Speedo Correction

Speedo Correction

Speedometer correction is required for many reasons. Larger Tyres would be the most common 4WD upgrade and differential change would be another.

Example:

• Tyre size increase from 30\" to 33\" will give a 10% error reading on the speedo
• Tyre size increase from 30\" to 35\" will give a 16.5% error reading on the speedo

Digital Speedo Correction MFK2800 - Tyre Match Box

Digital Speed Correction boxes are available for vehicles fitted with electronic speedometers driven by Hall Effect and Inductive Vehicle Speed Sensors (VSS)

• Hall Effect VSS units can be identified as having 3 wires.
• Inductive VSS units can be identified as having 2 wires.

Our electronic ratio box is unique in that it has two user selectable ratios available, switched via a 2 positioin toggle switch. One postion can be programmed for highway tyres, the second position can be programmed for off road tyres. Both ratio options are 100% user programmable and can be programmed to any speed. A GPS is the most suitable device for calibration. This speedo corrector can be calibrated to an accuracy of less than 2%.

NOTE: Most speedometers are not perfectly accurate through there entire range - this unit will not fix this problem.

NOTE: This unit is not compatiable with the following vehicle models

• Toyota LandCruiser 70 Series - with ABS
• Toyota LandCruiser 200 Series
• Toyota Prado - automatic with ABS
• Dodge Ram
• Nissan Patrol - Y62

Cable Driven Speedo Correction - Ratio Box

Marks 4WD Adaptors stock mechanical speedo correction boxes to suit two of the most common ratio changes, +10% and +16.5%
Custom mechanical speedo corrections boxes are available upon request.