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Not really. The valve body solenoid are different on both.
Solenoids, and sensors inside the trans are the same from 96-99. The only difference from 96-97 to 98-99 is in 98they switched over to the plastic encased filter. Ive rebuilt the valve bodies side by side and they are identical. I've swapped the transmissions throughout those years and no issues. This applies to 4wd only because the 96-97 2wd transmissions have the speedometer output in the tailhousing.