Check Valve Retainer And Ball Assembly - Replacement Procedures - GMC T Series 1994 Repair Manual

3. Overrun clutch spring assembly (634).
4. Overrun clutch piston (632).
• Inner and outer lip seals (631).
5. Forward clutch piston assembly (630).
• Inner and outer lip seals (629).
6. Forward clutch housing (628).
7. The 3-4 clutch spring assembly (626).
8. The 3-4 clutch apply ring (625) and piston (623).
• Inner and outer lip seals (624) from piston.
9. Forward clutch to input housing O-ring seal
(622).
10. Four turbine shaft oil seal rings (619).
,J 23327-1
621 HOUSING AND SHAFT
ASSEMBLY, INPUT
Figure 52 Overrun Clutch Retainer Ring - Removal
l i ? l Inspect
F ig u re s 5 4 a n d 5 5
• Input housing for porosity or damage
• Input housing and shaft assembly (621) for:
- Spline wear or damage.
- Three turbine shaft checkballs.
A. The balls must not be loose or leaking.
B. The open hole is the lube oil passage
which feeds the output shaft.
• Presence of orificed cup plug (698).
• Cracks at lube holes.
• Four turbine shaft oil seal ring grooves for
damage or burrs.
- Seals must fit freely into the ring grooves.
• Check valve retainer and ball assembly (617)
for:
• Feed passages for:
Check Valve Retainer and Ball Assembly -
Replacement Procedures
Figures 53 through
Tools Required:
J 23456
RH0148-4L60-E
|<--»| Remove or Disconnect
Figure 55
1. Straighten the tangs of the retainer and remove
the ball.
2. Check valve retainer.
Install or Connect
Figure 55
• New check valve retainer and ball assembly
(617).
- Damage.
- The ball must move freely in the retainer.
- The retainer must be tight in the turbine
shaft.
- Obstructions - blow air through passages.
6 4
6.3 mm (#4) Screw extractor
9.5 mm (3/8 inch) diameter metal rod
6.35 mm (1/4 inch) diameter rod or drift
hammer
J 23456 Clutch Spring Compressor Press
J 23327-1 Clutch Spring Compressor
J 25018-A Clutch Spring Compressor
Adaptor
J 29882 Overrun Clutch Inner Seal
Protector
J 29883 Forward Clutch Inner Seal
Protector
• Use 6.3 mm (#4) Screw extractor.
A. Use the 9.5 mm (3/8 inch) metal rod.
B. Seat the retainer 3.0 mm (1/8 inch) below
top surface of the turbine shaft.
C. Be certain the ball is loose.