Lower Vehicle - Dodge ram truck 3500 1996 Service Manual

21 - 276 AUTOMATIC TRANSMISSION—46/47RE BR
S E R V I C E P R O C E D U R E S (Continued)
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Fig, 25 Pan and Magnet
(5) Install screws to hold pan to transmission (Fig.
23). Tighten bolts to 17 N-m (150 in. lbs.) torque.
(6) Lower vehicle and fill transmission with Mopar
ATF Plus, type 7176 fluid.
TRANSMISSION FILL PROCEDURE
To avoid overfilling transmission after a fluid
change or overhaul, perform the following procedure:
(1) Remove dipstick, and insert clean funnel in
transmission fill tube.
(2) Add following initial quantity of Mopar ATF
Plus to transmission:
(a) I f only fluid and filter were changed, add 3
pints (1-1/2 quarts) of ATF Plus to transmission.
(b) I f transmission was completely overhauled,
torque converter was replaced or drained, and
cooler was flushed, add 12 pints (6 quarts) of ATF
Plus to transmission.
(3) Apply parking brakes.
(4) Start and run engine at normal curb idle
speed.
(5) Apply service brakes, shift transmission
through all gear ranges then back to NEUTRAL, set
parking brake, and leave engine running at curb idle
speed.
(6) Remove funnel, insert dipstick and check fluid
level. I f level is low, acid fluid to b r i n g level to
M I N m a r k on dipstick.
(7) Drive vehicle until transmission fluid is at nor­
mal operating temperature.
(8) With the engine running at curb idle speed, the
gear selector in NEUTRAL, and the parking brake
applied, check the transmission fluid level.
CAUTION: Do not overfill transmission, fluid foam­
ing and shifting problems can result.
(9) Add fluid to bring level up to MAX arrow
mark.
When fluid level is correct, shut engine off, release
park brake, remove funnel, and install dipstick in fill
tube.
CONVERTER DRAINBACK CHECK VALVE SERVICE
The converter drainback check valve is located in
the cooler outlet (pressure) line near the radiator
lower tank. The valve prevents fluid drainback when
the vehicle is parked for lengthy periods. The valve
check ball is spring loaded and has an opening pres­
sure of approximately 2 psi.
The valve is serviced as an assembly; it is not
repairable. Do not clean the valve i f restricted, or
contaminated by sludge, or debris. I f the valve fails,
or i f a transmission malfunction occurs that gener­
ates sludge and/or clutch particles and metal shav­
ings, the valve must be replaced.
The valve must be removed whenever the cooler
and lines are reverse flushed. The valve can be flow
tested when necessary. The procedure is exactly the
same as for flow testing a cooler.
If the valve is restricted, installed backwards, or in
the wrong line, it will cause an overheating condition
and possible transmission failure.
CAUTION: The drainback valve is a one-way flow
device. It must be properly oriented in terms of flow
direction for the cooler to function properly. The
valve must be installed in the pressure line. Other­
wise flow will be blocked and would cause an over­
heating condition and eventual transmission failure.
ALUMINUM THREAD REPAIR
Damaged or worn threads i n t h e aluminum tran-
saxle case and valve body can be repaired by the use
of Heli-Coils, or equivalent. This repair consists of
drilling out the worn-out damaged threads. Then tap
the hole with a special Heli-Coil tap, or equivalent,
and installing a Heli-Coil insert, or equivalent, into
the hole. This brings the hole back to its original
thread size.
Heli-Coil, or equivalent, tools and inserts are
readily available from most automotive parts suppli­
ers.
FLUSHING COOLERS AND TUBES
When a transmission failure has contaminated the
fluid, the oil cooler(s) must be flushed. The cooler
bypass valve in the transmission must be replaced
also. The torque converter must also be replaced with
an exchange unit. This will insure that metal parti­
cles or sludged oil are not later transferred back into
the reconditioned (or replaced) transmission.
There are two different procedures for flushing
coolers and lines. The recommended procedure is to
use Tool 6906 Cooler Flusher. The other procedure is
to use a hand suction gun and mineral spirits.