I have a similiar issue with Myrtles speedo Dave, but not with the speed she's going. Mine is with how far I've been. Thankfully the speed I'm going works good, I was worried, without it correct would it be roadworthy.
My s.in.l. has a spare navman he suggests I use and he is going to set it up for me. Just so I know How far I've gone and when I am trying to find places how far I need to go.
Not sure what you call that part of the speedo dash thingy whats-it!!!!!Sorry

Have to agree with you there Dave. I've had people looking for the whole setup to replace but its impossible to find one to fit that age. So have given up for the moment and will go with the navman. Odometer, thanks for that.

interesting idea, i do know when i have our gps on the speedo on that is different to whats on the dash..
not by much though..

Its on my list for next payday. Have ordered from the same people a battery volt meter gauge, that should arrive tomorrow or monday.
S.in.L said no point getting the smart charger yet as not going anywhere for a while where I can plug into mains. So will get it soon and have it fitted before I head off on big trip.

12V BATTERY CHARGER - 12V 10AMP - SMART CHARGER - ABR ebay. $119.00

The battery gauge was 39.95

This ones 4145derek. Fantastic seller. within half hr of paying by paypal I had an email saying it was in the mail. That was yesterday, (express post)

The same smart charger was $160 elsewhere. My s.in.l found it all for me and checked it out.

I have a gps navigator that shows speed and klms travelled, besides where I am, and going to, for about $150. It also plays music on my fm radio , and can be used as an ebook. Its definately more accurate than the car speedo, and I will giving a big test on trip to Cooktown in the next few weeks. If you want , i will post pics and info on it. Bill

-- Edited by bill12 on Friday 30th of September 2011 05:10:48 AM

If you just wanted a speedo reading from the vehicle, not satelite.

Jaycar can supply a LCD kit unit for about $60-70 from memory.  I have made up three of these units to use in the driving school cars, so that the instructor/testing officer can have an accurate speed reading directly in front of them.  They alsohave a speed alert built in.

You apply magnets to one of the drive shafts and a sensor picks up the signal and sends it to the display.

Dusty.

i have a gps with a 7" monitor and that has a speedo function on it as well as speed alert and so on and i use it all the time,,, well most of the time anyway,, if i used it all the time i wouldn't be paying a speeding fine i guess,,, oh well you get that !!!!!!!

Thanks wombat, Knew you would know how to put up a link.

My battery volt gauge has arrived this morniing, great service. They are in Qld so would be quicker for you Dave, if you bought anything from them.

 

Yes Dave, couldn't manage without my S.in.Ls knowledge and help. He's a very clever electrician. Only problem is I have to wait patiently for when he has time to do the installations. I don't mind as I know he will do a great job.

-- Edited by Happywanderer on Friday 30th of September 2011 11:30:30 AM

Beware!  The GPS speedo function measure distance between two straight lines, this is why sometimes your GPS and car speedo do not agree.

I know of people who have been booked speeding, and there defence has been the "true" speed from a GPS.  Sorry, guilty, pay's your money.

Being a driving instructor, I have a very upmarket Garmin in the car, I used to thik this was the answer too.   That is, till I talked to the police at one of our meetings.

That's where I got the above info.

The Jaycar kit comes with complete instructions, but you do need to be a little bit of a geek to put it together.

Dusty

If you do a google search on innacurate speed cameras court cases you may be surprised at what you may find

since 1996 cars manufactured in aust have to show 5kph more than what they are actually doing hence the speedo error and tyre profiles also make a difference as well

Gps print outs on up markets units including Garmin have successfully beaten radar and speed camers readings in court

In Adelaide only just recently a truck driver beat a speeding charge because of a print out from his black box in his truck which had gps data for speeds

 

Never believe what a policeman tells you he after all is only human as well and as I have found personally they quite often make mistakes

 

 

-- Edited by snapper49 on Friday 30th of September 2011 06:12:21 PM

My Tom Tom agrees with Rosy's speedo until about 80KPH and then there's a difference of about 2KPH at about 95 and more KPH. By law, the speedo is the one I travel by. You are definitely unroadworthy if you don't have a working speedo.
Would you be able to find a speedo at the wreckers? Or are they digital these days, and not mechanical like the old ones?
Surely if you're driving through a tunnel you wouldn't change your speed to any extreme degree from the speed you entered the tunnel. That would be the least of my worries.
Going with the other traffic flow is usually a fairly safe practice.
I used to drive a Subaru wagon. It was a mate's car but I kept it running and on the road. It had a computerised instrumentation but was too old to make the repairs worth it.
It almost bit me on the bum when I was picked up for speeding (over 60) in Broome, about 5 metres from the 80KPH sign, and about 500 metres from home. Fortunately the local Policeman was very realistic and gave me a warning about my speed and let me go home. He didn't insist on the speedo being fixed because of the complexity.
I hadn't done anything wrong to attract his attention. He was driving in the opposite direction with the gun on me. Ooops! Phew!