O. Mainshaft Assembly

^ Tools Required:
- J 25234 Front and Rear Bearing Installer
- J 37360 Spiral Snap Ring Installer
- J 37372 Synchronizer and Gear Installer

NOTICE: If replacing 1st/2nd or 3rd/4th synchronizer blocker rings, soak new blocker ring assemblies for 10 minutes in Dextron (tm)-III or equivalent before assembly on mainshaft.
- Coat mainshaft and gear bores with transmission lubricant.





ASSEMBLE
1. 1st/2nd synchronizer sleeve on mainshaft hub aligning marks made at disassembly.

NOTICE: Use care in synchronizer spring placement. If synchronizer is assembled with improper spring replacement, hard shifting will result.

2. 1st/2nd synchronizer keys and springs.
- Engage tang end of each spring in same synchronizer key, but in position open end of springs opposite of each other.
3. Three piece 1st gear blocker ring assembly.
4. Locating pin into mainshaft.





5. Sleeve and needle bearing into mainshaft, aligning notch in sleeve with locating pin.
6. 1st gear, aligning slots in 1st gear with tabs on blocker ring assembly.
7. Rear mainshaft bearing with taper facing rear of shaft.
- Lubricate 5th gear splines with petroleum jelly.

NOTICE: Carefully align the mainshaft and gear splines. If splines are improperly aligned, damage could occur when the gear is pressed onto the mainshaft.

8. 5th gear onto mainshaft, using J 25234 and a press.
9. 5th gear snap ring.





10. Three piece 2nd gear blocker ring assembly and thrust washer.
11. Spiral snap ring, using J 37360.
12. 2nd gear spacer, needle bearing and gear, aligning slots in 2nd gear with tabs on blocker ring assembly.
13. 2nd gear thrust washer and snap ring.
14. 3rd gear spacer and needle bearing assembly.
- Make sure the bearing spacer is not trapped between the gear face and snap ring. The spacer runs inside the gear bore.
15. 3rd/4th synchronizer, 3rd blocker ring, sleeve, hub and 3rd gear as an assembly, using J 37372 and a press.
16. Thrust bearing and race to front end of mainshaft.

Important
- Before pressing components together, make sure the synchronizer hub faces the short end of the mainshaft. Hold 3rd gear against the synch to maintain blocker ring alignment with keys.