Buick LeSabre 1965 Service Manual page 171

CLUTCH, S-M TRANSMISSIONS 46000 SYNCHROMESH 4 - 3 5
SECTION 4-D
3-SPEED- SYNCHROMESH—46000
Paragraph
Subject
CONTENTS OF SECTION 4-D
Page Paragraph
Subject
4-19 Specifications 4-35 4-22 Disassembly and Assembly . . . .
4-20 Description 4-35 4-23 46000 Series 3-Speed Synchromesh
4-21 Removal and Installation 4-39 Trouble Diagnosis
NOTE: 3-Speed Synchromesh Transmission is Standard on 46 Series Cars.
4 - 1 9 TRANSMISSION SPECIFICATIONS
a. Tightening Specifications
Thread
Part Location Size
Page
4-40
4-47
Torque
Ft. Lbs.
Bolt Extension Adapter to Case Special 20-30
Bolt Extension to Case (3 Upper Location) 1/2-13 x 1 5/8 35-45
Bolt Extension to Case (2 Lower Location) 7/16-14 x 1 1/8 20-30
Bolt Upper Flywheel Housing to Cylinder Block 7/16-14 x 1 3/4 45-60
Bolt Lower Flywheel Housing to Cylinder Block 5/16-18 x 1/2 15-20
Screw Lower Flywheel Housing to Upper Flywheel Housing 1/4-20 x 5/8 15-20
Nut Shifter Lever to Shifter Shaft 5/16-18 10-15
Bolt Control Housing to Case 5/16-18 x 7/8 15-20
Bolt Main Drive Gear Bearing Retainer to Case 5/16-18 x 3/4 15-20
b. Transmission Specifications
Mounting Unit with Engine
Oil Capacity 3 1/2 Pints
Type of Gearing All Helical
Transmission Ratios
In First 2.490 to 1
In Second 1.587 to 1
In Third 1 to 1
In Reverse 3.154 to 1
4 - 2 0 S-M TRANSMISSION
DESCRIPTION
The synchromesh transmission is
solidly bolted to the rear face of
the flywheel upper housing, to
form a unit assembly with the
engine. The transmission drive
gear shaft extends the clutch
driven plate into a bronze bushing
seated in the rear end of the
engine c r a n k s h a f t . The front
bearing retainer projects into a
b o r e in the flywheel housing,
serving as a pilot to center the
transmission with the e n g i n e
crankshaft.
a. Transmission Gears and
Shafts
The transmission main drive gear
is supported by a ball bearing
which is a slip fit in the front
wall of the transmission case.
The ball bearing is shielded on
the rear side by a slinger washer.
This washer is held tight against
a shoulder on the drive gear by
the bearing pressed against it.
The bearing is prevented from
moving away from the washer by
a selective fit snap ring in a
groove in the drive gear shaft.
The outer race of the bearing is
grooved for a snap ring which fits
between the transmission case
and the front bearing retainer to
hold the bearing and main drive
gear in place. See Figure 4-77.
The front end of the transmission
main shaft is piloted in the bored
rear end of the main drive gear
by 14 loose rollers. The rear end
of the main shaft is supported by
the transmission r e a r bearing
which is a slip fit in the rear wall
of transmission case. The outer
race of the rear b e a r i n g is
grooved for a snap ring which fits