86
PLATE CR
GEARBOX GEARS AND SHAFTS,
AFTER 1973
TRIUMPH TR6
GEARBOX GEARS AND SHAFTS , AFTER1973
Please Note:
This section covers gearboxes fitted to cars
approx. The gear set used in this range of gearboxes
may be identified by the following characteristics. See
Section CM for a full discussion of these characteristics.
1.
Input gear utilizes slide-in needle bearing.
2.
First speed countershaft gear is the later type with
seventeen teeth.
3.
All mainshaft gears have symmetrical dog teeth.
4.
Bushes made of bearing steel were fitted inside first;
second; and third mainshaft gears as opposed to
bronze bushes which had been fitted to earlier
gearboxes. The oil holes in the gears lined up with
the grooves in the bushes.
5.
Both synchronizer sleeves will have grooves which are
enlarged at each end to accommodate the large
dog teeth on the mainshaft gears.
6.
All of the gears with the exceptions of the third
mainshaft gear and the third countershaft gear have
the late tooth profile on their meshed teeth.
7.
The second gear adjusting washer is much thicker in
this range of gearboxes, nearly one-tenth of an inch
thicker. The second gear bush is correspondingly
shorter to make up this difference and still fit inside
the same gearbox housing. In addition, the adjusting
washer is prevented from spinning on the mainshaft
by a steel ball which fits into an indentation in the
mainshaft.
8.
The commission number sequence specified for this
range of gearboxes should be considered
approximate, but it is based upon the only sources
available. It should be noted that an A-type overdrive
mainshaft is included in this section, although the
factory ended fitting of A-type overdrives in 1972!
Mainshaft,
non-overdrive
1
Mainshaft,
A-type overdrive
1
Mainshaft,
J-type overdrive
1
REAR FLANGE DETAILS
Flange,
mainshaft
1
HARDWARE,
securing flange to rear of mainshaft
Washer,
plain
1
Nut,
nyloc
1
REAR BEARING DETAILS
Washer,
locating bearing
1
Bearing,
mainshaft rear
1
Plate No.
Part No.
Description
No. Off
CENTER BEARING DETAILS
Bearing,
mainshaft, center
1
Circlip,
large, locating bearing in gearbox housing
1
Circlip,
small, locating bearing on mainshaft
1
Washer,
between small circlip and bearing
1
FIRST SPEED MAINSHAFT GEAR DETAILS
Washer,
between first gear and center mainshaft
1
bearing
First Speed Mainshaft Gear,
32 teeth
1
Bush,
steel, inside first gear
1
ADJUSTING WASHERS,
between first gear and shoulder
on mainshaft
Washer,
.118 inch thick, silver
A/R
Washer,
.121 inch thick, green
A/R
Washer,
.124 inch thick, blue
A/R
Washer,
.128 inch thick, orange
A/R
Washer,
.131 inch thick, uncolored
A/R
Washer,
.133 inch thick, yellow
A/R
FIRST/SECOND SYNCHRO DETAILS
SYNCHRO HUB AND SLEEVE AND REVERSE
1
MAINSHAFT GEAR ASSEMBLY
Spring,
in hub
3
Ball,
steel, in hub
3
Synchro Cup,
first and second gears
2
SECOND SPEED MAINSHAFT GEAR DETAILS
ADJUSTING WASHERS,
between rear of second gear
and shoulder on mainshaft
Washer,
.197-.199 inch thick
A/R
Washer,
.200-.202 inch thick
A/R
Washer,
.203-.205 inch thick
A/R
Washer,
.206-.208 inch thick
A/R
Ball,
steel, locating adjustment washer
1
Second Speed Mainshaft Gear
1
Bush,
steel, top hat, inside second gear
1
THIRD SPEED MAINSHAFT GEAR DETAILS
Third Speed Mainshaft Gear
1
Bush,
steel, inside third gear
1
Circlip,
retaining third gear on mainshaft
1
Washer,
splined, between circlip and third gear
1
THIRD/FOURTH SYNCHRO DETAILS
SYNCHRO HUB AND SLEEVE ASSEMBLY
1
Spring,
in hub
3
Ball,
steel, in hub
3
Synchro Cup,
third and fourth gears
2
(Continued on next page.)
Plate No.
Part No.
Description
No. Off
