Yeah,check out the cable first.The speedo driven gear on the A833 is a plastic gear, the retainer is eccentric shaped, make sure it's not positioned incorrectly and binding the gear.After installing the A833 in our 51 truck, the speedo was way slow. I couldn't find the proper gear for correction so I had an adapter made by an speedo shop who advertises online,The Guage Guys.50 bucks,fast service, accurate speedo.
