Some Tx's need to be checked idling in neutral, not sure about yours.
Many rebuild shops, who should really know better, use their bulk universal one size fits all transmission fluid.
One size DOES NOT fit all, even with an additive they such places also brag about.
Dodge overdrive transmissions are extremely finicky about the correct fluid. When mine was just still in warranty, I was getting shuddering from 47 to 60MPH under light accelleration in overdrive/ lock up. It was torque converter clutch chatter. It was caused by the incorrect universal bulk fluid that Aamco used when they rebuilt it.
That was 2002. I had the transmission fluid exchanged with ATF+3 at a dodge dealer and there has not been a shudder since.
NOw ATF+4 is all that is available and backwards compatible and a much better ATF anyway.
So figure out if your TX needs to be checked with the engine running in neutral or not. Also sniff the fluid after wiping dipstick on a white napkin. You want to see pink and no sparklies. You want it to smell sweet and not burnt.
As far as if it is the correct ATF for your vehicle, well that is mroe difficult to acertain, but The cynic in me says that the rebuilders used what was best for their bottom line, not best for the transmission.
If I had not put 10K miles in a year on my freshly rebuilt transmission it would have started shuddering well out of warranty. As it was, Aamco was useless in getting the shuddering sorted out, and I feel nothing but murderous rage whenever I think of those shitheads in Tons River NJ who kept insisting that there was no shuddering.
Also never trust any Iffy lube joint to use the correct fluid, and if they try and sell you a flush, run away screaming.
A 'flush' does not require a pan drop and fliter change. A flush might itself clog the filter. While much of the fluid will remain in the torque converter or other parts with a simple pan drop, getting the old filter out and replaced should be considered paramount. One can then inspect the pan for debris or huge amounts of ferrous sludge on the pan magnet. If the pan is a sludge and glitter fest then there is NO point in replacing any of the fluid or snking any money into it other than a rebuild.
