Replacing Axle Seals

[Bronco87-90]

Greetings,

I'm trying to replace the rear axle seals on my 90 Bronco. It's leaking differential fluid and ruining my brakes. When I opened the differential cover, I found this locker. Have no idea how to get it loose so the axles will pull out. Someone told me they think it is was a Detroit Locker, You can see the numbers etched on it. 176 C145A 70174 20-A-05.

I tied loosening the hex bolt opposite of the pin on both sides, but the center pin isn't loose enough to slide out. I'm pretty sure that has to happen to free up the axles.

Help....

 

[miesk5]

Yo pal,

Let's try to identify if it's a Detroit Locker®, see https://www.supermotors.net/clubs/superford/registry/media/495956

Differential, Traction-Lok® Limited Slip​

Removal and installation procedures for the limited slip differential axle shaft (4234), inner wheel bearing oil seal (1177), rear wheel bearing (1225), rear axle housing (4010) and pinion seal are the same as those for the Ford truck 8.8-inch ring gear integral carrier axle with a conventional differential. Refer to Section 05-02G. @

Section 05-02G: Axle, Integral Carrier, 8.8-Inch Ring Gear

Bronco Workshop Manual​

REMOVAL AND INSTALLATION

Seal and Bearing Replacement​

SPECIAL SERVICE TOOL(S) REQUIRED

Description​	Tool Number​
Impact Slide Hammer​	T50T-100-A​
Axle Wheel Bearing Puller​	T83T-1225-A​
Axle Wheel Bearing Replacer​	T83T-1225-B​
Hub Seal Replacer​	T83T-1175-B​

Removal

1. Raise vehicle and install safety stands. Remove rear wheel and tire. Refer to Section 04-04. Remove rear brake drum (1126). Refer to Section 06-02.

1. Remove rear axle housing cover (4033) and rear axle shafts (4234).
2. 

1. NOTE: If inner wheel bearing oil seal (1177) is leaking, check the rear axle housing vent (4022). If the rear axle housing vent is plugged with dirt or debris, it will cause pressure buildup in the rear axle housing (4010) which can lead to seal leaks.
   Using Impact Slide Hammer T50T-100-A and Axle Wheel Bearing Puller T83T-1225-A, insert into the bore as shown and position behind the rear wheel bearing (1225) so the tangs on the tool engage the bearing outer race. Remove the rear wheel bearing and inner wheel bearing oil seal as a unit, using the slide hammer tool. Inspect rear wheel bearing for wear. Replace as necessary.
   
2. 
   Installation

1. CAUTION: Installation of the rear wheel bearing or inner wheel bearing oil seal assembly without the proper tool may result in a bearing or seal failure. If inner wheel bearing oil seal becomes cocked in the bore during installation, remove inner wheel bearing oil seal and install a new inner wheel bearing oil seal.
   Lubricate the new rear wheel bearing with rear axle lubricant and install the rear wheel bearing into the housing bore using Axle Wheel Bearing Replacer T83T-1225-B.oat the lips of the inner wheel bearing oil seal with Premium Long-Life Grease XG-1-C or -K or equivalent meeting Ford specification ESA-M1C75-B and install the inner wheel bearing oil seal using Hub Seal Replacer
   
   b
   

1. Install axle shaft and rear axle housing cover. Check and fill rear axle with fluid.

1. Install rear brake drum. Refer to Section 06-02. Install rear wheel and tire. Refer to Section 04-04. Remove safety stands and lower vehicle.

1. Road test.

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[Bronco87-90]

Miesk5,

Thank you. I took a look at https://www.supermotors.net/clubs/superford/registry/media/495956. That doesn't appear to match.

The etchings on my differential appear to suggest a Detroit Locker Differential 31-Spline 8.8 TruTrack LSD 176c145a. But I can't find anything online that show this in any detail.

The process you provided is right on track with what we were planning to do. Just have to figure out how to get the axles free of the differential.

V/R
Paul

 

[miesk5]

Yo Paul,
You are most welcome!
Will try to dig up more info.