Pontiac Fiero 1988 Service Manual page 812

AUTOMATIC TRANSAXLE
125C-25
APPLY SIDE
A PISTON
B INNER SEAL
C OUTER SEAL
H 125C-97-3
Figure 58 Typical Lo and Reverse Clutch Apply Piston
649 HOUSING, LO-REVERSE
653 PISTON AND SEAL ASM.
Figure 59 Installing the Lo & Reverse Piston
LO AND R E V E R S E C L U T C H FUNCTIONAL
AIR CHECK
Apply air (max 90 psi) to feed hole. Piston must
apply and release when pressure is removed.
Figure 60 Installing the Lo & Reverse Clutch
Install or Connect (Figure 60)
L Lo and reverse clutch housing (649) with J-28542
into case (J-34008 Available)
Align the clutch housing oil feed hole with
the case feed hole.
If housing (649) does not go past snap
ring groove - remove J-28542 and
install sun gear (646). Rotate sun gear
back and forth until the housing is
properly positioned. Loosen J-26958
as needed.
2. Snap ring (647) - ring is 2.36 mm (0.092") thick.
REACTION SUN GEAR
|W Inspect (Figure 65)
• Reaction sun gear (646) for cracks, splits,
damaged splines, worn gear or journal and
plugged lubrication holes.
p+|
Install or Connect
• Sun gear (646) and selective snap ring (644).
Selective
Snap Ring End Play
Measure (Figures 61 and 62)
Tools Required:
J-26958 Loading tool
J-26958-11 Bracket
J-26958-10 Adapter plug
J-28588 Gage
J-25025-7 Post
J-26900-12 or J-8001M Dial indicator
1. Install the tools as shown.
The loading tool should still be in place.
2. Seat sun gear (646).
3. Position the gage extension between open ends of
snap ring (644).
4. Swing the gage under the extension shoulder.
5. Set the dial indicator at zero.
6. Position the snap ring (644) under extension
shoulder.
7. Remove the gage from under the shoulder.
8. The dial indicator should read 0.33 to 0.13 mm
(0.013" to 0.005"). If not within tolerances, for
correct selection see Figure 62 (Measure washer
thickness (new or used) with micrometer).
1 EXTENSION
2 FEELER GAUGE
J-26900-12 OR
J-8001-M
-J-25025-7
H 1 2 5 - 2 9 *
Figure 61 Selective Snap Ring End Play (Sun Gear/input
Drum)
Lo Roller Clutch Race Selective Spacer End Play
p | | Measure (Figures 63 and 64)
Tools Required: