Mainshaft

DISASSEMBLED VIEW

DISASSEMBLY





1. 3rd-4th synchronizer assembly, blocking ring and 3rd gear.
- Scribe an alignment mark on both the 3-4 synchronizer hub and sleeve. Use these marks for correct reassembly.
- Using a hydraulic press and the bearing and gear puller plate J-22912-01, remove the 3-4 synchronizer assembly (1), block ring (1) and the 3rd gear (1).





2. Remove needle bearing (2) and spacer (2).





3. Second gear snap ring (3), using a pair of snap ring pliers.
4. Remove thrust washer (4).





5. Remove 2nd gear (5), bearing (5) and spacer (5).





6. Remove spiral retaining ring, using a pocket screwdriver.





7. Remove thrust washer (7) and 2nd blocking ring assembly (7) (inner cone, outer cone race & 2nd blocking ring).
8. Scribe an alignment mark on both the shaft and hub (14) and reverse sliding gear (8). Use these marks for correct reassembly.
Remove the reverse sliding gear (8) from shaft and along with these parts:
The three keys
One of the two springs.

NOTE: Do not attempt to remove the 1-2 synchronizer hub from the mainshaft.





The hub and shaft are permanently assembled and machined as a matched set.





9. Remove the 5th driven gear snap ring (9) from the rear of mainshaft, using a pair of snap ring pliers. Using a hydraulic press and the bearing and gear puller plate J-22912-01, remove the fifth driven gear (9) from the mainshaft.





10. Remove the mainshaft rear bearing (10) from the shaft.





11. Remove 1st gear (11).





12. Remove 1st gear bearing (12) and sleeve (12).





13. Remove the three-piece first blocking ring assembly (13). Also remove the remaining synchronizer spring from mainshaft (with 1-2 hub) (14).

REASSEMBLY





1. Assemble the three synchronizers. Make sure that the hubs and sleeves are matched and that the inserts are installed properly. Attach the hooked ends of the springs to the same inserts and install them in opposite directions. Also align blocking rings with inserts during installation steps.

NOTE: Soak the paper-lined blocking rings in DEXRON III before installing them.

2. Install the three-piece blocking ring assembly (13) for 1st speed.
3. Install 1st bearing sleeve (12) and bearing (12).
4. Install 1st gear (11). Make sure blocking rings align with inserts.





5. Install mainshaft rear bearing (10).





6. Using a hydraulic press and the installer J-25234, install the 5th driven gear (9) on the mainshaft. Support the mainshaft with the mainshaft support J-5590. While the mainshaft is still on the press bed, install the snap ring (9) for the fifth driven gear. If it does not fit, continue pressing the 5th driven gear until it is fully seated.
7. Install the three-piece 2nd blocking ring assembly (7) for 2nd speed. Install the thrust washer (7) for the blocking ring inner cone.





8. Install spiral retaining ring (6) by using spiral snap ring installer J-37360.
9. Install 2nd speed gear spacer (5), bearing (5) and 2nd gear (5).
10. Install thrust washer (4) and snap ring (3).
11. Install 3rd gear spacer (2) and needle bearing (2).
12. Install the 3rd gear (1) and the 3rd speed blocking ring (1).





13. Install the 3-4 synchronizer assembly (1). Use a hydraulic press and synchronizer & gear installer J-37372 to press the hub onto the mainshaft. Be sure to align the blocking ring with the synchronizer inserts while installing the hub.