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Mainshaft Disassembly, Inspection, and Reassembly

1. Remove the thrust needle bearing (A), mainshaft 5th gear (B), needle bearing (C), thrust needle bearing (D), mainshaft 5th gear collar (E), 4th/5th clutch (F), and O-rings (G) from the mainshaft (H).
2. Inspect the condition of the sealing rings (I). If the sealing rings are worn, distorted, or damaged, remove the set ring (J) and needles bearing (K), and replace the sealing rings with new ones.
3. Inspect the thrust needle bearing and needle bearing for wear and rough movement.
4. Inspect the splines for excessive wear and damage.
5. Inspect the 4th gear for wear and damage, and inspect 4th gear bearing for wear and rough rotation.
6. Replace the mainshaft 4th gear (L) if the 4th gear is worn or damaged, or the bearing is worn or damaged.
7. Check shaft bearing surfaces for scoring and excessive wear.
8. Lubricate all parts with ATF during reassembly.
9. Wrap the shaft splines with tape to prevent O-ring damage, install the new O-rings on the mainshaft, then remove the tape.
10. Install the 4th/5th clutch.
11. Install the mainshaft 5th gear coiler, thrust needle bearing, needle bearing, mainshaft 5th gear, and thrust needle bearing.

Mainshaft 4th Gear Replacement

Special Tools Required
- Driver, 40 mm I.D. 07746-0030100

1. Remove the mainshaft 4th gear (A) with a press. Place a shaft protector (B) between the press and mainshaft (C) to prevent damaging the mainshaft.

2. Slide the new mainshaft 4th gear (A) over the mainshaft (B), then press it into place with the special tool and a press.

Countershaft Disassembly

NOTE: Refer to the Exploded View as needed the following procedure.

1. Cut the lock tab (A) of the countershaft locknut (B) using a chisel (C).

NOTE: Keep all of the chiseled particles out of the countershaft.

2. Hold the countershaft with a wrench and a vise securely, loosen the locknut, and remove it. The locknut has left-hand threads.

3. Place countershaft 5th gear (A) on press bases (B), and place a shaft protector (C) between the countershaft (D) and a press to prevent damaging the countershaft.
4. Press the countershaft out of press-fitted bearing (E) and press-fitted reverse selector hub, and remove the countershaft while holding the underside of the countershaft. The countershaft falls down when pressing the countershaft out of the press-fitted reverse selector hub. Some reverse selector hubs are not press-fitted, and the countershaft falls down when pressing the countershaft out of press-fitted bearing.
5. Remove the remaining parts from the countershaft.
6. Inspect the bearing for galling and rough movement.
7. Check the shaft bearing surfaces for scoring and excessive wear, and check shaft splines for excessive wear and damage.
8. Check the idler gear axial clearance and 4th gear axial clearance.

Countershaft Idler Gear and 4th Gear Axial Clearance Inspection

1. Install the 2nd gear (A), thrust needle bearing (B), needle bearing (C), idler gear (D), thrust needle bearing (E), 56 mm washer (F), 1st gear (G), 4th gear (H), 52 mm washer (I), 39 mm cotters (J), cotter retainer (K), and snap ring (L) on the countershaft (M).

2. Insert a feeler gauge blade (A) as thick as possible between the 4th gear (B) and Dotters (C).

3. Set the dial indicator (A) on the idler gear (B).

4. Measure the idler gear axial clearance in at least three places while moving the idler gear. Use the average as the actual clearance.
5. If the measurement is out of standard, remove the 56 mm washer and measure its thickness.

6. Select and install a new washer, then recheck the clearance.

7. Measure the clearance between the 4th gear (A) and 39 mm cotters (B) with a feeler gauge (C) in at least three places. Use the average as the actual clearance.
8. If the measurement is out of standard, remove the 52 mm washer and measure its thickness.
9. Select and install a new washer, then recheck the clearance.

WASHER, 52 mm

Countershaft Reassembly

Special Tools Required Driver, 40 mm I.D. 07746-0030100

3. Slide the reverse selector hub (A) over the countershaft (B), then press it into place with the special tool and a press.

