fuel flow sensing

[Nass Jeff]

Assuming rear wheel drive, mount the magnet(s) on the tail shaft of the
tranny and the sensor in the tail shaft housing.  I believe the Chevy
Impalas (now deceased) have a magnet in either the ring gear or pinion gear
in the differential.  The sensor is mounted in the differential housing.
 You can adapt this theory to front wheel drive hardware to avoid the
undesirable effects of non-rotational drive shaft movement.

Jeff
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Do you know how the Vehicle Speed Sensor works? I am currently working on
a system that uses magnets fixed onto the drive shaft, and a hall effect
transistor. The problem i have found is that the shaft tends to move
around quite a bit (in relation to the rest of the vehicle). As i have
mounted the hall effect device onto the underside of the car, it
sometimese cannot sense the magnet becaues the drive shaft is too far
away. I haven't had a second attempt yet (with longer magnets/stronger and
moving the hall effect device closer) but i was wondering if there is
some other way that i should maybe try.