Odometer Overclocking / Cluster Part Failure

[mowgli]

Reposting (had initially posted as an introduction by mistake)
....................

Hi all,

I hope you are well. I am based in Nairobi, Kenya, recently bought a second hand Nissan Patrol 2004 TB45 (4.5 Liter Petrol). The odometer is overclocking, for example, 5km for every 1km travelled. I took it to my local mechanic who have diagnosed a cluster fail and quoted USD 2000 for a new cluster. Though from my google searches I can see this is quite a common problem / defect for Nissan Patrols with lots of different options out there to fix, from earthing, to correcting voltage sparks / fluctuations. I am not a mechanic or mechanically savvy enough to do these.

Basically wanted to check if anyone has had a similar problem and if there is a temporary or permanent fix to the issue? My concern is spending money on a new cluster and then the problem still continuing.

Thank you!

Mowgli

[4bye4]

Does the spedometer show the correct speed or is that incorrect as well? Not sure how a 2004 mod works but if both the speed and k's travelled are out I would think the sender end of things ie. gearbox. If only the distance is wrong, I guess the cluster somehow "calculates" the distance from the speedometer, either mechanicaly or electronically. Small descrepancies somtimes occur because of wrong gear ratios, wrong diffs or different size wheels, but 5:1 is hugh.

[mudski]

Does the spedometer show the correct speed or is that incorrect as well? Not sure how a 2004 mod works but if both the speed and k's travelled are out I would think the sender end of things ie. gearbox. If only the distance is wrong, I guess the cluster somehow "calculates" the distance from the speedometer, either mechanicaly or electronically. Small descrepancies somtimes occur because of wrong gear ratios, wrong diffs or different size wheels, but 5:1 is hugh.

Yeah the first thing I'd check is the speedo gear tooth count. You can PM me your VIN and I can see what it should be and then you simply remove the sender unit from the box, one bolt, and see if the gear is what its supposed to be.