Thread: abs sensor on non-abs hubs - feasible?

Why not fit the speed transducer at the transfer case?

Abs sensors came with the axle redesign in the early 90's. If you don't have those axles then a complete set from a rolled disco is the easy way.

wheel spin will see a whole range of problems if you ever have to rely on the odometer.....

trandfer case transducer is the best idea, later (1994 on) disco 1 has one in the case.

jc

As do all 3.9 Range Rover classic, with a short cable and a transducer.
Regards Philip A

so far, no plans for changing axles.
what wheel spin you are referencing to? right now it has no abs, and I don't intend to change my braking system.

what those transducers actually do? convert rpms to voltage? convert rpms to some angle? just change the RPM ratio? how are they designed? do you think it would fit instead of my old cable? I just can't see the whole picture.

The transducer changes the rotation of the cable into electrical pulses that can be directly read by the speedo of the same model EG 89 3.9 Range Rover onwards or D1 with injection.
If you replace your instrument cluster with one from a 3.9 then the speedo will work if connected to the transducer.

Regards Philip A

got it, thanks! I've just seen some posts with images of the transducers guts - can't understand what makes them so expensive.
probably, i'll play a bit and try building my own transducer (i've got a hall sensor for $1, some epoxy for the case, couple of aluminum plates for the basement and for the disk with small round magnets fitted inside it, and a bronze bushing for the shaft).
what really bothers me is what's inside the transfer case - how's the shaft of this transducer is engaged into the inner gears of the transfer box, what makes it sit inside, not sinking down into the transfer case.
it could also be that this bad engagement inside the transfer box is the real reason for my inconsistent speedometer readings… probably I should keep that flange clean before removing the speedo cable?

I'd be very grateful if anyone could provide me with the dimensions of the transducer's flange and its shaft so that I can fabricate the device before I am able to get to the car…

it seems that the old-style mechanical speedo sensor's design was basically a blind hole in the transfer case with a sealed shaft rotating in that hole and with a square hole in the shaft? and the speedo cable was inserted into that square hole in the shaft? this means that I can easily build my own transducer, provided that i know those dimensions...

just made a decision: will be using sort of a dremel tool and one of these, locally available for $5 :-)
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