rear diff question

[nboeger4]

so i discovered tonight that my rear main seal has some oil around it so i think i need to replace the seal. is this something that's easy to do or does it need to go to the stealership? i had a buddy tell me that on some of them the pinion can fall into the diff. any help would be appreciated.

also i replaced my e brake shoes tonight and pulled out the inner axle shaft and was wondering if the nut inside the shaft is suppose to be all of the way tight or just real snug...? i don't want that coming loose. lol

[wingnut]

hold up...rear main seal is on the back of your crankshaft, in between the tranny and engine block.

rear diff is your rear axle...which one are you talking about here?!?

since the title is rear diff, im gonna guess you mean rear axle cover.

get the '08 cover and seal it with some goop...problem solved

[03_Turbo7.3]

that or he means pinion seal that goes around the Yoke..

[nboeger4]

yes i do mean the pinion seal that goes around the yoke. right behind the rear of the driveshaft.

also if someone can tell me about the nut inside the hub.

[03_Turbo7.3]

nut inside the hub? or the actual pinion nut?

[wingnut]

ooo...nice guess 03turbo

[nboeger4]

the nut inside the hub on rear axle

[Zytek_Fan]

You need the special removal tool, but why? Are you servicing your brakes/bearings/axle seals?

[Justin.Hutch]

Originally Posted by Zytek_Fan

You need the special removal tool, but why? Are you servicing your brakes/bearings/axle seals?

Didn't he say that it leaks? Common problem by the way...

[Zytek_Fan]

I found this doing a google search

Originally Posted by Ford workshop manual

SECTION 205-02D: Rear Drive Axle/Differential — Ford 10.50-Inch Ring Gear

IN-VEHICLE REPAIR
----------------------------------------------------------------------
Pinion Seal

Special Tool(s)
Pinion Seal Replacer 205-208 (T83T-4676-A)

Removal

Remove the pinion flange. For additional information, refer to Drive Pinion Flange in this section.(see below)

Force up on the metal flange of the rear axle drive pinion seal (4676). Install gripping pliers to the seal flange and strike with a hammer until the rear axle drive pinion seal is removed.

Installation

Lubricate the new pinion seal.
Use Premium Long-Life Grease XG-1-C or equivalent meeting Ford specification ESA-M1C75-B.

CAUTION: If the rear axle drive pinion seal becomes misaligned during installation, remove the rear axle drive pinion seal and replace it with a new seal.

Use the Pinion Seal Replacer to install the rear axle drive pinion seal.
Install the pinion flange. For additional information, refer to Drive Pinion Flange in this section.

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SECTION 205-02D: Rear Drive Axle/Differential — Ford 10.50-Inch Ring Gear
IN-VEHICLE REPAIR
-------------------------------------------------------------------

Drive Pinion Flange

Special Tool(s)
2-Jaw Puller 205-D026 (D80L-1002-L) or Equivalent
Companion Flange Replacer 205-233 (T85T-4851-AH)
Flange Holder 205-012 (T57T-4851-B)

Removal

NOTE: The rear wheels and brake calipers must be removed to prevent brake drag during drive pinion bearing preload adjustment.
Remove the rear brake calipers. For additional information, refer to Section 206-04 .

Remove the driveshaft (4602). For additional information, refer to Section 205-01 .

Install a Nm (inch-pound) torque wrench on the pinion nut, and record the rotational torque required to maintain rotation of the pinion through several revolutions.

CAUTION: After removal of the pinion nut, discard it. A new nut must be used for installation.

Use the Flange Holder to hold the pinion flange while removing the pinion nut.

Mark the pinion flange in relation to the drive pinion stem to ensure proper alignment during installation.

Use the 2-Jaw Puller to remove the pinion flange.

Installation

Lubricate the pinion flange splines.

Use SAE 75W-140 High Performance Rear Axle Lubricant F1TZ-19580-B or equivalent meeting Ford specification WSL-M2C192-A.

NOTE: Disregard the scribe marks if a new pinion flange is being installed.

Align the pinion flange with the drive pinion shaft.
With the pinion flange in place in the rear axle housing (4010), install the pinion flange using the Companion Flange Replacer.
Position the new pinion nut.

CAUTION: Under no circumstances is the pinion nut to be backed off to reduce preload. If reduced preload is required, a new collapsible spacer and pinion nut must be installed.

Use the Flange Holder to hold the pinion flange while tightening the pinion nut.

Tighten the pinion nut, rotating the pinion occasionally to make sure the cone and roller bearings are seating properly. Take frequent cone and roller bearing torque preload readings until the original recorded preload reading is obtained by rotating the pinion with a Nm (inch-pound) torque wrench.

If the original recorded preload is lower than specifications, tighten to the appropriate specification for used bearings. If the preload is higher than specification, tighten the nut to the original reading as recorded. Refer to Torque Specifications in this section.

Install the driveshaft. For additional information, refer to Section 205-01 .

Install the brake calipers. For additional information, refer to Section 206-04 .