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Transmission |
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.
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3 AT
The transmission above is a rear wheel drive 3 speed automatic. Common
symptoms are: erratic shifting, slipping or losing trans fluid without a source
of a leak.
Pull the vacuum line off
the modulator, check your vacuum source. If fluid comes out of the vacuum line,
your modulator is no good.
Make sure your band get adjusted when you service your transmission.
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4EAT
The transmission above is
a front and or all wheel drive 4 speed automatic, that is all computer
controlled. It uses a microcomputer to judge operating conditions while
monitoring the throttle position sensor and vehicle speed sensor and many
others.
Common symptoms are trans shifting erratic, slipping or not shifting at all.
external sensors on the vehicle like the winter mode switch, throttle position
sensor and vehicle speed sensor, quite often go bad causing these symptoms.
Always run a scanner first to
see if a sensor is causing your problem.
I recommend that you change the transmission fluid on this style transmission
about every 12,000 to 15,000 miles.
This vehicle has a
transmission fluid temperature sensor. This sensor will not allow the
transmission to shift into 4th gear or the torque converter to lock/up in
extremely cold weather. Keep this in mind if the above is your problem.