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SPEEDO CALIBRATION

Tech talk for GMH/Isuzu and Great Wall owners

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SPEEDO CALIBRATION

Post by WORKIN »

IS THERE A WAY TO RE-CALIBRATE THE SPEEDO ON A RA RODEO
AFTER FITTING BIGGER SIZE TYRES...
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Joined: Tue Nov 16, 2004 7:38 pm
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Post by rainsey »

Sure is,

Go to Jaycar and purchase their KC5380 Speedo corrector kit ($44.95), takes say an hour to construct, and about the same to fit and it will allow you to calibtrate the speedo in 1% increments.

It goes in line to the speed sensor cable. Simple and very effective.

Cheers

Rainsey
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Post by Utemad »

This is the Jaycar unit in my R7 Rodeo.

http://www.outerlimits4x4.com/PHP_Modul ... 484#459484
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Post by MR04WD »

Utemad wrote:This is the Jaycar unit in my R7 Rodeo.

http://www.outerlimits4x4.com/PHP_Modul ... 484#459484

After 3 diff ratio swaps & 2 correction boxes from Marks Adaptors,I just installed crawler transfer gears & has left me with 7% reduction in final drive (bout 15k's out) :bad-words: .Now I used my 1st correction box which brought it within 8k's of true.
I am wondering whether any soldering/electrical know how is needed with the construction of one of these Jaycar units? Cause I know sweet FA about electrical. :oops:
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Post by Utemad »

What vehicle is this for? RA Rodeo?

You do need to be able to build the ciruit board which requires placing the components in their correct position and then soldering them in. To be able to put the components in their correct place you need to knw how to read the colour codes and other info on the side of the individual components (not hard).

However once the kit has been built you need to find your vehicles speed sense wire (follow wires from gearbox vehicle speed sensor) and then perform a few tests on the wire to decide how to tailor the kit to your speed sensor type (kit instructions explain how to do this).

This kit is also able to be customised (using trimpots) so you can adjust your speedo anything from 99% under read to 99% over read.
I think the 31s on my R7 Rodeo equates to 6%. So you will only ever require the one box no matter what tyre/gearing changes you make.

There is a 'How to build kits' pamphlett available from jaycar for first timers.
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Post by MR04WD »

It is for Hilux,I'm colour-blind :cry: ,I know a few sparkies so I should be able to sort something out......thanx heaps for your info though. ;)
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Post by Utemad »

No worries. We know all you Toyota guys are banging on our door :lol:

Dependant on what year it is it might have a cable driven speedo or an electronic one. I don't know much about Yotas.

You need an electronic controlled speedo for this kit to work.
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