For some time I've had kind of a rubbing/screeching noise when the tachometer reads between 2000-2250 rpm. (No sound below that level, and it disappears above it.) I had thought it was in the drive train, but my mechanic (excellent but not a LR specialist) said, based on listening to the sound, that it's actually coming from the cable.

Has anyone had this issue? Solutions?

What would be involved in reaching the cable? Can it be accessed through the engine bay? Does the dash need to be removed?

Any general guidance would be much appreciated.

 

D1/D2 does not use any sort of cable for the Tach if that's what he is talking about. The entire gauge cluster = electronic. Check your front drive shaft u-joints IMHO if you have any kind of squeaking/chirping/clicking/grinding before it's to late!

 

That's what he thought when I described the problem to him, but when he listened to it, he said it was clearly coming from behind the tachometer display (way to the left of center on the vehicle) and not from the drive train.

I have an aftermarket driveshaft. We remove and inspect it annually and keep it well-lubed.

Of course you're right that the tachometer display is electronic, since the rpm shows in my code reader when showing live data. Is there some mechanical part behind the display that could be causing the noise?

To rule this out, is there some way of disabling the tachometer display, so I can see if the noise persists?

 

There is fan near the dash dimmer that can resonate to certain rpm vibration and mislead you. If you disconnect it would rule-out being the cause. I think it is part of cabin climate sensing.

 

Yep fan is by the mirror adjustment switch behind the little vent looking trim.

 

Yes, that is where the sound is coming from, any idea how to disconnect it?

 

Any idea how to access/disconnect it?

 

Cannot remember what I did a decade ago... Time to check the service manual.

 

It looks like there is a large panel just below the steering wheel. Looks removable and may provide access.

 

From memory, that little vented panel should just push outwards from behind. You can then clean and lubricate the fan with some silicone spray.