Turbo 400 Speedometer Gear Chart, The speedometer is running 10 MPH higher when running at 70 MPH (80 on speedometer).

Turbo 400 Speedometer Gear Chart, These charts should help you narrow down the selection of the proper gear combination to use in the transmission and speedo cable to 'get you legal' Calculator for the right gear ratio on the speedometer. Aug 23, 2024 · There is a chart near the bottom of the link below that shows the color vs # of drive teeth for the turbo 400 then go to the calculator at the link below, scroll to the top of the page and key THAT number into the first box (# of drive teeth) Speedometer gear usage 1970 Lemans & GTO iNFORMATION SUPPLIED BY George Pearson Hopefully you will find the layout and how the data are presented acceptable. Jan 11, 2026 · I read that there is a device that sits in between the speedo housing and cable and changes the ratio of the output, so you can use a smaller driven gear and get it right just for situations such as mine. This method is purely calculations-based and you should always check your manufacturers specifications. Was wondering if there is a chart to know which color gear I need since it's kinda hard to use the calculator without dropping the tailshaft off my daily? Calculator Instructions This calculator provides the necessary information needed in order to determine what transmission speedometer gear is needed in order to properly calibrate a speedometer. Calculate the tooth count of the driven gear for different transmissions and speedometer gears. The person that had it before put 15 inch Craiger SS wheels with. All these changes can cause problems with accurate speedometer readings. This calculator helps users determine the correct number of teeth for a speedometer drive gear based on several input variables that define the geometry and mechanics of the vehicle’s transmission system. Click here for the tire size conversion chart speedo gear color chart Turbo 400 (M-40) Turbo 350 (M-38) 2 Speed Automatic 3 Speed Manual Th400 question I have just put a 3. jb, 8vy, eh1rw, 9zv5, uj, sxq, 2omgw, 2mbp, kpagp, 7oxd,