Chevrolet 10 1971 Series Chassis Service Manual page 285

9. Remove the 2 top transmission to clutch housing cap
screws and insert 2 transmission guide pins, Tool
J-1126 in these holes.
10. Remove flywheel under pan. Remove the 2 lower
transmission-to-clutch housing cap screws.
11. Slide the transmission and adapter assembly straight
back on guide pins until the clutch gear is free of
splines in the clutch disc.
The use of the 2 guide pins during this
NOTE:
operation will support the transmission and pre­
vent damage to the clutch disc through springing.
12. Remove the transmission and adapter as an assem­
bly from under the body.
13. Remove adapter from transmission.
14. To install, reverse removal procedure.
4-Speed Transmission— Removal
1 „ Remove attaching screws from transfer case shift
lever boot retainer and remove retainer.
2. Remove floor mat or carpeting from compartment.
3. Remove attaching screws from transmission shift
lever boot retainer. Slide boot and retainer up lever
and remove transmission shift lever using Tool
J-8109 as shown in Figure 11.
4. On Blazer models remove center floor outlet from
heater distributor duct.
On Blazer models equipped with a cen­
NOTE:
ter console, remove console before proceeding
to next step.
5. Remove transmission floor cover attaching screws
and cover. Rotate cover approximately 90° to clear
transfer case shift lever while lifting cover from
vehicle.
6. Disconnect shift lever link assembly from transfer
case shift rail connecting rod. Remove shift lever
attaching bolt and shift lever control from adapter.
7. Disconnect back-up lamp wiring from switch and
remove attaching clamp from top cover bolt.
8. Raise and support vehicle on hoist. Support engine
with suitable floor stand. Drain transfer case and
transmission assemblies.
9. Disconnect speedometer cable from transfer case.
Disconnect back-up lamp switch wiring and TCS
switch.
10. Disconnect prop shaft at rear of transfer case and
tie up away from work area.
11. Disconnect front prop shaft from transfer case and
tie up away from work area.
12. Open lock tabs and remove transmission mount-to-
frame crossmember bolts. Also remove transfer
case-to-frame bracket attaching bolts.
13. Support transmission and transfer case assembly
with suitable floor stand.
14. Remove frame to crossmember bolts and remove
crossmember from vehicle. Rotate crossmsmber to
clear frame rails.
15. Remove flywheel housing cover.
models, remove exhaust crossover pipe.
16. Remove transmission to flywheel housing attaching
bolts.
Remove upper bolts first and install
NOTE:
transmission guide pins J-1126. Use of the guide
pins will prevent damage to the clutch assembly.
17. Slide transmission rearward until main drive gear
clears the clutch assembly and lower assembly from
vehicle.
4-Speed Transmission— Installation
1. Position transmission, with transfer case attached
to the flywheel housing. Install bolts attaching trans­
mission to flywheel housing.
2. Install flywheel housing cover and attaching bolts. On
V-8 models, install exhaust crossover pipe.
30 Position frame crossmember and install retaining
bolts. Install bolts retaining adapter assembly to
crossmember
bracket. Torque all bolts to specification.
4. Torque front and rear transfer case yoke lock nuts
to 250 ft. lbs.
5. Install front and rear propshafts to transfer case
output yokes.
6„ Connect the speedometer cable, back-up lamp wiring
and TCS switches*
7. Fill transmission and transfer case to proper level
with lubricant specified in the lubricant section,
Truck Chassis Service Manual.
8. Install transfer case shift lever assembly and at­
taching bolt. Connect shift lever link to shift rail
bar.
9. Install transmission floor cover and attaching bolts.
10. Install heater distributor duct center outlet.
NOTE:
console and retaining bolts.
11. Install floor mat, transfer case shift lever retainer
and attaching screws.
12. Install transmission shift lever.
TRANSM ISSIO N ALIGNMENT
In some instances where "excessive" gear whine or
high gear hop out, particularly at 50 MPH and up, are
encountered; and after all other probable causes have
been checked, an alignment check of the transmission and
clutch housing may be helpful.
A special tool, on which a dial indicator is mounted, is
necessary to check the transmission case rear bore
alignment. This tool may be made from a new or good
used clutch gear which has a good bearing surface on the
crankshaft pilot end and at the front main bearing
location.
The splines on the clutch gear shaft and the teeth on the
clutch gear should be ground off so the shaft may be
rotated in a clutch disc hub without interference when
assembled in the car. Weld a piece of 1/4" rod in the
mainshaft pilot bore long enough to extend out the case
rear bore. Assemble a good bearing on the clutch gear
shaft and secure it with the clutch gear bearing snap
ring. Attach a suitable dial indicator to the rod.
Procedure
1. Remove the transmission from the vehicle and com­
On V-8 engine
pletely disassemble, except for the reverse idler
gear.
or pilot bearing is excessively loose or worn,
the pilot bearing should be replaced before
checking the transmission case rear bore align­
ment by the dial indicator method.
CLUTCHES AND TRANSMISSIONS 7-9
and transfer
On models with center console, install
In any case where the clutch gear pilot
NOTE:
10-30 CHEVROLET TRUCK SERVICE MANUAL
case to frame rail