Thanks fefarms you answered my question well. the only sensor i could find on the outside of tranny controls the overdrive circuit. you and others have mentioned additives that will get rid of the shudder but you state that it will not get rid of it permanently. how long would this kinda fix usualy last and will just doing a pan drop and filter change swap out enuf fluid to do the job? the truck is used as daily driver and spends most of time on highway as i drive 35 miles one way to work everyday.
thanks again........Donald