NOTE: Some reverse selector hubs are not press-fitted, and can be installed without using the special tool and a press.

4. Install the reverse selector, reverse gear collar, needle bearing, and reverse gear over the reverse selector hub.

5. Install the ball bearing (A) over the countershaft, then press it into place with the special tool and a press.

6. Install the new conical spring washer (A) in the direction shown, and install the new locknut (B).

7. Hold the countershaft with a wrench and a vise securely, and tighten the locknut to 167 Nm (17.0 kgf-cm, 123 ft. lbs.).

NOTE:
- Use a torque wrench to tighten the locknut. Do not use an impact wrench.
- The locknut has left-hand threads.

8. Stake the locknut into its shaft in depth (A) of 0.7 - 1.3 mm (0.03 - 0.05 inch) using a 3.5 mm punch (B).

Secondary Shaft Disassembly

Special Tools Required
- Wrench 40 x 42 mm 07XAA-002010A

NOTE: Refer to the Exploded View as needed the following procedure.

1. Cut the lock tab (A) of the secondary shaft locknut (B) using a chisel (C).

NOTE: Keep all of the chiseled particles out of the secondary shaft.

2. Place a V-block (A) on a vise (B), and put the secondary shaft (C) on the V-block and vise.
3. Attach the special tool onto the 1st clutch guide, and secure the special tool with the vise to hold the secondary shaft. Loosen the locknut, and remove it. Remove burrs from splines on the shaft and spliced washer.

4. Place the idler gear (A) on press bases (B), and place a shaft protector (C) between the secondary shaft (D) and a press to prevent damaging the secondary shaft.
5. Press the secondary shaft out of press-fitted bearing (E), and remove the secondary shaft while holding the underside of the secondary shaft. The secondary shaft falls down when pressing the secondary shaft out of the press-fitted bearing.
6. Remove the 32 mm snap ring, then remove the 2nd clutch.
7. Remove the remaining parts from the secondary shaft.
8. Inspect the bearings for galling and rough movement.
9. Check the shaft bearing surfaces for scoring and excessive wear, and check shaft splines for excessive wear and damage.
10. Check the 1st gear axial clearance, 1st gear one-way clutch, and secondary shaft installation height.

Secondary Shaft 1st Gear Clearance Inspection

Special Tools Required
- Driver, 40 mm I.D. 07746-0030100
- Attachment, 30 mm O.D. 07746-0030300

1. Install the idler gear (A), thrust needle bearing (B), 1st gear collar (C), needle bearing (D), 1st gear assembly (E), thrust needle bearing (F), 52 mm washer (G), and 1st/1st-hold clutch (H) on the secondary shaft (I). Do not install the O-rings during inspection.

2. Install the ball bearing (J) over the 1st/1st-hold clutch guide with the special tools and a press.
3. Install the splined washer (K) with the marked side (L) up over the ball bearing in the same manner as installing the ball bearing with the special tool and a press.
4. Install the old lock nut (M) and tighten it to 29 Nm (3.0 kgf-cm, 22 ft. lbs.).

5. Set the dial indicator (A) on the 1st gear (8).

6. Measure the 1st gear axial clearance in at least three places while moving the 1st gear. Use the average as the actual clearance.

7. If the measurement is out of standard, remove the washer and measure its difference.
8. Select and install a new washer, then recheck the clearance.

WASHER, 52 mm

1st Gear One-way Clutch Inspection

1. Hold the 1st-hold clutch hub (A), and turn the 1st gear (B) in the direction shown to be sure it turns freely. Also make sure the 1st gear locks in the opposite direction.
2. If any problem occurs on the 1st gear one-way clutch, replace the 1st clutch hub (C). The 1st gear one-way clutch is not available separately from the 1stclutch hub.

