Automatic Transmission: Reassembly

Special Tools Required

Driver Handle, 40 mm I.D. 07746-0030100
Driver Handle, 15 x 135L 07749-0010000
Oil Seal Driver Attachment, 65 mm 07JAD-SH3010A
Flange Holder 07XAB-001A101
Bearing Driver Attachment, 78 x 80 mm 07NAD-PX40100

NOTE:

While reassembling the transfer assembly:
- Check and adjust the transfer gear tooth contact.
- Measure and adjust the transfer gear backlash.
- Check and adjust the tapered roller bearing starting torque.
Coat all parts with transfer fluid (hypoid gear oil) during reassembly.
Replace the tapered roller bearing and the tapered roller bearing outer race as a set if either part is replaced.
Replace the transfer hypoid drive gear/shaft assembly and the transfer output shaft (hypoid gear) as a set if either part is replaced.
To prevent damaging the transfer housing, always use soft jaws or equivalent materials between the transfer housing and a vise.

Select the 40 mm thrust shim if the transfer output shaft (hypoid gear) is replaced. Calculate the thickness of the 40 mm thrust shim using the following formula, and select the shim from the following table.

FORMULA: A/100-B/100+C = X

A: Number on the existing transfer output shaft (hypoid gear)

B: Number on the replacement transfer output shaft (hypoid gear)

C: Thickness of the existing 40 mm thrust shim

X: Thickness needed for the replacement 40 mm thrust shim

NOTE: The number on the transfer output shaft (hypoid gear) is shown in 1/100 mm.

EXAMPLE

A: Existing transfer output shaft (hypoid gear) Number = +2

B: Replacement transfer output shaft (hypoid gear) Numbers -1

C: Existing 40 mm thrust shim thickness = 1.05 mm

X: Replacement 40 mm thrust shim thickness

X = A/100-B/100+C

= 2/100-(-1)/100+1.05

= 0.02+0.01 + 1.05 =1.08 (mm)

Select No. M 40 mm thrust shim of 1.08 mm (0.043 in)

Fig 1: Identifying Transfer Output Shafts

Courtesy of AMERICAN HONDA MOTOR CO., INC.

THRUST SHIM, 40 MM

Shim No.	Thickness
A	0.72 mm (0.028 in)
B	0.75 mm (0.030 in)
C	0.78 mm (0.031 in)
D	0.81 mm (0.032 in)
E	0.84 mm (0.033 in)
F	0.87 mm (0.034 in)
G	0.90 mm (0.035 in)
H	0.93 mm (0.037 in)
I	0.96 mm (0.038 in)
J	0.99 mm (0.039 in)
K	1.02 mm (0.040 in)
L	1.05 mm (0.041 in)
M	1.08 mm (0.043 in)
N	1.11 mm (0.044 in)
O	1.14 mm (0.045 in)

Select the 40 mm thrust shim if the tapered roller bearing on the transfer output shaft (hypoid gear) is replaced. Measure the thickness of the replacement bearing and the existing bearing, and calculate the difference of the bearing thickness. Adjust the thickness of the existing 40 mm thrust shim by the amount of difference in bearing thickness, and select the replacement 40 mm thrust shim.
Install the 40 mm thrust shim (A) on the transfer output shaft (hypoid gear) (B), then install the tapered roller bearing (C) using the driver handle (40 mm I.D.) and a press.

Fig 2: Installing Thrust Shim On Transfer Output Shaft (Hypoid Gear)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Place the tapered roller bearing (A) on the tapered roller bearing outer race of the companion flange side of the transfer housing, and install a new oil seal (B).

Fig 3: Identifying Tapered Roller Bearing And Oil Seal
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Drive the oil seal securely in the transfer housing using the driver handle (15 x 135L) and the oil seal driver attachment (65 mm).

Fig 4: Installing Oil Seal
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Install the transfer output shaft (hypoid gear) (A) in the transfer housing (B). Do not install the transfer spacer and the thrust washer on the transfer output shaft (hypoid gear).

Fig 5: Identifying Transfer Output Shaft And Transfer Housing
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Install the companion flange (A), the conical spring washer (B) (in the direction shown), and a new locknut (C) on the transfer output shaft (hypoid gear) (D). Do not install the O-ring and the back-up ring.

