Mainshaft
Tools Required
|     •  | J 39371 
 1st/2nd Synchronizer Installer  | 
 
|     •  | J 39473 
 Mainshaft Bearing Installer | 
 
- Install the 3rd speed gear caged needle bearing and the spacer.
 
- Check the 3rd/4th speed gear synchronizer assembly scribe marks for correct positions.
 
- Install the 3rd/4th synchronizer assembly as follows:
 
| 3.1.  | Start the press operation. | 
 
| 3.2.  | STOP pressing before the keys engage the blocking ring slots. | 
 
| 3.3.  | Lift and rotate the 3rd speed gear in order to engage the keys with the blocking ring. | 
 
| 3.4.  | Continue pressing until the synchronizer is seated. | 
 
- Install the following parts in order, using the 
J 36183 
 , the 
J 36184 
 , and a hydraulic press:
 
| 4.4.  | The 3rd speed gear inner cone | 
 
| 4.5.  | The 3rd speed gear friction cone | 
 
| 4.6.  | The 3rd speed gear blocking ring | 
 
| 4.7.  | The 3rd/4th speed gear synchronizer assembly (the groove on the sleeve faces the 3rd speed gear). | 
 
- Install in the following order:
 
| 5.1.  | 4th gear blocking ring | 
 
| 5.2.  | 4th gear friction cone | 
 
| 5.4.  | 4th gear thrust washer | 
 
| 5.5.  | 3rd/4th synchronizer retainer ring | 
 
- Install a new mainshaft small tapered bearing, using the 
J 39473 
 , V-blocks, and a hydraulic press.
 
- Install the 2nd speed gear caged needle bearing and bearing spacer.
 
- Do the following when installing the 1st/2nd synchronizer assembly:
 
| 8.1.  | Start the press operation. | 
 
| 8.2.  | Stop pressing before the keys engage the blocking ring slots. | 
 
| 8.3.  | Lift and rotate the 2nd speed gear in order to engage the keys with the blocking ring. | 
 
| 8.4.  | Continue pressing until the synchronizer is seated. | 
 
- Install the following parts in order using the 
J 39371 
 and a hydraulic press:
 
| 9.2.  | The 2nd speed gear inner cone | 
 
| 9.3.  | The 2nd speed gear friction cone | 
 
| 9.4.  | The 2nd speed gear blocking ring | 
 
| 9.5.  | The 1st/2nd synchronizer assembly (The ID groove on the sleeve faces the 1st speed gear.) | 
 
- Install the following parts in order:
 
- Install the following parts in order:
 
| 11.1.  | The 1st speed gear bearing spacer | 
 
| 11.2.  | The 1st speed gear caged needle bearing | 
 
| 11.4.  | The mainshaft large tapered bearing and the O-ring seal | 
 
Input Shaft
Tools Required
- Install a new bearing
race on the input shaft, using the 
J 28537-17 
  and a hydraulic  press.
 
- Install a new tapered
bearing on the input shaft. Use the 
J 25234 
 and a hydraulic   press.