Speedo problems

[BlackNavara]

Just wondering if anyone else has the same problem? I have a near new Navara with a speedo problem. When I'm cruzing along at 80kms in traffic it feels like I'm going slower than everyone else. My sat nav says I'm traveling at 74kms where as my speedo is at 80kms. Its always around 6kms slower than the sat nav. This is frustrating me and would like to know if anyone else has the same problem. Cheers

[Outnabout]

This is not a problem, more like normal, just about all vehicle speedos will read fast, I think its a conspiracy so they get better economy figures.
I have higher profile tyres fitted which has the speedo reading slow by about 2km/h.
Chris

[Nomadic Navara]

There are quite broad specifications for the accuracy of speedometers. You can see the specs in http://www.comlaw.gov.au/ComLaw/Legi...AL+FRLI%5D.pdf

The specifications do not allow the spedo to under read. My spedo is further out than BlackNavara's. From 80 km/H it reads nearly 10 km/H fast.

Below is an extract from my link

PeterD


Annex 3

TEST OF SPEEDOMETER ACCURACY FOR CONFORMITY OF PRODUCTION

1. Test conditions

The test conditions shall be as set out in paragraphs*5.2.1. to 5.2.6. of this Regulation.

2. Requirements

The production shall be deemed to conform to this Regulation if the following relationship between the speed indicated on the display of the speedometer*(V1) and the actual speed (V2) is observed:

In the case of vehicles of categories M and N:

0 ≤ (V1

[BlackNavara]

Thanks guys for the info.

[DaveO]

My '06 D22 is absolutely spot on - at all speeds - checked with 2 different GPS units just to be sure. Strange that "some do, some don't"

[Tom]

Hey BlackNavara, my speedo is now correct after putting on bigger rubber. Im running a set of Good year MTR's 265/75/16's where before the speedo was out about 7km's. I have fitted a 50mm lift using EFS springs and tough dog adjustables and am very happy with this combo. I barley noticed the difference in gearing at road speeds.

[RBarter]

There is nothing unusual with this situation, encountered in many brands, what I can't understand is the speedo indicates one speed and the GPS another, however the Scangage reports the same as the GPS, go figure!

Russell.

[Dave]

My STR is 4km/h (reads slow) out with my 32's at 100km/h. When I had the original tyres on 31's (there abouts) the speedo was dead accurate to my GPS.

I have driven a YD25DDTI CRD powered D22 and D40 and both were 9km/h (reads slow) out at 100km/h.

Dave.

[Laith]

My speedo read 7ks low after my bigger tyres were fitted.

I only recently built a speedo corrector kit from Jaycar elec and installed to rectify the error.

Kit cost about $50 and is adjustable.

[joshy]

mine read accurate with 31s and is now 10-11% under with the 35's