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MANUAL TRANSMISSIONS
78-31
15. Install speedometer driven gear in rear extension.
3. Slide crossmember forward and install four (4) bolts.
Installation of Transmission
1. Place transmission on guide pins and rotate
transmission as necessary to start main drive gear splines into
clutch driven plate. Slide transmission forward.
NOTE: Make certain that main drive gear shaft is
aligned with pilot bearing in crankshaft and that clutch
release bearing is properly installed.
2. Install two (2) lower transmission-to-clutch housing
bolts. Remove guide pins and install two (2) upper bolts.
Torque bolts evenly to 55 lb. ft.
Torque to 25 lb. ft.
4. Lower engine-transmission and install crossmember-
to-transmission mount bolts and catalytic converter-to-
transmission bracket bolts. Tighten all bolts to specified
torque.
5. Connect linkage and adjust as described under
MAINTENANCE AND ADJUSTMENTS.
On floor shift controlled vehicles, install shifter assembly
to shifter support and secure with two (2) shifter assembly-to-
support bolts. Torque upper bolt to 45 lb. ft. and lower bolt
to 25 lb. ft.
6. Connect speedometer cable and TCShack-up light
connector.
7. Install propeller shaft and re-fill transmission with
lubricant.
8. Lower vehicle and, after vehicle is road tested, re-
check lubricant level and add as required.
4-SPEED 76MM LT. DUTY MUNCIE TRANSMISSION
INDEX
Removal of Transmission
................................................................................
7B-3 1
Disassembly of Transmission
..........................................................................
7B-3 1
Disassembly of Mainshaft
...............................................................................
7B-32
Cleaning and Inspection
................................................................................
7B-33
Transmission Case
...................................................................................
7B-33
Bearings
......................................................................................................
7B-33
Bearing Rollers
...........................................................................................
7B-33
Gears
............................................................................................................
7B-33
Reverse Idler Gear Bushing
........................................................................
7B-33
Countergear Anti-Lash Plate
......................................................................
7B-34
Repairs
.............................................................................................................
7B-34
Clutch Keys and Springs Replacement
......................................................
7B-34
Extension Oil Seal or Bushing
....................................................................
7B-34
Clutch Bearing Retainer Oil Seal
...............................................................
7B-34
Assembly of Mainshaft
....................................................................................
7B-34
Assembly of Transmission
..............................................................................
7B-35
Installation of Transmission
............................................................................
7B-37
Removal of Transmission
6. Raise transmission to take weight off support and
Before raising vehicle, disconnect battery and release
parking brake.
1. Raise vehicle on hoist and drain lubricant from
transmission.
2. Scribe a mark on companion flange yoke and propeller
shaft yoke to assure proper reassembly and remove propeller
shaft.
3. Disconnect speedometer cable and TCShack-up light
connector.
4. Disconnect transmission control rod and lower
assemblies from the shifter shafts. Tie rods up out of work
area.
5. Remove crossmember-to-transmission mount bolts,
catalytic converter-to-transmission bracket and remove
crossmember-to-frame bolts.
remove crossmember from vehicle.
7. Remove upper transmission-to-clutch housing bolts
and install aligning Guide Pins J 1126 (or 1/2"-13 x 2"
threaded headless bolts).
NOTE: Aligning guide pins or studs must be used to
support transmission in order to prevent distortion of the
clutch driven plate hub while removing transmission.
8. Slide transmission straight back on guide pins until
main drive gear splines are free of clutch driven plate and
remove from vehicle.
DISASSEMBLY OF TRANSMISSION
1. Remove case cover attaching bolts and case cover
assembly.
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