Ford escort mk2 speedo incorrect.

Asked by May 22, 2015 at 01:34 AM about the 1975 Ford Escort

Question type: Maintenance & Repair

Ive recently purchased a 1975 ford escort
mk2. Everything is going well, weve just
had to replace the pressure plate as it was
a bit worn. But the speedo is incorrect. The
speedo cable runs to the gearbox... which
seems to be the problem As it has a not so
original type9 gearbox. So basically how do
I fix this? Do I need another speedo guage
or is it the speedo cable? How do I get the
speedo to indicate at least relatively true?
And help is apreciated.
thanks.

3 Answers

113,505

It is the speedo drive gear in the tranny, you can change it to match to actual speed, you need to know how much it is off to do this, if you speedo is too slow then a gear with less teeth will speed it up, so the reverse if it is too fast.

1 people found this helpful.
Best Answer Mark helpful

Do you know how I can calculate the amount of teeth on the drive gear I need? Or do you know what drive gear I need? Its the original 1600 kent motor with a type 9 box.

113,505

Find out how far you are off, find a nice stretch of road that can hold 60 mph and has mileage posts, at 60 it should take 1 minute to go post to post, then you will know if your fast or slow. Then do the tooth count and replace the gear with the corrected amount of teeth, 1 tooth is approxmently 5.4 mph unless your tranny has the larger drive then it is 1 tooth for 4 mph. I also remembered that some speedo shops can build you an adapter that can do the same thing if you can't find the correct gear for your trans. But they aren't cheap but cheaper than a speeding ticket.

1 people found this helpful.

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