Fig 6: Identifying Companion Flange, Conical Spring Washer, Locknut And Transfer Output Shaft
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Secure the transfer housing (A) in a bench vise (B) with soft jaws.

Fig 7: Securing Transfer Housing
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Install the flange holder on the companion flange.
Tighten the locknut while measuring the starting torque of the transfer output shaft (hypoid gear) so the starting torque is within 1.15-1.71 N.m (11.7-17.4 kgf.cm, 10.2-15.1 lbf.in). Do not stake the locknut in this step.
Remove the flange holder.
Apply Prussian Blue to both sides of the transfer hypoid drive gear teeth lightly and evenly.
Install the tapered roller bearing (A), the 25 mm thrust shim (B), and the transfer drive gear/shaft assembly (C) in the transfer housing (D).

Fig 8: Tapered Roller Bearing, Thrust Shim, Transfer Drive Gear/Shaft Assembly And Transfer Housing With Torque Specifications
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Install the transfer cover (E), and secure it with the bolts. Do not install the O-ring on the transfer cover.
Rotate the companion flange in both directions until the transfer gears rotate one full turn in both directions.
Seat dial indicator (A) on the transfer companion flange (B); position the dial indicator tip (C) on the direct extension of the bolt hole center (D).

Fig 9: Identifying Dial Indicator On Transfer Companion Flange
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Measure the transfer gear backlash.
Standard: 0.06-0.16 mm (0.0024-0.0063 in)
Remove the transfer cover, the transfer hypoid drive gear/shaft assembly, and check the transfer hypoid drive gear tooth contact pattern.

Fig 10: Identifying Correct Tooth Contact Pattern
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 11: Identifying Incorrect Tooth Contact Pattern
Courtesy of AMERICAN HONDA MOTOR CO., INC.
If the backlash measurement is out of the standard, adjust the backlash with the 40 mm thrust shim, and recheck. Do not use more than two 40 mm thrust shims to adjust the backlash.

If the transfer gear tooth contact is incorrect, adjust the tooth contact with the 25 mm, 40 mm, or 80 mm thrust shim. Do not use more than two shims of each thrust shim to adjust the tooth contact.

Toe Contact
Use a thinner 40 mm thrust shim in step 1 to move the transfer output shaft (hypoid gear) away from the transfer hypoid drive gear. Because this movement causes the transfer gear backlash to change, move the transfer hypoid drive gear toward the transfer output shaft (hypoid gear) to adjust the transfer gear backlash as follows:
- Reduce the thickness of the 25 mm thrust shim.
- Increase the thickness of the 80 mm thrust shim (see step 39) by the amount the 25 mm thrust shim was reduced.
Heel Contact
Use a thicker 40 mm thrust shim in step 1 to move the transfer output shaft (hypoid gear) toward the transfer hypoid drive gear. Because this movement causes the transfer gear backlash to change, move the transfer hypoid drive gear away from the transfer output shaft (hypoid gear) to adjust the transfer gear backlash as follows:
- Increase the thickness of the 25 mm thrust shim.
- Reduce the thickness of the 80 mm thrust shim (see step 39) by the amount the 25 mm thrust shim was reduced.
Flank Contact
Use a thicker 25 mm thrust shim to move the transfer hypoid drive gear away from the transfer output shaft (hypoid gear). Flank contact must be adjusted within the limits of the transfer gear backlash. If the backlash exceeds the limits, adjust as described under Heel Contact.
Face Contact
Use a thinner 25 mm thrust shim to move the transfer hypoid drive gear toward the transfer output shaft (hypoid gear). Face contact must be adjusted within the limits of the transfer gear backlash. If the backlash exceeds the limits, adjust as described under Toe Contact.

THRUST SHIM, 25 MM

Shim No.	Thickness
1.70	1.70 mm (0.067 in)
1.73	1.73 mm (0.068 in)
1.76	1.76 mm (0.069 in)
1.79	1.79 mm (0.070 in)
1.82	1.82 mm (0.072 in)
1.85	1.85 mm (0.073 in)
1.88	1.88 mm (0.074 in)
1.91	1.91 mm (0.075 in)
1.94	1.94 mm (0.076 in)
1.97	1.97 mm (0.078 in)
2.00	2.00 mm (0.079 in)
2.03	2.03 mm (0.080 in)
2.06	2.06 mm (0.081 in)
2.09	2.09 mm (0.082 in)
2.12	2.12 mm (0.083 in)
2.15	2.15 mm (0.085 in)
2.18	2.18 mm (0.086 in)
2.21	2.21 mm (0.087 in)
2.24	2.24 mm (0.088 in)

Remove the transfer cover (A), the transfer hypoid drive gear/shaft assembly (B), the 25 mm thrust shim (C), and tapered roller bearing (D) from the transfer housing (E) after adjusting the transfer gear backlash or transfer gear tooth contact.

