Question about 1986 Toyota 4Runner

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I need instruction & schematic to replace rear axle bearings & seals on a 1986 4runner sr5

Hi ; i recently had the rear brakes repaired, the mechanic said I need to replace the rear axle seals & bearings as the oil from the transfer case is leaking & thus degrading the brake pads..can you help with instruction a diagram & instructions to make this repair at home or should I just bring it back to the garage & pay him the $900 + dollars hes has quoted me

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  • joezjava24-7 Oct 22, 2008

    Hi;

    Thank you both for replying to my problem.. While waiting for your replies I had a local mechanic friend look at my 4Runner & his solution was exactly as Guest suggested, Now all I need is for the weekend to get here so I can have the time to implement it.. I'll let you know how it turns out.. thanks again

  • Toyota Ed May 11, 2010

    I can give you the instructions, but, the rear axle bearings are pressed onto the rear axle shafts. Do you have a large press avilable to you?

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1 Answer

Good news mate!You don't have to touch the bearings at all !!! Just replace the seals, highly unlikely the bearings are toast, had the very same problem and advice from local repairer but another (honest) mechanic suggested to change the seals only and it worked.Remove old seals using a large flat bladed screwdriver taking EXTREME CARE not to scratch the housing, tricky bit is to replace the seals as they have to go in SQUARE to the housing, use a large socket if available or a flat piece of steel to rest against the seal and hammer in SLOWLY AND CAREFUL, ALWAYS SQUARE ! to the housing, take your time and do it a bit at a time, the further in you go the easier it gets, make a note of the final position of the old seal before removal, do a sketch or take a photograph, also take care when reinserting the prop shaft back in the axle housing not to damage the new seal. Good luck !!!

Posted on Oct 21, 2008

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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
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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).
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    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.
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  1. swn~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Do not damage the rubber O-rings in the U-washer grooves.
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  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).
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Installation
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    • 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.
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  1. swn~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Do not damage the rubber O-rings in the U-washer grooves.
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  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.
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  1. Install the tire and wheel assembly.
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    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.
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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.
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1 Answer

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Axle Vent
NOTE: If the vent cannot be cleared, it must be installed new.
A plugged vent will cause excessive seal lip wear due to internal pressure buildup. If a leak occurs, check the vent. Make sure the vent hose is not kinked. Remove the hose from the vent nipple and clear the hose of any foreign material. While the hose is removed, pass a length of mechanics wire or a small diameter Allen wrench in and out of the vent to clean it. Connect the hose when done. The vent is located on the drivers side top of axle housing.
If you plan on doing most repairs yourself I would suggest buying a Haynes or Chilton manual for your particular vehicle. Or there are some data disks on e.bay($12-$15) For a cost of under $25, you can almost do any repair yourself with these manuals.Also there are online manuals like the site called ALLDATA where guides can be viewed for a fee. All these solutions will save you time and money, and give peace of mind over correct repairs. I can post you some procedures here also.
  1. CAUTION: Do not use heat to loosen a seized lug nut. Heat can damage the wheel (1007) and the rear wheel bearings (1225).
  2. Loosen the lug nuts (1012).
  3. Remove the center cap.
  4. With the weight of the vehicle on the wheels, loosen the lug nuts Raise and support the vehicle. .Remove the wheel and tire assembly.
  5. Remove the lug nuts.
  6. Remove the wheel and tire assembly. 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.
    2. a167554.gif
7.Remove the rear disc brake rotors You will have to remove the brake caliper to get rotor off.
8. 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.
9.
1.Remove the differential pinion shaft lock bolt. 2.Remove the differential pinion shaft. 4fd1df0.gif 10.CAUTION: Do not damage the rubber O-rings in the U-washer grooves. Remove the U-washers (4N237).
  1. Push the axle shafts inboard.
  2. Remove the U-washers.
  3. 9499075.gif
    11.Reinstall the differential pinion shaft.
    1. Install the differential pinion shaft.
    1. Install the differential pinion shaft lock bolt finger-tight.
    2. 91fc782.gif
      12.CAUTION: Do not damage the inner wheel bearing oil seal (1177). Remove the two axle shafts. 1848771.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. Use Impact Slide Hammer and Axle Wheel Bearing Puller to remove the rear wheel bearing and the axle shaft oil seal.

0ffed5b.gifAxle bearing puller end..
Installation
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. 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.
  2. Remove the differential pinion shaft.
  3. Remove the differential pinion shaft lock bolt.
  4. Remove the differential pinion shaft.
  5. 5a472e0.gif
    CAUTION: Do not damage the inner wheel bearing oil seal. Install the two axle shafts. 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.
    2. 345272a.gif
      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.
      2. 49e064a.gif
                                                            Install the rear disc brake rotors; Install the axle housing cover and fill the rear axle housing (4010) with 2.4 liters (5.5 pints) of specified lubricant
                                                            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. Install the tire and wheel assembly.
                                                            Position the tire and wheel assembly. Install the lug nuts and lower the vehicle. Tighten the lug nuts. Install the center cap. 6a78fd6.gif WHEW Hope this can help you

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                                                            2 Answers

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