Dodge RAM TRUCK 1500 1995 Service Manual page 1398

B H
42RH/46RH/47RH TRANSMISSION DIAGNOSIS AND TESTING 21 -115
13/32' DRILL 2 HOLES
3-3/4"
RADIUS
MATERIAL: 3/16 INCH STEEL STOCK
K N / b J
Fig. 14 Pump Went Plug (42RH)
AIR PRESSURE LEAK TEST PROCEDURE
(1) Install vent plug, converter hub seal cup and
cup retaining strap (Fig. 15).
CAUTION: B e sure the surfaces of the hub seal cup
are smooth and free of nicks, scratches, or burrs.
Surface irregularities on the cup will damage the
pump seal if not removed. Sand and/polish the cup
with 400 grit sandpaper or crocus cloth to smooth
the surface if necessary.
(2) Close off remaining transmission openings with
rubber plugs, or stoppers or similar devices. Do not
close off rear cooler line fitting. Hand operated
air pump will be attached to this fitting.
(3) Attach Air Pump 7700 to rear cooler line fit­
ting. Connect a length of copper tube to fitting. Then
attach pump hose to tube with hose clamp (Fig. 16).
(4) Apply a thick soapy water solution to suspected
leak areas.
CAUTION: The recommended test pressure is S psi.
The maximum allowable test pressure is 10 psi. Do
not exceed specified pressure.
(5) Pressurize transmission to 8 psi with air pump.
(6) Observe suspected leak areas. Air bubbles ap­
pearing in soapy water solution indicate leak points.
(7) Remove test tools and plugs after test comple­
tion and make necessary repairs as described in Leak
Correction procedure.
CONVERTER HOUSING AREA LEAK
CORRECTION
(1) Remove converter.
Fig. 15 Went Plug And Hub Seal Cup Installation
FRONT
FITTING
(INSTALL
PLUG)
HOSE AND TUBING
CONNECTED TO
REAR FITTING J9521-62
Fig. 16 Typical Method Of Pressurizing
Transmission
(2) Tighten front band adjusting screw until band
is tight around front clutch retainer. This prevents
front/rear clutches from coming out when oil pump is
removed.
(3) Remove oil pump and remove pump seal. In­
spect pump housing drainback and vent holes for ob­
structions. Clear holes with solvent and wire.
(4) Inspect pump bushing and converter hub. If
bushing is scored, replace it. If converter hub is
scored, either polish it with crocus cloth or replace
converter if scoring is severe.