GMC 1989 Light Duty Truck, Repair Manual, Page: 880 / 998

7B1-42 HM-290 MANUAL TRANSMISSION
NOTE: / "
TAPER ON 3 -4
f V
FORK UP
J 3 6 5 1 5 ‘ j
J 3 6 5 1 5 -1 2
4
5
37
38
4 6
53
100
108
111
SHAFT ASSEMBLY, M AIN (2W D)
SHAFT ASSEMBLY, M AIN (4W D)
RACE, BEARING ASSEMBLY (OUTER)
RACE, BALL BEARING (OUTER)
IDLER ASSEMBLY, REVERSE
COUNTERSHAFT ASSEMBLY, (MG 5)
RAIL ASSEMBLY, 1ST & 2ND SHIFT
FORK, 3RD & 4TH SHIFT
RAIL ASSEMBLY, 5TH & REVERSE SHIFT
K H 0083-H M 290
Figure 71 C o u n te rsh aft an d Reverse Idler A s s e m b ly
Install
!. Threaded thrust (inner) ring (41) and threaded
thrust (outer) ring (39).
• M AK E SURE TH E OLD SPIRAL ROLL
PIN
(42) IS REMOVED FROM
TH REA D ED THRUST R IN G (OUTER)
(39)
Important
Screw the rings together completely, then
back the rings off till BOTH ID SLOTS
FOR TH E BALL (40) LIN E UP.
Slide the assembled rings over the ball that
is retained on the output shaft.
• Slide up the rod on
J
36516, turn the black depth
locating tang over, slide the rod through (so the
roll pin will be installed to the correct depth).
• M AK E CLEARANCE FOR TH E SNAP
R IN G BY FIRST screwing the rings together
completely by turning J 36516 counterclockwise.
9. NEW snap ring (43) (2.00mm thickness).
10. Turning
J
36516 clockwise, torque to 15 N*m (12
Lb. Ft.) then ADVANCE to the next spiral roll
pin notch.
• Hold the countershaft against the mainshaft
while setting torque on 2WD models.
11. NEW spiral roll pin (42).
• Install roll pin in the bottom of
J
36516,
retain with petroleum jelly.
• Put
J
36516 on with the roll pin hole and
roll pin lined up.
• Drive roll pin into thrust ring (outer).
• Remove tool.