I am guessing that your 1992 Dynasty has the 4 speed transmission. If so, t
here were many issues with this transmission.
It was a hot topic on this newsgroup for many years. If you wish, you can g
et more info by going to allpar.com, and select "transmissions." You will f
ind all the latest info on this transmission.
I had a 1993 Plymouth Voyager with this transmission. I was careful about c
hanging the fluid on a regular basis, using the correct fluid, but still ha
d problems at 100,000 miles. I had it rebuilt by a transmission shop, and i
t ran fine for four more years, when the engine developed a problem.