Triumph TR6 PI Operation Manual page 291

OVERDRIVE-J TYPE
OVERDRIVE ASSEMBLY
- Remove and refit 40.20.07
Removing
NOTE: Before commencing overdrive removal it is
advisable to raise the rear wheels and run the transmission.
Engage oWlrdrive, then disengage with the clutch depressed
leaving the overdrive ready for removal. This will release the
spline loading between the planet carrier and the
uni-directional roller clutch which could make removal
difficult.
1. Remove the gearbox and overdrive from the car as
operation number 37.20.01.
2.
Remove the eight
*
in U.N.F. nuts securing the unit
to the adaptor plate.
3.
Remove the overdrive over the mainshaft, leaving the
adaptor plate in position on the gearbox.
If difficulty is experienced in separating the overdrive
from the gearbox, use the following procedure:
Remove the hexagon plug adjacent to the solenoid,
and screw in and tighten tool lA02. Energize the
solenoid, then pressurize the unit by pumping clean
oil through the nipple on the tool with a lubrication
gun. This will release the spline loading on the
mainshaft and permit easy removal. De-energize the
solenoid when the overdrive has separated by about
')4
in (19 mm).
4. Use a screwdriver of suitable length to rotate the
inner member of the uni-directional roller clutch (this
is the innermost set of splines), in an anti-clockwise
direction until the splines of this member are in line
with the splines in the planet carrier.
5. Ensure that the pump cam and sun gear spring ring
are correctly located on the mainshaft.
6. Rotate the gearbox mainshaft so that the peak of the
pump cam is at the bottom to assist engagement with
the pump strap.
7. Engage the bottom gear in the gearbox.
8. Fit a new joint to the front face of the overdrive.
9. Offer up the overdrive to the gearbox.
10. Rotate the output shaft of the unit in a clockwise
direction.
11. At the same time apply siight pressure until the
splines are engaged.
12. Ensure that the pump strap assembly rides smootWy
onto the cam and that the overdrive pushes home to
the adaptor plate face without excessive force.
13. Fit and tighten the eight nuts which secure the unit.
14. If the overdrive fails to meet the adaptor plate face
by approximately 5{8 in (16 mm) it means that the
planet carrier and the uni-directional roller splines
have become mis-aligned. In this case remove the unit
and re-align the splines.
4O.20.07J
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Triumph TR6 Manual. Part No. 545277 Issue I
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