[hybrid800]

Are there any clocks from other VWs that work?
I believe this is a problem with 96-98 years - the first with non mechanical speedometers.

the first t4's with non-mecanical clusters, they were in Corrado & Passat cars from ~'89-90.

the problem with fitting a car cluster is compatability, theres several diferent 'basic' types before adding 'extras' like revcounter & MFA display.
so, first problem is tacometer signal, this runs the oil-pressure warning light system in the cluster.

t4's with the mecanical diesel engines use an alternator derived signal (from the infamous 'W' terminal).
t4's with electronic engine control (2.5tdi & most petrol / fuel injection) use an ecu derrived tacometer signal.
t4's with carburettor / petrol engines use the ignition-coil for signal. (rare now as on early t4's)

cars can have;

ecu.
ignition coil.
alternator 'W' terminal.
supplying the tacometer signalI:

so, theres only a few clusters that could work with the diesel engine's wiring & then they do not have the rear-foglamp 'telltale' warning light as t4 clusters do:*

if youve a 1.9td then you need a cluster that uses the 'W' terminal signal so a B4 Passat td cluster (rare & uncommon with electronic speedo, more common with mecanical speedo)

or you can convert the t4 to the older mecanical speedo (fit cable to gearbox after removing the electronic 'hall-effect' sensor) - possibly worth looking into?

Rich.