But I feel that changing 3 quarts or so at a time is better than none at all and also better than changing all of it at once because of the deposit clogging issues. If I had one of those 5hp22 trannies (I think) I wouldnt be afraid of changing the filter a few times till the fluid was cleaner. Have to drive at least 1000-1500 miles between changes as to not upset everything at once. What I read was lifetime meant 80-100k not 200k.

Im glad my trans (5hp18) takes the dextron III its cheaper but the trans is weaker so I will have to hold back on the Nitro Methanol at the track for now. Not to mention how small the ring and pinion setup is on these non-540 vehicles, no trans brake either.