Steeda Mustang Speedometer Recalibration Gear-Automatic-7 Tooth 4.10 Ratio 23 Speedo-83-98 10205S 1969-1974 Ford E-100 Econoline

1969-1974 Ford E-100 Econoline

Five-Rib Aluminum Insulator

A custom CAD designed roto-molded housing made from heat resistant material eliminates the use of multiple components and ensures the coolest air intake charge available

Replacement Part: Intercom Music Jack

Provides frame rail clearance when lowering your ride height

Steeda Mustang Speedometer Recalibration Gear-Automatic-7 Tooth 4.10 Ratio 23 Speedo-83-98 10205S 1969-1974 Ford E-100 EconolineMustang Speedometer Recalibration Gear Automatic 7 Tooth 4. 10 Ratio 23 Speedo 83 89 Fits 1983 1989 Ford Mustang with Automatic Transmissions. Once you change the gears in your differential, you need a new speedometer gear to recalibrate your speedometer. They're inexpensive, and only take a few minutes to change. Note transmission type, model and resulting drive gear. Cross reference with your rear end gear ratio to find the correct "recalibration"