tregath Posted February 25, 2009 Share Posted February 25, 2009 Hi, I have a mk1 2 door escort i am rebuilding, it a 1300 super, and i have brought a mk2 1600 ghia to use as a donor car which i want to use the motor box and diff out of. How do i go about adjusting the speedo to suit the new ratios? Or am i better to use the existing box/diff and just swap the engine over? Quote Link to comment Share on other sites More sharing options...
Unclejake Posted February 25, 2009 Share Posted February 25, 2009 Most small fords have a swappable plastic speedo drive in the gearbox. It is easy to change and the colour of the drive (blue, green, white etc.) is matched to the diff ratio. In other words if you use a matched gearbox and diff I think you will be OK Quote Link to comment Share on other sites More sharing options...
escorted Posted February 25, 2009 Share Posted February 25, 2009 Either that or get it Re-calibrated Quote Link to comment Share on other sites More sharing options...
sholdowa Posted February 25, 2009 Share Posted February 25, 2009 Most small fords have a swappable plastic speedo drive in the gearbox. It is easy to change and the colour of the drive (blue, green, white etc.) is matched to the diff ratio.In other words if you use a matched gearbox and diff I think you will be OK Here's a partial table of colour codes - unfortunately for crossply tyres but it's the only one I've got, but it should get you started... Drive Gear Number of Teeth on Driven Gear Colour of Driven gear Axle Ratio / Tyre size 6 teeth 22 Natural (White) 4.125 :1 with 5.20 x 13 tyre 6 teeth 23 Black 4.44:1 with 5.20 x 13 tyre 6 teeth 22 Natural (White) 4.125 :1 with 5.60 x 13 tyre 6 teeth 23 Black 4.44 :1 with 6.00 x 13 tyre 7 teeth 23 Black 3.9 :1 with 5.60 x 13 tyre 7 teeth 22 Blue 4.125 : 1 with 5.60 tyre 7 teeth 24 Green 3.9 :1 with 6.00 tyre Don't lose that circlip now.... Quote Link to comment Share on other sites More sharing options...
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