Thanks for that Lee ........ and you are right, I don't get much of a chance to let rip, so to speak, but I don't think high speeds have much to do with speedo failures.
That fault you, and others told me about some time ago whereby the speedo stops working and by flicking a high current accessory switch brings the speedo back working, and I had never had it happen to me, well it eventually did happen to me in Macon a couple of years back.
To cut a long story short, when I got home, I set about looking for this problem with the instrument unit on the bench. You may remember I did post a lengthy article in the members area giving info on overhauling the speedo board. So in the knowledge that I had already done all of that, clearly, there was something else.
Well I did find something and once I had attended to that, I have had no trouble since ....... and two years down the line with two Macon's and two Goodwood's under its belt, I have had no more trouble.
I did not post the fix at the time, as I wanted to check that it was, in fact a fix, so I am now going to post it in the Members Area under "Speedo fix 2", although this should be attempted before going the whole hog of a Speedo board Overhaul.
I did write it up as I went, so for the benefit of Members wishing to give it a try ....... over to the Members Area.
But remember ...... the first port of call in speedo failures .... mainly Turbo's .... is the three pin speed sensor mounted on the engine side of the offside wheel arch, which must be cleaned and checked.
1990 GTA Atmo, 2003 Jaguar X type 2.5SE Auto, 2002 Daihatsu Sirion 1.3SE