Fig 12: Identifying Transfer Cover, Transfer Hypoid Drive Gear/Shaft Assembly, Thrust Shim And Tapered Roller Bearing
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Secure the transfer housing (A) in the bench vise (B) with soft jaws.

Fig 13: Securing Transfer Housing In Bench Vise
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Install the flange holder on the companion flange, then loose the locknut.
Remove the flange holder.
Remove the locknut (A), the conical spring washer (B), and the companion flange (C) from the transfer output shaft (hypoid gear) (D).

Fig 14: Identifying Locknut, Conical Spring Washer, Companion Flange And Transfer Output Shaft (Hypoid Gear)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Remove the transfer output shaft (hypoid gear) from the transfer housing.
Install the thrust washer (A) and a new transfer spacer (B) on the transfer output shaft (hypoid gear) (C) in the direction shown, and install them in the transfer housing (D).

Fig 15: Identifying Thrust Washer, Transfer Spacer, Transfer Output Shaft (Hypoid Gear) And Transfer Housing
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Coat the threads of the locknut and transfer output shaft (hypoid gear) with transfer fluid (hypoid gear oil).
Install the companion flange (A), a new O-ring (B), back-up ring (C), a new conical spring washer (D), and a new locknut (E) on the transfer output shaft (hypoid gear) (F). Install the conical spring washer in the direction shown.

Fig 16: Identifying Companion Flange, O-Ring, Back-Up Ring, Conical Spring Washer And Locknut
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Secure the transfer housing (A) in the bench vise (B) with soft jaws.

Fig 17: Securing Transfer Housing
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Install the flange holder on the companion flange.
Tighten the locknut while measuring the starting torque of the transfer output shaft (hypoid gear) so the starting torque is within 1.15-1.71 N.m (11.7-17.4 kgf.cm, 10.2-15.1 lbf.in).
Tightening Torque:

108-294 N.m (11.0-30.0 kgf.m, 79.7-217 lbf.ft)

Starting Torque:

1.15-1.71 N.m (11.7-17.4 kgf.cm, 10.2-15.1 lbf.in)
NOTE:
- Rotate the companion flange several times to seat the tapered roller bearings, then measure the starting torque.
- If the starting torque exceeds 1.71 N.m (17.4 kgf.cm, 15.1 lbf.in), replace the transfer spacer and reassemble the parts. Do not adjust the torque with the locknut loose.
- If the tightening torque exceeds 294 N.m (30.0 kgf.m, 217 lbf.ft), replace the transfer spacer and reassemble the parts.
Remove the flange holder.
Stake the locknut into the transfer output shaft (hypoid gear) to a depth of (A) of at least 0.7 mm (0.03 in) using a 3.5 mm punch (B).
NOTE: Be careful not to make a crack on the locknut when staking.

Fig 18: Staking Locknut Into Transfer Output Shaft
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Install the tapered roller bearing (A), the 25 mm thrust shim (B), and the transfer hypoid drive gear/shaft assembly (C) in the transfer housing (D).

Fig 19: Tapered Roller Bearing, Thrust Shim And Transfer Hypoid Drive Gear/Shaft Assembly With Torque Specifications
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Temporarily install the transfer cover (E) without the O-ring, and secure the cover with the bolts.
Secure the transfer housing (A) in the bench vise (B) with soft jaws.

