Dave_harman1990 Posted December 11, 2014 Share Posted December 11, 2014 Hi people, my supras speedo seems to read 2/3rds of the actual speed your doing, I.e 20 when doing 30, 40 when doing 60 etc. It is an na-tt import and I know theres some sort of speedo healer behind the dash and the cars had no expense spared by previous owners so im assuming its a good one. How do you adjust these or is it indicating a faulty part somewhere? The speedo goes upto 180mph just incase maybe its got the wrong face plate fitted. Many thanks Dave Quote Link to comment Share on other sites More sharing options...
Justin Bieber Posted December 11, 2014 Share Posted December 11, 2014 What gearbox and diff have you got? I was running a 5 speed gearbox with a tt6 diff and my speedo was miles out, quite similar to yours actually, 90mph read about 60ish, and 150mph was between 100 and 110mph! Quote Link to comment Share on other sites More sharing options...
Littler Posted December 11, 2014 Share Posted December 11, 2014 That's a UK speedo, is there a converter connected? This won't be needed to be connected to the speedo if it is. I had similar issues when I first installed a UK speedo Quote Link to comment Share on other sites More sharing options...
Dave_harman1990 Posted December 11, 2014 Author Share Posted December 11, 2014 Its got 6 speed gearbox and some lsd. No idea what diff though. But I believe it has a speedo converter as I said, so this may not actually be needed? Quote Link to comment Share on other sites More sharing options...
ScottC Posted December 11, 2014 Share Posted December 11, 2014 You dont need the speed convertor if your running a UK speedo Quote Link to comment Share on other sites More sharing options...
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