Vehicle & Technical > Discovery

auto gearbox over heating n-reg

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chaosego:
writing this on behalf of my pops he has been towing a small caravan up a hill the gearbox over heated what could cause this and wheres the best place to get a uprated oil cooler he is after a bigger caravan so it needs sorting soon ta glyn

beast5680:
cooler blocked externally? overfilled with oil will also cause an overheat
collapsed cooler hose?

muddyjames:
mud on the radiator for the g/box? that is how mine over heated and also the thermostat had very usted contacts that fell appart as soon as i touched them so possibly a new thermostat thingy? very easy thing to fit. a genuine 5 min job.

chaosego:
thanks will pass on info so he can investigate further, so i am gathering there must be a fault or under normal conditions it should not over heat? cheers glyn

RichardM:

--- Quote from: "chaosego" ---thanks will pass on info so he can investigate further, so i am gathering there must be a fault or under normal conditions it should not over heat? cheers glyn
--- End quote ---

I would expect it is a fault, I have never seen my gearbox temp light come on apart from when I had a fault.  However that was a very simple fault, the wires from the thermostat were frayed where they rubbed against a power steering pipe and occassionaly the warning light would come on when they rubbed together.  After fixing them the light has never come on.

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