Thanks for the info John.
About two days before I was about to ring Scot's I had a stroke of luck which sheds a bit of light on speedo's generally.
Popped in to Colin Gould at Faringdon and it turned out he has a supply of *NEW* lhd kph speedo's.
First discovery was that they have mph on them as well! In an inner ring in the same way as we have kph on our mph speedo's.
Then we set about trying to figure out what made them lhd. Turns out it is the pressed metal cover on the back only! This carries a peg which locates the angle drive to point in a particular direction - obviosly opposite when you change drive sides!
Solution - swap the tin cover for the one off your old speedo! 3 minutes and 4 screws (assuming you don't drop them)
This throws up a conclusion about speedo's. There are two varieties of speedo only - kph and mph - and two varieties of tin backing cover - lhd and rhd. The four varieties of speedo listed are therefore permutations of these items!
All those needing a new speedo head take note and don't be frightened off by a lhd part number.
**QUESTION** anybody know whether a kph speedo with mph graduations on the inner ring as described is legal for the British MOT?
Another tip. If you can only get a V8 speedo and you have a 4 cyl car then get the speedo recalibrated at somewhere like
www.jdo1.com . Same applies to anyone changing rear axle ratio or fitting tyres with a non standard rolling radius.
Ps I've found a superb automatic calculator for those challenged by tyre choice or diff ratio: go to the Dutch SD1 site on
www.roversd1.nl and click on "bodyshell" then on "driveline calc".
Cheers
Chris York
