GMC T Series 1994 Repair Manual page 703

61 BOLT, REAR SERVO COVER
62 COVER, REAR SERVO
63 GASKET, REAR SERVO COVER
64 CLIP, RETAINING (BOTTOM)
65 PISTON, REAR SERVO
66 RING, OIL SEAL ACCUM . PISTON (OUTER)
67 RING, OIL SEAL ACCUM . PISTON (INNER)
68 PISTON, REAR ACCUMULATOR
69 SEAL, REVERSE SERVO PISTON
70 WASHER, SERVO PISTON
71 SPRING, REAR SERVO
72 RETAINER, REAR PISTON SPRING
73 PIN, REAR BAND APPLY (SELECTIVE)
74 SPRING, REAR ACCUMULATOR
BAND APPLY PIN CHECK
Figures 7 ,8 and 9
Tools Required:
J 21370-10 Gage Pin
J 38737 Band Apply Pin Checking Tool
|^j[| Measure
1. Place J 21370-10 in the servo bore.
2. Position J 38737 over the bore with the hex nut
facing the parking pawl linkage.
3. Fasten with two rear servo cover bolts (61) and
torque to 24 N*m (18 lb. ft.).
4. Make sure J 21370-10 gage pin moves freely in
the tool and pin bore.
5. To determine correct pin length apply 34 N*m
(25 lb. ft.) torque to the nut on the gage.
6. For pin selection, see Figure 8.