USATransdoctor.com
These
recommendations do not
cover all possibilities.
They are some things to
check before you have
your transmission rebuilt. Always
check transmission fluid level first. Always run
a scanner on any computer controlled transmission. On
modulated transmissions make sure they have enough vacuum.
JEEP
FIND THE MAKE
OF YOUR VEHICLE
CLICK ON THE YEAR OF YOUR
VEHICLE
Commander | 2006-2008 4x4 4.7L 5.7L 45RFE |
Cherokee | 1987-98 2.5/ 4.0 A340F | |||
Comanche | 1987-93 4.0L A340F | |||
Grand Cherokee | 1991-93 4.0LA340F | 1991-98 5.2/5.9L 46RH/RE | 1994-98 4.0L 42RE | 1999 4x4 4.7L 45RFE |
Grand Cherokee | 2002 4x4 4.7L 45RFE | 2005-2008 4x4 4.7 5.7L 45RFE |
Liberty | 2002 4x4 3.7L 45RFE | 2005-2007 4x4 2.8L Diesel 45RFE | 2003-08 2.4 3.8 4.0L 42RLE o/d |
Wagoneer | 1987-93 4.0L A340F |
Wrangler |
1995-2002 2.5,
4.0L 3 Spd 904 and 999 |
2003-08 2.4 3.8 4.0L 42RLE o/d |
Wrangler unlimited | 2008 4x4 2.8L 45RFE |
46RH / 46RE / 42RE /
The transmissions above are rear wheel drive 4 speed automatic transmissions, that are
computer and throttle pressure controlled. Common symptoms are transmission
shifting erratic, slipping or not shifting at all.
Always make sure your
throttle pressure cable is hooked up and adjusted properly, and
run a scanner to see if a sensor is causing your problem.
External sensors on the
46RH style, like the throttle position sensor, vehicle speed sensor or output
speed sensor quite often go bad, causing these symptoms.
On the 42RE / 46RE / 45REF styles, I have seen a lot of governor pressure
solenoids and governor
transducer sensors that attach to the valve body go bad. It's very difficult
to tell if their is a problem with these two items when using a scanner,
So
be care full.
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A340F
(30-40LE)
The transmission above
is a rear wheel drive 4 speed automatic that is
computer and throttle pressure controlled.
Always make sure
your throttle pressure cable is hooked up and adjusted properly, and run a scanner
to see if a sensor is causing your
problem.
External sensors on the vehicle like the throttle
position sensor or vehicle speed sensors quite often go bad, causing these
symptoms.
This is a very good transmission from the factory.
If you install
a trans cooler or keep your transmission fluid changed regularly, this
transmission should get you some miles.
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The
transmissions above are 4 and 5 speed rear wheel drive automatics, that are all computer controlled. If
your transmission starts shifting erratic or stays in second gear only, then
make sure you or a shop run a scanner on the vehicle. You want to see if
you have a sensor that has gone bad causing your problems.
Also make sure
you check the clutch volume index (c.v.i.). This helps determine the
condition of the transmission. Chevy's and Ford's do not have this neat
little feature.
Vehicle's with 45RFE transmissions have chronic electrical problems so be
careful.
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904
/ 999
The transmissions above are rear wheel drive 3 speed automatic transmissions,
that are throttle pressure controlled. Common symptoms are transmission
shifting erratic, slipping or not shifting at all.
Always make sure your throttle pressure cable is hooked up and adjusted
properly.
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