the problem is the speedo drive in the trans, you need to find a different speedo gear for it or use something like a GPS to figure out the accuracy and live with it .... if it's a "steady" 30 fast at all speeds you might move the needle down
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics
