Servo (Thm 700-R4); Rear Extension Oil Seal - GMC G Service Manual

7A-74 TRANSMISSION
Pin Is Preset At Factory And Must Not Be Re­
adjusted
2-4 SERVO PIN SELIECTION
PIN LENGTH
mm INCH
66.37-66.67 2.61-2.62
67.74-68.04 2.67-2.68
69.11-69.41
2.72-2.73
Figure 88 — Measuring the Servo Pin Length
(THM 700-R4)
Assemble (Figures 86 and 87)
Tool Required:
J 22269-01 Piston Compressor
1. Retainer and the spring in the piston (233).
• New seals on the piston.
• Retainer ring using J 22269-01.
2. Pin (237).
• New seals on the pin.
3. Retainer ring on the pin.
• Spring and the washer.
4. Housing (230) on the piston (233).
• New seal on the housing.
] Important
• Be sure the proper seals are in the proper posi­
tions (Figure 85).
h H Install or Connect (Figures 84 and 85)
Tool Required:
J 29714-A Servo Cover Compressor
1. Spring (239).
2. 2nd apply piston assembly (301).
3. 4th apply piston (224).
2ND APPLY PISTON & HOUSING APPLICATION
ALL OTHERS
PIN I.D.
2 Rings
3 Rings
Wide Band
L01017
4. New seal on the cover.
5. Cover (223) and the retaining ring using J 29714-A.
6. Transmission fluid if needed. Refer to "Checking and
M
• Raise the vehicle.
1. Transmission fluid.
2. Propeller shaft. Refer to PROPELLER SHAFT
3. Seal.
PISTON
MODEL DIMENSION
*A
63.10 mm
YT, Y6, YK
(2.48")
44.64 mm
YC, YX
(1.78")
57.85 mm
(2.28")
230. Housing, Servo Piston (Inner)
233. Piston, 2nd Apply
Figure 89 — 2nd Apply Piston and Housing
Dimensions (THM 700-R4)
• Raise the transmission if needed. Refer to
'Transmission Replacement" in this section.
• Lower the vehicle.
Adding Fluid" in this section.

REAR EXTENSION OIL SEAL

Remove or Disconnect (Figure 90)
(SEC. 4A).
HOUSING
DIMENSION
64.00 mm
(2.52")
45.54 mm
(1.79")
58.74 mm
(2.31")
B-08730