Honda Civic. Manual — part 873

Courtesy of AMERICAN HONDA MOTOR CO., INC.

MAINSHAFT INSPECTION

1. Inspect the gear and bearing contact areas for wear and damage, then measure

the mainshaft at points A, B, C, D, and E. If any part of the mainshaft is less
than the service limit, replace it.

Standard:

A Ball Bearing Contact Area (Transmission Housing Side): 27.987-28.000
mm (1.1019-1.1024 in.)

B Distance Collar Contact Area: 31.984-32.000 mm (1.2594-1.2598 in.)

C Needle Bearing Contact Area: 38.984-39.000 mm (1.5348-1.5354 in.)

D Ball Bearing Contact Area (Clutch Housing Side): 27.977-27.990 mm
(1.1015-1.1020 in.)

E Bushing Contact Area: 20.80-20.85 mm (0.819-0.821 in.)

Service Limit:

A: 27.93 mm (1.100 in.)

B: 31.93 mm (1.257 in.)

C: 38.93 mm (1.533 in.)

D: 27.92 mm (1.099 in.)

E: 20.75 mm (0.817 in.)

2008 Honda Civic LX

2006-08 TRANSMISSION Manual Transmission (6-Speed)(Except Hybrid) - Civic

Fig. 114: Inspecting Gear And Bearing Contact Areas
Courtesy of AMERICAN HONDA MOTOR CO., INC.

2. Inspect the runout by supporting both ends of the mainshaft. Then rotate the

mainshaft two complete turns while measuring with a dial gauge. If the runout
is more than the service limit, replace the mainshaft.

Standard:

0.02 mm (0.001 in.) max. Service Limit: 0.05 mm (0.002 in.)

Fig. 115: Inspecting Runout
Courtesy of AMERICAN HONDA MOTOR CO., INC.

MAINSHAFT REASSEMBLY

Exploded View

2008 Honda Civic LX

2006-08 TRANSMISSION Manual Transmission (6-Speed)(Except Hybrid) - Civic

Fig. 116: Exploded View Of Mainshaft
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Special Tools Required

Driver, 40 mm I.D. 07746-0030100

Attachment, 30 mm I.D. 07746-0030300

1. Clean all the parts in solvent, dry them, and apply manual transmission fluid

(MTF) to all contact surfaces except the 3rd/4th and 5th/6th synchro hubs.

NOTE:

Refer to the EXPLODED VIEW, as needed, during this
procedure.

2008 Honda Civic LX

2006-08 TRANSMISSION Manual Transmission (6-Speed)(Except Hybrid) - Civic

2. Install the needle bearing and 3rd gear on the mainshaft.
3. Install the double cone synchro assembly (A) by aligning the synchro cone

fingers (B) with the holes in 3rd gear (C), then install the synchro spring (D).

Fig. 117: Identifying Double Cone Synchro Assembly, Synchro Cone
Fingers, 3rd Gear And Synchro Spring
Courtesy of AMERICAN HONDA MOTOR CO., INC.

4. Install the 3rd/4th synchro hub (A) by aligning the synchro ring fingers (B)

with the grooves in the 3rd/4th synchro hub (C).

Fig. 118: Identifying 3rd/4th Synchro Hub, Synchro Ring Fingers And
3rd/4th Synchro Hub
Courtesy of AMERICAN HONDA MOTOR CO., INC.

5. Install the 3rd/4th synchro hub (A) using the 40 mm I.D. driver (B).

2008 Honda Civic LX

2006-08 TRANSMISSION Manual Transmission (6-Speed)(Except Hybrid) - Civic