Newbie here. Just bought my 94 3500 12v 4wd 47rh truck. Previoys owner thought trannt was going out so sold it. After exhausting search of tps issues, finally found problem. Shaft on throttle linkage pivot (where cables connect) sloppy and not allowing tps to create enough voltage. No where could i find anyone saying they had this problem. I wonder if all the drilli g and slotting of tps has been because of this. Fixed shaft, good voltage , rolling tall.