AFL valve oscillation due to wear of the valve body bores over time
it will continue to happen until the trans is rebuilt and the valvebody is machined for the Sonnax repair sleeves/valves.
learn to drive it so that you are the one stopping the occilation, then get back into the throttle, enjoy pissing people off from driving like a little old lady.
you could just get a Tripple edge performance reman VB and install it to fix that issue but then again the trans is probably close to needing a full overhaul too....why pay all that labor to have to redo it all when the trans clutches are gone.
save for a trans, change driving habits to limp along