1st Clutch Hub Replacement

Special Tools Required
- Driver 07749-0010000
- Driver attachment 07947-6340500
- Attachment, 78 x 90 mm 07GAD-SD40101

1. Remove the 1st-hold clutch hub (A) from the 1st gear (B) with the special tools and a press.
2. Remove the 1st clutch hub (C) from the 1st gear, then install the new 1st clutch hub in the 1st gear.

3. Install the 1st-hold clutch hub (A) in the 1st gear (B) with the special tools and a press.

Secondary Shaft Reassembly

Special Tools Required
- Driver, 40 mm I.D. 07746-0030100
- Attachment, 30 mm I.D. 07746-0030300
- Wrench 40 x 42 mm 07XAA-002010A

1. Wrap the shaft splines with tape, and install the new O-rings (A) in the 2nd clutch O-ring grooves, then remove the tape.
2. Install the 2nd clutch (B) on the secondary shaft (C), and secure it with the snap ring (D).
3. Install the thrust needle bearing (E), needle bearing (F), 2nd gear/park gear assembly (G) with aligning the 2nd clutch.
4. Install the thrust needle bearing (H), idler gear (I) in the direction shown, thrust needle bearing (J), 1st gear collar (K), needle bearing (L), 1st gear assembly (M), thrust needle bearing (N), and 52 mm washer (O) in the direction shown.
5. Wrap the shaft splines with tape, and install the new O-rings (P) in the 1st/1st-hold clutch O-ring grooves, then remove the tape.

NOTE: To prevent damage to the O-rings, be sure to install the O-rings after installing the 1st gear collar and 52 mm washer.

6. Install the 1st/1st-hold clutch (Q).

7. Install the ball bearing (R) over the 1st/1st-hold clutch guide with the special tools and a press.

8. Install the new splined washer (A) with the marked side (B) up over the ball bearing with the special tools and a press.

9. Install the new locknut (C).

10. Place a V-block (A) on a vise {B), and put the secondary shaft (C) on the V-block and vise.
11. Attach the special tool onto the 1st clutch guide, and secure the special tool with the vise to hold the secondary shaft. Tighten the locknut to 178 Nm (18.2 kgf-cm, 132 ft. lbs.) with the torque wrench (D).

NOTE: Use a torque wrench to tighten the locknut. Do not use an impact wrench. The locknut has left-hand threads.

12. Stake the locknut into its shaft in depth (A) of 0.7 - 1.3 mm (0.03 - 0.05 inch) using a 3.5 mm punch (B).

Secondary Shaft Installation Height Inspection/Adjustment

1. Install the thrust needle bearing (A) in the torque converter housing (B) in the direction shown, and install the secondary shaft assembly (C).

2. Install the new gasket (A) on the torque converter housing.

3. Measure the height (B) of the secondary shaft installation between the surface (C) of the gasket and the top of the ball bearing outer race (D), then note the measurement.

4. Remove the 65 mm thrust shim (A) from the transmission housing, and measure its thickness.
5. Calculate the thickness of the 65 mm thrust shim using the formula.
Formula:
65 mm Thrust Shim Thickness = Secondary Shaft Installation Height Standard - Measurement
Secondary Shaft Installation Height
Standard: 222.54 - 222.63 mm (8.761 - 8.765 inch)
6. Select the 65 mm thrust shim from the following table.

THRUST SHIM 65 mm

7. Install the thrust shim in the transmission housing.

Intermediary Shaft Disassembly, Inspection, and Reassembly

1. Remove the 26.5 mm washer, snap ring, cotter retainer, and cotters from the third shaft.
2. Remove the intermediary shaft 4th gear using a press, and disassemble the shaft and gears.
3. Inspect the bearings for galling and rough movement.
4. Check the shaft bearing surfaces for scoring and excessive wear, and check shaft splines for excessive wear and damage.
5. Check the sealing rings for excessive wear and damage.
6. Check the 3rd gear axial clearance, and intermediary shaft installation height.
7. Before installing the O-rings, wrap the shaft splines with tape to prevent damage to the O-rings.
8. Lubricate all parts with ATF, and reassemble the shaft and gears.
9. Install the press-fitted 4th gear with the special tool and a press in the direction shown.