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

46RH / 46RE / 42RE / 45RFE 
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.

Back To Home Page         Back To Top of Page

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.

Back To Home Page         Back To Top of Page