the speedometer gear is in the transmission, what transmission do you have? If a 3sp. you could just change the gear yourself, it's on the side where the speedometer cable connects. you just need the gear for the 3:42 rear.It's easy, 7/16 bolt holds it in, take bolt off pull speedo gear out change and reassemble. The only problem may be finding a speedo gear for your transmission, may try napa or a chevy dealer near you, poosibly an old transmission shop may have one. good luck, nice looking truck.
