Gearbox - Triumph TR6 PI Operation Manual

SYNCHROMESH GEARBOX
GEARBOX
Service tools: RG.421, S4235A-2, S314, S4221A-15A, S67A,
S167.
1. Remove the gearbox 37.20.01 and drain the oil.
Dismantling
2. Unscrew and remove eight bolts.
3. lift off the top cover and gasket.
4. Remove the clutch release mechanism 33.25.12.
5. Take out four setscrews and washers.
6. Tape over the constant pinion splines and remove the
front bearing plate and gasket.
7. Remove the peg bolt and withdraw the speedometer
drive pinion assembly (If overdrive is fitted, perform
operation 40.20.07, remove the overdrive cam and
adaptor plate and continue from para. 13).
8. Using tool No. RG421 to retain the flange, unscrew
the nut.
9. Remove the flange.
10. Unscrew the bolts.
II. Remove the rear extension and gasket.
12. Remove the thrust washer.
13. Take out two screws.
14. Remove the countershaft front plate and gasket.
15. Take out the cross recessed head screw.
16. Remove the retaining plate.
17. Withdraw the countershaft spindle and allow the
cluster to drop to the bQttom of the box.
18; Using tool No. S4235A-2 withdraw the cQnstant
pinion assembly.
19. Fit the abutment tool No. 8314.
- Overhaul 37.20.04
18
J
NT2BBB"
37.20.04 Sheet 1
Triumph TR6 Manual. Pan No. 545277 Issue I