speedo ...

[EdT]

What exactly is it that fails, when the mileometer/oddometer stop ticking over? It happened on the last car, and has just happened to this one. There goes several hours this weekend - getting that little bugger out again!

[dnb]

The mechanism seems to jam up, or else the motor isn't powerful enough to turn the mechanism. Mine seems to jam on the "big" changes - the 10k and 100k mile rollovers.

I've used some silicone grease on the mechanism this time, but I've not done enough miles to know if it will fail again yet.

[EdT]

How much did you open it up to apply? Last time, I removed the dash & just took the unit out to remove the perspex front & clicked the rollover by hand. Sold that car before the next 10K click so dont know whether was a one off or not! Recall not having much of a giggle removing the speedo, so like to do anything I can to help it not happen again with this one.

[dnb]

I think the best thing to say is "plenty"!

I'm thinking up ways of making a quick release speedo for next time

[CLN1]

Mine stuck on 20,000 miles coming back from Lemans last year but started up again after a couple of miles and a little tapping on the perspex cover as we were driving along. It seems to have been ok since. Not a scientific fix but what the hell !

Colin.

[EdT]

last time read I read loads of posts with 'easy' fixes, such as tapping the perspex, reversing hard for 100 yards..
Never worked for me sadly!

[Chimjunkie]

The problem seems to be so simple it is unbelievable! The stepper motor attaches to the counter mechanism via a spring coupler. This spring coupler is not loctited and starts to slip under maximum load. I.e 9999 to 0000 etc. The fix is to crimp the coupler or apply some loctite. Another inexcusable fault. Not a job for the DIY novice though!!

[EdT]

Chimjunkie said:

Not a job for the DIY novice though!!

damn

[dnb]

If you've ever taken the speedo apart, it's not difficult to do

[BIG DUNC]

Its not taking it apart that worries me, but putting it back together again!!

[Pasco]

dnb said:

If you've ever taken the speedo apart, it's not difficult to do

Forget taking the bloody thing apart Dave !

How do you get it out of the dash

[Pupp]

Mine's done it times... always got it going again by just 'flicking' the trip reset button whilst trundling along. Watch the road though

[EdT]

fixed (itself)

[Pasco]

EdT said:

fixed (itself)

They do that Sir

[lockhart flawse]

My speedo only works intermittently. Driving along with nothing and all of a sudden the needle swings up and starts working as normal.

Is it likely to be something that can be fixed at its next service?

L.F.

[5.0ltr]

Could also be the speedo contact on the rear half shaft needing adjustment.

[Ballistic Banana]

[Ballistic Banana]

lockhart flawse said:

My speedo only works intermittently. Driving along with nothing and all of a sudden the needle swings up and starts working as normal.

Is it likely to be something that can be fixed at its next service?

L.F.

That sounds more like the speed sensor problem to me, The garage should be able to check the gap and condition of it. There are ways of checking it if you have an oscilloscope or more crudely with a multimeter.

BB