In one of the threads about towing with an auto tranny, someone suggested using the "OD Off" button to keep the tranny from hunting. It seems to me this would be good up to about 30 or 40 mph, but above that you'd be turning some really high RPM's in 3rd gear. My question is, has anyone ever tried modding the "OD Off" circuit so that it only drops to 4th gear, like it does when going up a hill? My daily drive is on 45mph 2-lane with very rolling hills, and I'd love to be able to disengage the lockup and just keep it in 4th gear. Thanks for any info!