Speedo Tampering HJ61

Submitted: Friday, Jan 05, 2007 at 12:34
ThreadID: 40891 Views:2946 Replies:8 FollowUps:4
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Hi,

Is there a way of detecting speedo tampering in a HJ61.

Mine has done 250,000 clicks and the speedo oscillates by about 10km/hr through the whole range of the speedo.

Craig
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Reply By: mike w (WA) - Friday, Jan 05, 2007 at 12:44

Friday, Jan 05, 2007 at 12:44
I dont know about speedo tampering, I think that would reguire regearing of the speedo etc, but additions like after market wheels and tyres (different sizes) can throw the speedo out. When I fiited 31's to my rodeo, it provided an approximate 4% error in the speedo, so when the speedo said 100km/hr, I am in actual fact doing 104km/hr (as per GPS speed)

Also, if I remember back to a previous post on this site, ADR guidelines allow for a 10% error in speedos from new??

good luck

AnswerID: 213406

Follow Up By: Mike Harding - Friday, Jan 05, 2007 at 13:52

Friday, Jan 05, 2007 at 13:52
>Also, if I remember back to a previous post on this site,
>ADR guidelines allow for a 10% error in speedos from new??

Nah.

I _think_ I did a post on this some time ago when I actually remembered the details of the ADRs and speedos so you may wish to search for that.

iirc - ADRs test the speedo at 40, 80 and 120kph and it must read at or within some value (I forget what) above true speed. Additionally, the speedo is not permitted to read _below_ true speed anywhere across the range. That's about it.

Mike Harding
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Follow Up By: Mike Harding - Friday, Jan 05, 2007 at 13:54

Friday, Jan 05, 2007 at 13:54
PS. As someone mentioned, below, it's probably a dry cable - oil it with a light oil
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Follow Up By: mike w (WA) - Friday, Jan 05, 2007 at 14:30

Friday, Jan 05, 2007 at 14:30
>Nah.

>I _think_ I did a post on this some time ago when I actually remembered the details of the ADRs and speedos so you may wish to search for that.

Your probably right, I remember reading something, cant be exact on the figures

cheers
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Reply By: Sand Man (SA) - Friday, Jan 05, 2007 at 12:55

Friday, Jan 05, 2007 at 12:55
If the speedo needle is oscillating, the cause is probably a kink in the speedo cable.
Try a new cable.

"Tampering" is usually confined to the Odometer part of the speedo, where unsrupulous sellers "wind it back" by means of an electric drill, or similar device.
Bill


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AnswerID: 213411

Follow Up By: GaryInOz (Vic) - Friday, Jan 05, 2007 at 17:10

Friday, Jan 05, 2007 at 17:10
Given the age of the vehicle it could be a wire broken in the cable and catching every so often, or a kink in the cable.
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FollowupID: 473829

Reply By: Mayesy - Friday, Jan 05, 2007 at 13:38

Friday, Jan 05, 2007 at 13:38
My speedo in my 89 HJ61 VX started a similar oscilating and making an annoying squeal which I put up with for ages. However I eventually took the dash off and injected some oil into what appeared to be a 'dry' speedo cable .....seems to have fixed the oscilating and squeal. Regarding the sunroof...........when mine rusted quite a few years agoI actually had it replaced with a new one.......it was expensive!

Geoff
AnswerID: 213419

Reply By: Bonz (Vic) - Friday, Jan 05, 2007 at 17:22

Friday, Jan 05, 2007 at 17:22
If the speedo says more than 200,000km and ITS STILL GOING ITS DEFINITELY BEEN TAMPERED WITH
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AnswerID: 213470

Reply By: obee - Friday, Jan 05, 2007 at 17:44

Friday, Jan 05, 2007 at 17:44
sounds like the cable needs attention. I recently had same prob plus squealing noise like a flying saucer taking off in a black and white movie. I poured penetrating oil down the cable and into the back of the speedo and just like new.

Bad news is that the cable might be getting ready to snap off. I have seen that problem too.

good luck

Owen
AnswerID: 213477

Reply By: hoyks - Friday, Jan 05, 2007 at 17:54

Friday, Jan 05, 2007 at 17:54
I doubt the cable would be snapped if it is still working. Lube it up and it should get better. The one in my nissan has been doing it since 50000km. I tried to fix it a few times, now I just live with it.
AnswerID: 213480

Reply By: luch - Friday, Jan 05, 2007 at 22:21

Friday, Jan 05, 2007 at 22:21
The only way you can detect speedo tampering is by any marks on the face of the speedo finger prints (like wet oil or grease spots)

3 reasons why the needle is moving

1. Cable is about to break

2. Speedo is about to stop working (wear inside ect)

3. Speedo cable has been disconnected at some stage when the Cluster has been removed (eg, Globes replaced, problems with another gauge)

DON'T RULE OUT THAT THE WHOLE CLUSTER COULD HAVE BEEN REPLACED AT SOME STAGE IN IT'S LIFE !

i know of someone who has a car where the fuel and temp gauge stoped working, brought a whole cluster at the wreckers an installed it less work than changing the gauges
AnswerID: 213539

Reply By: Dave198 - Friday, Jan 05, 2007 at 23:10

Friday, Jan 05, 2007 at 23:10
Craig, I think if you want to lubricate the speedo cable, I would be inclined to pull the inner cable right out and clean it thouroughly before re-oiling it.
There might be some dried up oil on it that is binding a bit.
Dave
AnswerID: 213549

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