metal contact at the wheel mounting surfaces can cause the lug nut to loosen and the wheel to come off while the vehicle is in motion, causing loss of control.
    Clean the wheel hub and mounting surfaces.
  1. Install the tire and wheel assembly.
    1. Position the tire and wheel assembly.
    1. Install the lug nuts and lower the vehicle.
    1. Tighten the lug nuts.
    1. Install the center cap.


  1. swn~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Never remove the axle shaft oil seal by itself. Always remove the rear wheel bearing and the axle shaft oil seal at the same time.
    NOTE: If the axle shaft oil seal is leaking, the axle housing vent may be plugged with debris.
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Installation
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  1. Use Axle Wheel Bearing Replacer with Driver Handle to install the rear wheel bearing.
  1. Lubricate the lip of the new axle shaft oil seal.
    • Use Premium Long-Life Grease XG-1-C or equivalent meeting Ford specification ESA-M1C75-B.
  1. Use Axle Seal Replacer with Driver Handle to install the axle shaft oil seal.
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How to Fill a Rear Differential
You may need to add fluid to your differential due to leaks or changing seals, or it may be time to change out the gear oil completely. Either way, it's just a few steps to fill the rear differential and get your vehicle back out on the road!This article will explain how to fill a rear differential. jQuery('.intro .thumbnail').each(function(i,e){ jQuery(e).find('img').one('error',function(){ jQuery(e).remove(); }); }); Difficulty: Moderate
Instructions and Things You'll Need:
  • 3/8 inch drive ratchet with extension
  • 2 quarts gear oil (gear lube, differential fluid)
  • Side cutters
  • Oil drain pan
  • Shop rags
  • Flashlight or shop light (optional)
  • Lock tight (optional)

Filling a Rear Differential
  1. Be sure the car is raised on four jack stands and is level. It will be more difficult to fill the differential if you've only got it raised in the rear.
  2. Place an oil drain pan underneath the plug to catch any leaks or drips. Keep shop rags handy for any spills.
  3. Check your service manual for the amount of fluid your differential needs, if you're completely refilling the system. Two quarts should be enough in most cases.
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Axle Shaft Removal
  1. Raise and support the vehicle. For additional information, refer to Section 100-02 .
  1. Remove the wheel and tire assembly. For additional information, refer to Section 204-04 .
  1. Remove the differential housing cover (4033).
    1. Loosen the bolts and drain the lubricant from the rear axle housing (4010).
    1. Remove the bolts.
    1. Remove the differential housing cover.
Remove the rear brake disc (2C026). For additional information, refer to Section 206-04 .
  1. sxn~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Turning the differential case (4204) or an axle shaft (4234) with the differential pinion shaft (4211) removed will cause the differential pinion gears (4215) to fall out of the assembly and damage the components.
    Remove the differential pinion shaft.
    1. Remove the differential pinion shaft lock bolt.
    1. Remove the differential pinion shaft.
  2. sxn~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Do not damage the rubber O-ring in the U-washer groove.
  3. Remove the U-washer (4N237).
  4. Push the axle shaft inboard.
  5. Remove the U-washer.
Reinstall the differential pinion shaft.
  1. Install the differential pinion shaft.
  2. Install the differential pinion shaft lock bolt finger-tight.
  3. sxn~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Do not damage the wheel bearing oil seal (1177).
    Remove the axle shaft.
-----------------------------------------------------------------------------------------------------------------
Seal Removal
  1. Remove the axle shaft (4334). For additional information, refer to Axle Shaft in this section.
  1. sxn~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Never remove the wheel bearing oil seal (1177) by itself. Always remove the rear wheel bearing (1225) and the inner wheel bearing oil seal at the same time.
    NOTE: If the wheel bearing oil seal is leaking, the axle housing vent may be plugged with foreign material.
    Using the special tools, remove the rear wheel bearing and wheel bearing oil seal together.
6c7eb46.gif Installation
  1. Lubricate the new rear wheel bearing.
    • For 4.0L SOHC and 4.0L EI with limited slip rear axles and 5.0L vehicles, use SAE 75W-140 High Performance Rear Axle Lubricant F1TZ-19580-B or equivalent meeting Ford specification WSL-M2C192-A.
    • For 4.0L SOHC and 4.0L EI with conventional rear axles, use SAE 80W-90 Premium Rear Axle Lubricant XY-80W90-QL or equivalent meeting Ford specification WSP-M2C197-A.
  1. Using the special tools, install the rear wheel bearing.

ece7d89.gif
  1. Lubricate the lip of the new wheel bearing oil seal.
    • Use Premium Long-Life Grease XG-1-C or equivalent meeting Ford specification ESA-M1C75-B.
  1. Using the special tools, install the wheel bearing oil seal.
c21e27d.gif
  1. Install the axle shaft. For additional information, refer to Axle Shaft in this section.

Feb 22, 2009 | 1999 Isuzu Rodeo

1 Answer

4wd TD oil leak


ya...
1 more way is ther but takes time ,quit more.

try to weld front differential where oil is gonna leak & but do this when your all oil is out of differential case than it will happen baater so,

another way is 1 solution which is highly recommanded for this type of crack in differentials,which still i cant get that name but at branded service center they will do for your differentials case.

THNX

May 17, 2008 | 2001 Isuzu Rodeo

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