GMC 1989 Light Duty Truck, Repair Manual, Page: 905 / 998

HM-117 TRANSMISSION 7B2-13
Lv
Figure 2 9 —Installing the Drive Gear Bearing
Retainer Oil Seal
Inspect
1. Retainer nose for scoring, wear, or cracks,
especially at the flange.
2. Snap ring groove for damage caused by drive gear
bearing movement.
3. Retainer for wear and damage.
0
- " - i Install or C o nn ect (Figure 2)
Tool Required:
J 22833 Front Housing Drive Gear Seal
Installer
Seal (266), using J 22833. The lip of the seal goes
toward the installing tool, (figure 29).
❖
131
L*
R/V/P SHIFT COVER
Disassemble (Figure 30A)
1
. Three plugs (297).
• Use a punch to drive the plugs out.
Im p o rtan t
• The reverse shift fork retaining pin cannot be
removed until the other shift forks have been
removed.
• Note the positions of the shift forks and the
rods before removing them.
Fork retaining pins (303), (figure 31).
Shift rods and the shift forks (206, 215 and 301).
• Shift rods must be in neutral position before
any one rod can be removed.
• Do not lose the detent balls and springs and
the interlock balls and pin when removing
the rods.
Interlock balls (306) and the pin (304).
Detent balls (213) and the springs (212).
Retainer (302) from the plunger (299).
Plunger (299) and spring (300) from the reverse shift
fork (301).
Clean (Figure 30A)
All parts in solvent and air dry.
Inspect (Figure 30A)
1
. Shift fork
• For damage or bends.
• For worn finger pads.
2. Shift rods
206. 3rd and 4th Shift Fork 305.
212. Detent Spring 306.
213. Detent Ball 307.
214. Reverse Shift Rod
215. 1st and 2nd Shift Fork
268. Shift Cover
295. Spring Pin
296. Vent
297. Plug
298. Dowel Pin
299. Reverse Shift Fork Plunger
one
300. Spring
301. Reverse Shift Fork
302. Retainer
303. Retaining Pin
304. Interlock Pin
3rd and 4th Shift Rod
Interlock Ball
1st and 2nd Shift Rod
295
f *-— 296
305
214
302
F-04632
Figure 30A—R/V/P Shift Cover and Components