Honda Civic Service Manual: M/T Mainshaft Assembly Clearance Inspection (R18Z1 M/T)

1.

Remove the change lever assembly (A).

2.

Remove the 8 x 10 mm dowel pins (B).

1.

Remove the back-up light switch (A) and the 18 mm sealing washer (B).

1.

Remove the output shaft (countershaft) speed sensor (A), the plain washer (B), and the O-ring (C).

1.

Remove the detent bolts (A), the 12 mm sealing washers (B), the detent ball springs (C), and the steel balls (D).

2.

Remove the 8 mm flange bolts in a crisscross pattern in several steps.

3.

Remove the 32 mm sealing cap (A).

4.

While expanding the 69 mm snap ring (B) on the countershaft ball bearing with snap ring pliers, lift the transmission housing (C).

5.

Release the snap ring pliers, and remove the transmission housing.

6.

Remove the 14 x 20 mm dowel pins (D).

1.

Remove the reverse shift fork (A).

1.

Remove the reverse idler gear (A) and the reverse idler gear shaft (B).

1.

Apply a thin layer of tape to the mainshaft splines to protect the seal.

NOTE: Do not apply too much tape as it will damage the oil seal.

2.

Remove the mainshaft assembly (A) and the countershaft assembly (B) with the shift fork assembly (C) from the clutch housing (D).

3.

Remove the 26 mm washer (E).

4.

Remove the 36 mm spring washer (F).

1.

Support the bearing inner race with an appropriate sized socket (A), and push down on the mainshaft (B).

2.

Measure the clearance between 2nd gear (C) and 3rd gear (D) with a feeler gauge (E).

3.

Measure the thickness of 3rd gear.

4.

Measure the clearance between 4th gear (A) and the 4th/5th gear distance collar (B) with a dial indicator (C).

5.

Measure the length of the 4th/5th gear distance collar as shown.

6.

Measure the thickness of 4th gear.

7.

Measure the clearance between the 4th/5th gear distance collar (A) and 5th gear (B) with a dial indicator (C).

8.

Measure the length of the 4th/5th gear distance collar as shown.

9.

Measure the thickness of 5th gear.

10.

Measure the length of the MBS distance collar.

If the length is not within the standard, replace the MBS distance collar.

1.

Install the 36 mm spring washer (A).

NOTE: Be sure to install the spring washer in the direction shown.

2.

Install the 26 mm washer (B).

3.

Apply a thin layer of tape to the mainshaft splines (C) to protect the seal.

NOTE: Do not apply too much tape as it will damage the oil seal.

4.

Install the mainshaft assembly (D) and the countershaft assembly (E) with the shift fork assembly (F), as an assembly.

1.

Install the reverse idler gear (A) and the reverse idler gear shaft (B).

1.

Install the reverse shift fork (A).

1.

Clean any dirt or oil from the mating surface of the transmission housing and the clutch housing.

2.

Apply liquid gasket, P/N 08717-0004, 08718-0001, 08718-0003, 08718-0004, or 08718-0009 evenly to the clutch housing mating surface of the transmission housing. Install the component within 5 minutes of applying the liquid gasket.

NOTE:

3.

Install the 14 x 20 mm dowel pins (A).

4.

Set the tapered cone ring pawl (B) faces the 5th shift fork (C).

5.

Place the transmission housing on the clutch housing, making sure to line up the shafts.

6.

While expanding the 69 mm snap ring (D) on the countershaft ball bearing using snap ring pliers, push the transmission housing down to start the countershaft ball bearing through the snap ring.

7.

Release the pliers, and push down the housing until it bottoms out and the snap ring snaps in place in the countershaft ball bearing snap ring groove.

NOTE: Install the 32 mm sealing cap (E) after setting in the 69 mm snap ring.

8.

Make sure the 69 mm snap ring (A) is securely seated in the groove of the countershaft bearing.

Dimension as installed: 3.3－6.5 mm (0.130－0.256 in)

9.

Apply liquid gasket, P/N 08717-0004, 08718-0001, 08718-0003, 08718-0004, or 08718-0009 evenly to the threads of the 32 mm sealing cap. Install the component within 5 minutes of applying the liquid gasket.

NOTE:

10.

Install the 8 mm flange bolts finger-tight.

11.

Tighten the 8 mm flange bolts in a crisscross pattern in several steps.

12.

Install the steel balls, the detent ball springs, and the detent bolts (A) with new 12 mm sealing washers (B).

1.

Install the output shaft (countershaft) speed sensor (A) with a new O-ring (B) and the plain washer (C).

1.

Install the back-up light switch (A) with a new 18 mm sealing washer (B).

1.

Clean any dirt or oil from the mating surface of the change lever assembly and the transmission housing.

2.

Apply liquid gasket, P/N 08717-0004, 08718-0001, 08718-0003, 08718-0004, or 08718-0009 evenly to the transmission housing mating surface of the change lever assembly. Install the component within 5 minutes of applying the liquid gasket.

NOTE:

3.

Install the 8 x 10 mm dowel pins (A).

4.

Install the change lever assembly (B).