Isuzu N-Series. Manual - part 952

7B-44 Automatic Transmission (Smoother)

Special Tools

Illustration

Tool No.

Tool Name

5-8840-2043-0

Flange Holder

5-8840-2750-0

Oil Seal Installer

5884020430

5884027500

Automatic Transmission (Smoother) 7B-45

Rear Oil Seal (6-Speed)

Components

 

Removal

1. Remove the rear propeller shaft assembly.

• Refer to “Propeller shaft”. 

2. Remove the parking brake cable.

• Refer to “Parking Brake”. 

3. Remove the parking brake drum.

• Refer to “Parking Brake”. 

4. Remove the coupling driver and O-ring.

• Carefully release the caulking (two points) of

the lock unit, and remove the lock nut by fixing
it with the flange holder (5-8840-2043-0).

5. Remove the parking brake assembly.

Legend

1. Oil Seal

4. Coupling Driver

2. Parking Brake Cable

5. Parking Brake Drum

3. Parking Brake Assembly

6. Rear Propeller Shaft Assembly

N7A0299E

N7A1069E

7B-46 Automatic Transmission (Smoother)

• Refer to “Parking Brake”. 

6. Remove the rear oil seal.

Installation

1. Apply engine oil to the outer circumference of a

new seal, and then use the installer (5-8840-2750-
0) to press-fit the oil seal to the rear cover. 

• Apply Besco L2 grease to the lip of the oil seal. 

Caution:
Take care to avoid damaging the oil seal lip. 

2. Install the parking brake assembly.

• Refer to “Parking Brake”. 

3. Install the coupling driver.

a. Apply engine oil to the O-ring, and then install

the coupling driver and O-ring. 

b. Using a new lock nut, use the flange holder (5-

8840-2043-0) to tighten the lock nut. 

Tighten:
289 N

⋅m (29.5 kg⋅m / 213.2 lb⋅ft)

• After tightening the lock nut to the specified

torque, stake it (2 points) securely using a
chisel (chisel tip shape: approx. 1 mm in radius

× 60 degrees) so the lock nut lip gap is aligned
with the V-groove of the shaft and is at least 5
mm, and the clearance between the V-groove
bottom and the nut lip is 2.5 mm or less. 

Caution:
After caulking, check the caulking of the nut. If any
cracks are discovered, replace the lock nut and re-caulk. 

N7A1076E

N7A0294E

N7A1072E

Automatic Transmission (Smoother) 7B-47

4. Install the parking brake drum.

• Refer to “Parking Brake”. 

5. Install the parking brake cable.

• Refer to “Parking Brake”. 

6. Install the rear propeller shaft assembly.

• Refer to “Propeller shaft.” 

Tightening Torques

N7A1079E