Thread: What Rangie first had Elect Speedo

Hey Keith, My 90 model rangie has cable to a transducer which is mounted on the chassis, then electronic up to the speedo unit itself. Talking to Murray the other day (Jag and Rover at Newmarket) the transducers are the same on the discos as my rangie - hope that helps. Think the speedo changed when they went to the 3.9 from the 3.5

Did you get the bits you need for the auto surround?

Thanks Guy -yes bought an entire surround - was annoyed as I took it out of the disco but was not careful and lost many of the small clips/nuts/washers and one of the mounting brackets - so I bought the whole lot again for $50.

The 94 Disco wiring loom from the disco transfer case is wire all the way from just behind the brake drum to the speedo on the dash.

So in your 90 Rangie are you saying there is a round speedo (mechanical) cable from the transfer case to a box (transducer) on the chassis and this is then wire (electronic) to the instrument panel?

Looking at the wiring diagram on for the 90 Rangie I see a transducer and the instrument panel is electronic (my disco manual say the change over was march 94 for the discos - I presume this is when they switched to 3.9 too).

I wonder if I can simply unbolt a 90/91 Rangie speedo from the instrument panel and run a ignition-fuse-transducer (on transfer case - i.e. wiring loom on the auto)-Electric speedo (on instrument panel) circuit.
I have another issue and that is the warning sensors on the 94 auto - not sure yet if the Rangie had the Warning lights on the dash for (a) transfer oil temp (over temp) or (b) diff lock engaged (not for this I know).

What year did the Rangie stop the viscous coupling and go to manual centre diff lock? May various manuals show this for 90-94 as viscous. So I suspect for the warning lights I might have to rig up my own light panel.
I wish I had kept the 94 disco instrument cluster now - rush to clear the shed/garage a mistake.

Keith

So in your 90 Rangie are you saying there is a round speedo (mechanical) cable from the transfer case to a box (transducer) on the chassis and this is then wire (electronic) to the instrument panel? -

Yes the cable connects between the handbrake drum and the transfer then as above.

I wonder if I can simply unbolt a 90/91 Rangie speedo from the instrument panel and run a ignition-fuse-transducer (on transfer case - i.e. wiring loom on the auto)-Electric speedo (on instrument panel) circuit.
I have another issue and that is the warning sensors on the 94 auto - not sure yet if the Rangie had the Warning lights on the dash for (a) transfer oil temp (over temp) or (b) diff lock engaged (not for this I know).

Mine was viscous coupling so had to fit aftermarket light to show cdl engaged, don't know if I have an oil transfer light for overheating, originally these were to the left of the radio at the front of the centre console

What year did the Rangie stop the viscous coupling and go to manual centre diff lock? May various manuals show this for 90-94 as viscous. So I suspect for the warning lights I might have to rig up my own light panel.
I wish I had kept the 94 disco instrument cluster now - rush to clear the shed/garage a mistake. -

I think this is the other way around they went from CDL to VC in the late 80's for the classics, I have know idea about discos though.

I can confirm that the 93 RRC had a short speedo cable then tranducer.(called the vehicle Speed Sensor or VSS)

Mine has an overtemp switch for the Auto in the cooler line.

There is also a switch on the upper front of the BW transfer which I assume is an overtemp switch as there are no other indicators or sensors that are likely . I was hoping correctly that it was my ZF temp sensor that had died on my recent trip as I saw no way of removing the transfer one without removing the transfer!

I guess it depends on whether the ratios of the gears are the same on whether you can use a Disco VSS. Common sense suggests that you can. ie the ratio from the transfer into the VSS is probably the same for both, seeing they both use 14CUX, ( as the VSS is mainly to tell the 14CUX whether you are moving for the stepper) but with LR you never know.

Range Rover never changed back to LT230. All RRs after 89 have viscous including 38A.

Thanks Guy and Philip

Yes aware that Rangie started with CDL then went to Viscous - thought they must have gone back to match Disco hardware later.

I am hoping if I get a 90/91 Rangie instrument cluster I can mater this with a wire from the LT230 transfer and thus have a working speedo

The transfer in the Rangie was a replacement one with a mechanical brake drum so suspect it is form an earlier Rangie or Landrover which had cable speedo.

An alternative is to take the ZF off the transfer I have on the floor from the Disco and mate the ZF with the Transfer in the Rangie now. Just more work plus I would need to buy new seals etc I guess.

Easier to transplant the disco ZF and transfer as one unit IF I can get the speedo to work - warning lights I can wire up easily.

Keith

Rangies that had LT77 and LT230 had mechanical speedo.

The way the VSS mounts to the LT230 in my 98 disco is exactly the same as how the mechanical (cable driven) speedo in early rangie.

If I was you, I would just remove the VSS from the disco LT230 and stick the rangie cable into the worm gear.

I'm not familiar with the VSS used in a 94 disco, but I know mine (98 disco) is a lot different to the early 90's rangie VSS, which has the short square drive cable between the drive worm and VSS.

There are different worms, with different numbers of starts/teeth to suit different tyre diameters. If you find the speedo calibration is out, then you might need a worm from the model rangie you have (assuming stock tyre size).

The worm just pulls out from the t/case extension housing when the retaining nut and clamp for the cable/VSS is removed. There is a steel bush that has seals inside (for worm) and outside that has to be levered out with a flat blade screw driver.

The space between the rear of the t/case and backing plate for hand brake is restrictive but it is simple enough job.