Fig 20: Securing Transfer Housing
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Rotate the companion flange (C) several times to seat the tapered roller bearings.
Measure the total starting torque at the companion flange using a torque wrench (D) and a socket (E).
Calculate the transfer hypoid drive gear/shaft starting torque using the following formula.
Transfer Hypoid Drive Gear/Shaft Starting Torque

Formula:

A - B = X

A: Actual total starting torque (measured in step 39)

B: Actual transfer output shaft (hypoid gear) starting torque (measured in step 32)

X: Transfer hypoid drive gear/shaft starting torque
Check that the calculated transfer hypoid drive gear/shaft starting torque is within the following reference value range.
Reference Value Range of Transfer Hypoid Drive

Gear/Shaft Starting Torque:

1.49-2.52 N.m (15.2-25.6 kgf.cm, 13.2-22.3 lbf.in)
- If the calculated transfer hypoid drive gear/shaft starting torque is within the reference value range, remove the transfer cover from the transfer housing, then go to step 47.
- If the calculated transfer hypoid drive gear/shaft starting torque is out of the reference value range, go to step 42.
Remove the tapered roller bearing outer race (A) and the 80 mm thrust shim (B) from the transfer cover (C). If the tapered roller bearing outer race is press-fitted, remove the tapered roller bearing outer race by heating the transfer cover to about 212°F (100°C) using a heat gun (D). Do not heat the transfer cover more than 212°F (100°C).
NOTE: Let the transfer cover cool to room temperature before adjusting the bearing preload.

Fig 21: Removing Tapered Roller Bearing Outer Race
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Measure the thickness of the 80 mm thrust shim, and select a new 80 mm thrust shim.

THRUST SHIM, 80 MM

Shim No.	Thickness
A	1.52 mm (0.060 in)
B	1.55 mm (0.061 in)
C	1.58 mm (0.062 in)
D	1.61 mm (0.063 in)
E	1.64 mm (0.065 in)
F	1.67 mm (0.066 in)
G	1.70 mm (0.067 in)
H	1.73 mm (0.068 in)
I	1.76 mm (0.069 in)
J	1.79 mm (0.070 in)
K	1.82 mm (0.072 in)
L	1.85 mm (0.073 in)
M	1.88 mm (0.074 in)
N	1.91 mm (0.075 in)
O	1.94 mm (0.076 in)
P	1.97 mm (0.078 in)
Q	2.00 mm (0.079 in)
R	2.03 mm (0.080 in)
S	2.06 mm (0.081 in)
T	2.09 mm (0.082 in)
U	2.12 mm (0.083 in)
V	2.15 mm (0.085 in)
W	2.18 mm (0.086 in)
X	2.21 mm (0.087 in)
Y	2.24 mm (0.088 in)
Z	2.27 mm (0.089 in)
AA	2.30 mm (0.091 in)
AB	2.33 mm (0.092 in)
AC	2.36 mm (0.093 in)
AD	2.39 mm (0.094 in)
AE	2.42 mm (0.095 in)
AF	2.45 mm (0.096 in)
AG	2.48 mm (0.098 in)
AH	2.51 mm (0.099 in)
AI	2.54 mm (0.100 in)
AJ	2.57 mm (0.101 in)
AK	2.60 mm (0.102 in)
AL	2.63 mm (0.104 in)
AM	2.66 mm (0.105 in)

Install the 80 mm thrust shim (A) and tapered roller bearing outer race (B) in the transfer cover (C).

Fig 22: Identifying 80 mm Thrust Shim, Tapered Roller Bearing Outer Race And Transfer Cover
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Drive the tapered roller bearing outer race securely in the transfer cover using the driver handle (15 x 135L) and the bearing driver attachment (78 x 80 mm), so there is no clearance between the tapered roller bearing outer race, the 80 mm thrust shim, and the transfer cover.

Fig 23: Installing Tapered Roller Bearing Outer Race
Courtesy of AMERICAN HONDA MOTOR CO., INC.
After replacing the 80 mm thrust shim, recheck and make sure that the staring torque is within the specification.
Install a new O-ring (A) on the transfer cover (B), then install the transfer cover on the transfer housing (C).

Fig 24: O-Ring, Transfer Cover And Transfer Housing With Torque Specifications
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Remove the filler plug (A), then refill the transfer assembly with transfer fluid (hypoid gear oil). Use a SAE 90 viscosity hypoid gear oil, API classified GL4 or GL5 only.
Viscosity: SAE 90

Transfer Fluid (Hypoid Gear Oil) Capacity: 0.45 L (0.48 US qt)

Fig 25: Filler Plug And Washer With Torque Specifications
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Install the filler plug with a new sealing washer (B).