Chevrolet 10 Series 1970 Service Manual page 446

CLUTCHES AND TRANSMISSIONS 7-16
15. Rem ove flyw h eel housing cover. On V -8 engine mod­
els, rem ove exhaust c ro s s o v e r pipe.
16. R em ove tran sm ission to flyw heel housing attaching
bolts.
NOTE:
R em ove upper bolts fir s t and install
tran sm ission guide pins
guide pins w ill preven t damage to the clutch
assem bly.
17. Slide tran sm ission rea rw a rd until main d rive gear
cle a rs the clutch assem bly and lo w er assem bly from
veh icle.
Installation —" K" Series Blazer Models
3 or 4 Speed Transmissions
1. Position tran sm ission , with tra n sfer case attached,
to the flyw h eel housing. Install bolts attaching tran s­
m ission to flyw h eel housing.
2. Install flyw heel housing co ve r and attaching bolts.
On V-8 m odels, install
3. P o sitio n fram e crossm em b er and install retaining
bolts. Install bolts retaining adapter assem bly to
crossm em b er and tra n sfer
bracket.
4. Torque front and re a r tra n sfer case yoke lock nuts to
250 ft. lbs.
5. Install front and r e a r propshafts to tra n sfer case
output yokes.
6. Connect shift control rods to transm ission le v e r s
and connect speedom eter cable to tra n sfer case.
Connect back-up lamp
7. F ill tran sm ission and tra n sfer case to p rop er le v e l
with lubricant sp e c ifie d in the Lubricant Section,
Truck Chassis S e rv ic e
hoist.
8. W orking in cab, install tra n sfer case le v e r using
tool J-8109 (m odified).
9. Install transm ission flo o r cover and attaching bolts.
10. Install heater d istrib u tor duct center outlet.
NOTE:
On m odels with center console, install
console and retaining bolts.
11. Install flo d r mat, tra n s fer case shift le v e r reta in er
and attaching screw s.
Replacem ent—" K" Series Except Blazer
3-Speed Transmission
1. R aise veh icle.
2. D rain tra n sfer case and transm ission. Disconnect
the speedom eter cable
gear fitting, back-up lamp switch and TCS switch
connections.
3. Disconnect p ro p e lle r
case, and tie up out o f way.
4. R em ove cotter pins
c le v is pins to rem ove le v e r - s e le c to r from tran sfer
case.
5. R em ove bolts holding the bracket assem bly, and con­
tr o l le v e r to the adapter assem bly. Push assem bly
to one side.
6. Support tra n sfer case in a suitable cradle.
7. Rem ove bolts attaching tra n sfer case to adapter.
8. R em ove bolts attaching tra n sfer case to fram e b rack­
et at righ t side o f
adapter.
J-1126. Use of the
exhaust c ro s s o v e r pipe.
case to fram e ra il
w irin g and TCS switches.
Manual. L o w er veh icle on
from speedom eter driven
shafts from U -joint yoke at
fro m c le v is pins. Withdraw
case and rem ove case from
9. Disconnect shift control rods from the sh ifter le v e rs
at the transm ission.
10. Support re a r portion
adapter mount bolts.
11. Rem ove the 2 top transm ission to clutch housing
cap screw s and in sert 2 transm ission guide pins,
T o o l J-1126 in these holes.
12. Rem ove flyw heel under pan.
tran sm ission -to-clu tch housing cap screw s.
13. Slide the transm ission and adapter assem bly straight
back on guide pins until the clutch g ea r is fre e o f
splines in the clutch disc.
NOTE: The use o f the 2 guide pins during this
operation w ill support the transm ission and p r e ­
vent damage to the clutch disc through springing.
14. Rem ove transm ission and adapter as an assem bly
from under the body.
15. Rem ove adapter from transm ission.
16. T o install, re v e rs e rem oval p rocedu re.
4-Speed Transmission
1. Follow steps 1-9 outlined under 3-Speed T ra n sm is­
sion R em oval.
2. R em ove seat assem bly.
3. Rem ove a c c e le ra to r pedal and flo o r mat.
4. R em ove the sheet m etal screw s attaching tran sm is­
sion co ver to body flo o r and rem ove cover.
5. R em ove the two top cap screw s attaching the tran s­
m ission to clutch housing and in sert the two Guide
Pins, T o o l J-1126, in these holes.
6. R em ove two (2) adapter mounting bolts.
7. Support re a r o f engine.
8. Rem ove the flyw h eel underpan and rem ove the two
lo w e r transm ission
9. Slide the transm ission
straight back on the guide pins until the clutch gea r
is fre e o f the splines in the clutch disc. The guide
pins in the top holes support the transm ission during
this operation and prevent damage to the clutch disc.
10. Once the clutch gear is clea r o f clutch housing tilt
transm ission and adapter
through flo o r pan opening.
11. Rem ove adapter from transm ission.
12. T o in stall, r e v e r s e rem oval procedu re.
TRANSMISSION ALIGNMENT
In some instances where " e x c e s s iv e " gear whine or
high gea r hop out, p a rticu la rly at 50 M PH and up, are
encountered; and a fter a ll other probable causes have
been checked, an alignment check o f the transm ission and
clutch housing may be helpful.
A special tool, on which a dial indicator is mounted, is
n ecessary to check the transm ission case re a r bore
alignm ent. T h is tool may be made from a new o r good
used clutch gea r which has a good bearin g surface on the
crankshaft pilot end and
location.
The splines on the clutch gear shaft and the teeth on the
clutch gea r should be ground o ff so the shaft may be
rotated in a clutch disc hub without in terferen ce when
assem bled in the car. W eld a piece o f 1/4" rod in the
mainshaft pilot bore long enough to extend out the case
re a r b ore. A ssem b le a good bearin g on the clutch gear
shaft and secure it with the clutch gea r bearin g snap
ring. Attach a suitable dial indicator to the rod.
o f engine. R em ove two (2)
Rem ove the 2 low er
to clutch housing capscrew s.
and adapter assem bly
assem bly and rem ove
at the front main bearing
CHEVROLET TRUCK SERVICE MANUAL