Triumph TR2 - Gearbox Operation

GEARBOX
Description
Four forward speeds with gear synchronisation on 2nd, 3rd and Top and one Reverse ratio actuated
by a compound gear which is disengaged when
in Neutral or in any of the forward gears.
OPERATION
A remote control lever is carried in a turret
formed
in the rear end of the top cover,
which is at a point approximately halfway
down the rear extension housing. The
selector forks are mounted on three selector
shafts
which are carried in the gearbox top
cover and both cover and shafts extend
rearwards to the control lever turret where
gear selection is made by conventional
"H7' gate movement.
RATIOS
Gearbox Overall
Overdrive Top 0.82 3.03
%d
1.00 3.70
1 .325 4.90
Second 2.00
7.40
First 3.38 12.50
Reverse 4.28 15.80
BEARINGS
Constant
Pinion Shaft
Bearing (S.M.Co. Part No.. 58391) :
Fischer Ball Bearing No. MS12 S.G.
Hofhan Ball Bearing No. MS12
K.
Mainshaft Centre
Bearing (S.M.Co. Part No. 58391) :
As for Constant Pinion Shaft.
Mainshaft Rear
Bearing (S.M.Co. Part No. SP75 G.) :
Fischer Ball Bearing No. 6206.
Hoffman Ball Bearing No. 130.
Countershaft Cluster
Front : 24 needle rollers retained by
means of two retaining
rings
(press fit).
Rear
: 24 needle rollers retained by
means of two retaining
rings
(press fit).
MOUNTING
Unit assembly with engine which is two
point mounted to
the chassis at front, the
gearbox being mounted on a silent block
under the gearbox extension housing to the
chassis cross member.
OIL CAPACITY
14 pints (0.8 litres) from dry.
With Overdrive 3& pints (2.0 litres).
For recommended grades of oil refer to
Lubricant Recommendations
in the
" General Data " Section.
NUT AND BOLT DATA AND
TIGHTENING TORQUES
For these particulars refer to " General
Data
" Section.
NOTE-For details regarding Special
Tools, please refer to Section
"Q of this Manual.
TO REMOVE GEARBOX LEAVING
ENGINE
IN POSITION
(a) Disconnect battery lead.
(b) Remove both seats by withdrawing
sixteen nuts, eight from beneath each
seat cushion.
(c) Remove gear lever and grommet, after
slackening the locknut and unscrew
gear lever from its ball end.
(d) Withdraw floor centre section and
carpet after the withdrawal of sixteen
setscrews located round the edges of
the pressing. Similarly remove the
"U" plate (R.H. side) secured with two
P.K. screws.
(e) Disconnect the propeller shaft at the
front end by withdrawing the four bolts
and nyloc nuts.
(f) Disconnect speedometer cable from
gearbox by unscrewing the knurled
collar from its adaptor.
(g) Remove clutch slave cylinder with its
mounting bracket after withdrawing
two nuts and bolts from the bell
housing and one sump bolt securing
the steady rod. The slave cylinder push
rod
can be removed from the clutch
operating shaft after the withdrawal of
the split pinned clevis pin from the
operating fork to which is attached rhe
clutch return spring.