1992 acting up at at 20 mph (acts like it's downshifting) ?

[Jacob Segars]

My 1992 ford ranger with 2.3 L and 4 speed automatic tranny is acting like it is hard shifting at approximately 20 mph but is fine deaccelerating and any speed before or after 20 mph. I have drained the transmission, replaced the modulator, fluid & filter and hasn't made any difference in this regard. This is my daily driver as a high schooler, and do most of the work on the truck as I can with my dad.

Note: Does this in both drive & overdribe.

Future mechanical projects include:
1.New muffler (current has no catalytic-hope to improve mpg & emissions, and back pressure)
2.Various others task include brakes, air filter, and detail job

Thanks in advance.

Jacob Segars

 

[91stranger]

What does it do when it is hard shifting? like shuttering or grinding? a pause between shifting? gears jamming in place? just trying to get more of an idea other than "shifting hard."

 

[Andy D]

What was the drained ATF like? If it was black and stinky...

 

[Jacob Segars]

Sorry to just now be responding.

I guess it acts like it pauses.

Fluid was brown, not really trashy. Fluid has gone back brown, have debated on flushing it but am afraid to remove stuff that might be causing it to work lol.