New from Ford Racing Products, the Speed-Dial Speedometer Adjustment Tool is designed to correct the speedometer read out after making changes such as rear-end gear and tire size. The unit is adjustable from a 200% vehicle speed sensor (VSS) increase to as low as 99% of the original signal. The unit is simple to use and easy to install. The Speed-Dial Adjustment Tool is designed to withstand vibration and harsh environmental conditions.

Official Release:

Part Name: Speed-Dial Speedometer Adjustment Tool

Part Number: M-4209ADPT-A

Part Description: Ford Racing’s Speed-Dial Speedometer Adjustment Tool is for 1994-2010 Mustang owners who want to change their rear-end gear or tire/wheel size and*not spend hundreds of dollars for an aftermarket tuner device to correct the speedometer readings.

The Speed-Dial is a compact electronic speed sensor that provides a compatible signal required for proper speedometer reading. The unit features three adjustable rotary dials for adjustability and is easily wired-in between the vehicle speed sensor (VSS) and PCM/Instrument cluster. The Speed-Dial can increase the VSS signal up to 200% of the original signal, or decrease the signal by as much as 99%. Once the proper ratio has been determined using a simple formula, the owner simply dials it into Speed-Dial and the speedometer reads correctly.

• Corrects speedometer readings after larger wheel/tire installation or gear ratio changes.
• Fits 1994-2004 Mustang with a manual transmission.
• Fits 1994-2010 Mustang with an automatic transmission.
• Tool scales a frequency based vehicle speed signal up/down to maintain accurate. vehicle speed indication to the instrument cluster and PCM.**
• Engineered to withstand vibration and environmental conditions of under-hood installation.
• Easy 4 wire installation with instructions.
• No reprogramming of PCM necessary.