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AUTOMATIC TRANSMISSION
21 - 5i
WELD OR
BREAK EDGE
RH253
Fig. 8 Pump Area Inspection
Points
OUTSIDE
DIAMETER
WELD
TORQUE CONVERTER
HUB WELD
'LUG
STARTER RING GEAR
RH254
Fig. 9 Converter Leak Points (Nonlockup Shown)
Some transmission openings such as t h e f i l l tube
a n d f r o n t cooler line f i t t i n g can be closed o f f w i t h a
r u b b e r p l u g or s i m i l a r device. Plugs can secured w i t h
w i r e or duct tape.
The
transmission rear
o u t p u t shaft
opening is
closed off simply by leaving t h e transfer case bolted
i n place. However, i f the transfer case has been re-
moved, a shipping p l u g can used t o close off t h i s
opening.
The torque converter h u b opening i n t h e p u m p a n d
t h e p u m p vent require special tools to close t h e m off.
The converter h u b seal cap is made f r o m t h i n w a l l
tube a n d a 1/8 inch t h i c k disc (Figs. 10, 11). A r e -
t a i n i n g strap is needed to secure t h e seal cup for
testing. The strap can be made from 1-1/4 i n c h wide
stock (Fig. 12). The strap a t t a c h i n g hole positions a r e
approximate only. Measure hole position o n t h e con-
v e r t e r housing before d r i l l i n g .
The pump vent tool is made from 1/4 i n c h rod a n d
3/16 plate (Figs. 13, 14).
The fabricated tools can a l l be made f r o m m i l d
steel or a l u m i n u m stock.
MATERIAL: 1-7/8 INCH O.D.
THIN WALLED STEEL TUBING
AND 1/8 INCH STEEL DISC
OUTSIDE OF OPEN
END FOR THIS
DISTANCE ON TUBE
R N 7 7 9
WELD
OR BRAZE
Fig. 10 Converter Hub Seal
Cup—A-727
BREAK EDGE
1/16" MIN.
MATERIAL: 1-1/2 INCH O.D. THIN
WALLED STEEL TUBING AND
1/8 INCH STEEL DISC
POLISH
OUTSIDE
OF OPEN
"END FOR
THIS DISTANCE
ON TUBE
1.498
RN780
Fig. 11 Converter Hub Seal
Cup—A-998/999
15/32 INCH DRILL 4 HOLES
MATERIAL: 1/4 INCH STEEL STOCK
1-1/4 INCH WIDE
RN781
Fig. 12 Seal Cup Retaining Strap
AIR PRESSURE
LEAK
TEST
PROCEDURE
(1) I n s t a l l t h e vent p l u g , converter h u b seal cup
and cup r e t a i n i n g strap (Fig. 15).
(2) Close off t h e r e m a i n i n g transmission openings
w i t h rubber plugs, or stoppers. D o n o t c l o s e o f f t h e
r e a r c o o l e r l i n e f i t t i n g . T h e a i r p u m p w i l l b e a t -
t a c h e d t o t h i s
fitting.
(3) A t t a c h a i r p u m p C-4080 t o t h e rear cooler line
fitting.
Connect a l e n g t h of copper tube to the
fitting.
T h e n attach t h e a i r p u m p hose to t h e tube w i t h a
hose clamp (Fig. 16).
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