Copyright © 1996 General Motors Corp. 3–7
PREVENTIVE MAINTENANCE
PREVENTIVE MAINTENANCE
3–10. TRANSMISSION FLUID AND
FILTER CHANGE PROCEDURES
a. Disassembly
(Foldout 12,B)
(1) The transmission should be at operating
temperature to assist draining. Shift the transmission
to
N
(Neutral) or
P
(Park) and turn off the engine.
(2) Drain the transmission fluid by removing
the drain plug and washer and disconnecting the fill
tube from the oil pan.
(3) Remove twenty-one washer-head screws
28 or 31 that retain oil pan 26 or 33 to the transmission
housing. Discard pan gasket 22, 39, or 47. Clean pan
26 or 33 with mineral spirits.
(4) Remove the screw or bolt and washer
that retains internal filter assembly 21, 38, or 46. Re-
move the filter and intake tube 18, 40, or 48. Remove
sealring 20, 37, or 45 and discard.
(5) Clean or replace governor circuit screen
12. The screen is located in the governor feed tube
bore. Replacement of the screen can only be accom-
plished by removing governor feed tube 13. This tube
and the two remaining tubes are held in place by the
main control valve body. Refer to Paragraph 5–3
h
for
main control valve body removal procedures and Para-
graph 7–10
a
for main control valve body installation.
b. Assembly
(Foldout 12,B)
(1) Install a new sealring onto the top end of
the intake tube. Lubricate the sealring with transmis-
sion fluid.
(2) Insert the intake tube and sealring into
the hole in the bottom of the transmission. Install new
filter assembly 21, 38, or 46 (including grommet) onto
the intake tube.
(3) If deep pan 33 is used, retain the filter
(earlier models) with one
5
⁄
16
-18 x 2
1
⁄
4
inch bolt and
one
5
⁄
16
inch washer. For later models with high-capac-
ity filter, install the
5
⁄
16
-18 x
5
⁄
8
inch washer-head
screw. If shallow pan 26 is used, retain the filter with
one
5
⁄
16
-18 x
5
⁄
8
inch washer-head screw. Tighten either
the screw or the bolt to 10–15 lb ft (14–20 N·m).
(4) Place the pan gasket onto the oil pan.
Do
not use
any substance as a gasket retainer.
(5) Install the oil pan. Guide the pan and
gasket carefully into place. Guard against dirt or for-
eign material entering the pan. Retain the pan to the
housing with
four
5
⁄
16
-18 washer-head screws, in-
stalled
by hand
into the corners of the pan.
(6) Install the remaining seventeen washer-
head screws
by hand
, carefully threading each
through the gasket and into the transmission. Bottom
all of the screws before tightening any of them.
(7) Evenly tighten all twenty-one screws to
10–15 lb ft (14–20 N·m). Check gasket fit while the
screws are being tightened.
(8) Install the filler tube at the side of the
pan.
(9) Check Dimension
A
(Figure 3–5) to de-
termine what oil pan boss is present. If Dimension
A
is
0.570–0.580 inch (14.48–14.73 mm), then tighten the
tube fitting to 65–75 lb ft (88–102 N·m); if Dimension
A
is 0.670–0.680 inch (17.02–17.27 mm), then tighten
the tube fitting to 90–100 lb ft (122–136 N·m).
(10) Install the drain plug and washer. Tighten
the plug to 15–20 lb ft (20–27 N·m).
(11) Replace the external auxiliary filter ele-
ment (cooler-out line), if present. Refer to Paragraph
3–9
d
.
(12) Refill the transmission with fluid.
(13) Check the fluid level as outlined in Para-
graph 3–5.
CAUTION:
Do not use gasket-type sealing compounds, fi-
brous greases, or nonsoluble, vegetable-base
cooking compounds any place inside the trans-
mission or where they could be flushed into the
transmission hydraulic system.
Fluid Fill Rebuild Servicing
Shallow oil pan — 4.0 inch
(102 mm)
15 U.S. qts.
(14 liters)
9 U.S. qts.
(8.5 liters)
Deep oil pan — 5.3 inch
(135 mm)
22 U.S. qts.
(21 liters)
16 U.S. qts.
(15 liters)
To Next Page
Loading...
Need help?
General
