Question about Dodge B Series Cargo

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I have a 93 dodge b350 with a 5.9lv8 and an automatic trans. when im driving down the road and come to a stop, when it gets to about ten miles an hour it starts shaking the whole van and almost kills the engine and then it finally downshifts. but when i shift it down to 2nd or first or even neutral, it doesnt do it. what could be the problem. PS- i just bought this van and it appears it has a fairly new transmission because it is spotless and the engine is oily

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  • justin richey Jan 03, 2011

    it also has a trouble code 45 and 37

  • justin richey Jan 03, 2011

    need better expert

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The PCM has detected a problem with the overdrive solenoid circuit (code 45) and due this solenoid not activating correctly, the PCM has also stored a code 37... high trans temp. The solenoid that will need to be replaced is inside the transmission and will require the valve body assembly to be removed and well as other components. Performing this task is a big job when the trans is still installed in the vehicle. There are many tiny check balls in key locations within the valve body assembly that will fall out, and is easier to remove and replace when the entire trans is removed and turned over on a stand or bench. You can check the electrical connections for corroded,loose or broken tabs first to see if this is a likely cause,and before pulling the trans.
If you are considering doing this job yourself, I strongly recommend a Factory service manual to guide you thru the procedures. It is not an easy job as I said before, and would be best to remove the trans to repair.

Posted on Jan 04, 2011

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Maybe not repaired correctly, inside there a combination of balance shafts and kickback springs that are supposed to work in unisen, or there is an (un-balanced drive shaft) in it.
try jacking the drive wheels off the ground, and have someone repeat the procedure while you observe it from underneath the vehicle (be safe while doing this) as it down shifts there should be no sise to side movement of the shaft. look for worn carrier bearing also. if all are good, then it might be the trans internals.

Posted on Jan 03, 2011

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