Am new to this forum and have noticed a lot of Auto Trans problems/questions and disinformation.Being a factory trained Honda tech for the past 22 years ive leaned a few things. Auto Trans slippage problems in 1990 and new cars is ALMOST always due to the Torque Converter clutch plate material coming off and plugging the pump screen. When this happens, the pump cannot supply enough pressure to the clutch packs and that clutch slips causeing lack of power to the axles. No fluid or additive in the world will fix the problem, The trans must be disassembled, cleaned,torque converter replaced and clutch packs rebuilt. regular fluid changes are a must, I suggest every 15K miles.Speaking of fluids, Honda recommends useing their fluid for a reason,its because their fluid contains a high amount of friction modifier,, meaning,, its slippery as compared to Dextron, this allows smooth shift. Dextron useage will provide a firmer shift.Will Dextron cause more wear of the clutch plates? I have NO idea.. I said earier that ALMOST all problems are caused by above, you can also have soleniod,control unit/PCM and linkage problems, but they are rare..