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Dodge 45 RFE transmission shifting hard only from 2-3 with no DTC's

\015 I have taken it to the dealer and it had NO codes I have changed the oil and filter the old oil was perfect not burnt at all I have changed the transmission rubber mount the U joints are fine no play. It is like it hesitates for a split second then kicks in and clunks. It drives perfectly fine in all other aspects it is just when accelerating and it shifts from 2-3. I am thinking the selonoid valve assembly is lraking or cracked or the selonoid valve is physically sticking or partially plugged or something . that is electrically fine but mechanically faulty or obstructed. ??????????????\015 Posted / edited by AnonymousUser on : 10-08-2020

Answers :

Almost everything in a automatic transmission used to operated by the fluid flow. Nowadays transmissions have electrical parts too. I'm inclined to agree with your solenoid valve diagnosis. Did you notice any metallic debris in the bottom of the pan when you changed fluid?
If there is debris (and there almost always is) some may be in the bottom of the pan and some may be in the valve assembly. Hard acceleration means more fluid pressure and more fluid flow. Which may help the valve to operate. Some valves only operate a pilot circuit and ball check valve that further controls the major fluid flow.
Do you see any fluid around the modulator? And is the modulator port & orifice clear. Next time you have the pan off, see if you can pull the modulator and look at the mounting port and the orifice inside the modulator itself. If there is a dark colored square or rectangle in the pan. Wipe it off with a finger and check for grit or metal.
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