Chevrolet Chevelle 1977 Repair Manual page 269

Fig. 7 A - 1 3 7 A - A l i g n i n g Pu m p Cover and Pump Body
5. Inspect stator shaft for damaged splines or damaged
bushings.
6. Inspect orifice plug (see Fig. 7A-135A). If the plug
requires replacement, place new plug, orifice end first, into
plug hole from the rough casting side. Drive the plug flush
to .25mm (.010") below top of hole, rough casting side.
Stake the top of hole two places to retain the plug.
Reassembly
1. Place pum p body over hole in bench.
2. Assemble pump cover to pump body with attaching
bolts, finger tight.
3. Align pump cover and pump body using J-25015
(Fig. 7A-137A) and place bolt or screwdriver through pump
to case bolt hole and bench.
4. Torque pump cover attaching bolts to 20.0-27.0
N -m (15-20 ft. lbs.).
5. Remove J-25015.
6. Install pressure regulator spring, guide, valve with
stem end out, and bore plug, hole side out (Fig. 7A-126A).
7. Compress pressure regulator valve spring by pushing
on bore plug with small screwdriver and install retaining
ring (Fig. 7A-128A).
8. If removed, install 3 new oil seal rings, making sure
cut ends are assembled in the same relationship as cut (Fig.
Fig. 7A-138A— Installing Pump Assembly
AUTOMATIC TRANSMISSION
PUMP
ASSY.
1-25015
GUIDE PINS
7A-120A). Also, make sure rings are seated in the grooves
to prevent damage to the rings during reassembly of mating
part over rings Retain with petrolatum.
9. Install pum p to case seal ring, chamfered side out,
making sure the ring is not twisted.
10. Install pum p to direct clutch thrust washer and
retain with petrolatum (Fig. 7A-127A).
11. Remove holding bolt or screwdriver.
12. Install new pump to case gasket on pump and retain
with petrolatum.
13. Install 2 pump to case alignment pins in case as
shown in Fig. 7A-138A.
NOTE:
Before installing
intermediate band anchor pin lug is aligned with band
anchor pin hole in case.
14. Install pump assembly and finger start pump to case
bolts and new washers, except one bolt hole (Fig. 7A-139A),
which will be used to make the front unit end play check.
NOTE:
If turbine shaft cannot be rotated as pump is
being pulled into place, the forward or direct clutch
housings have not been installed properly to index with
all the clutch plates. This condition must be corrected
before pum p is pulled fully into place.
15. Replace 2 alignment pins with 2 bolts and new
washers.
16. Torque pum p to case bolts to 20.0-27.0 N -m (15-20
ft. lbs.).
NOTE:
Make sure turbine shaft rotates freely.
Check Front Unit End Play (Fig. 7A -139A )
1. Install 278mm (11") bolt and locking nut as shown
in Fig. 7A-139A.
2. Push turbine shaft downward.
3. Install J-25022 on J-24773 tool and locate on end of
turbine shaft (Fig. 7A-139A).
4. M ount dial indicator on bolt and position indicator
point against cap nut of J-24773.
5. Move output shaft forward by turning the adjusting
screw on J-25013-5 until the white or scribed line on sleeve
J-25013-1 begins to disappear, then set dial indicator to
zero.
6. Pull turbine shaft upward, and read end play. Front
unit end play should be 0.56mm-1.30mm (,022"-.051").
NOTE:
Selective washer controlling this end play is
located between the output shaft and turbine shaft. If
more or less washer thickness is required to bring end
Fig. 7 A -1 39 A -C he ckin g Front Unit End Play
(200)7A-33
pump, make sure