Installing an R380 gearbox oil cooler - questions for the gurus

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Originally Posted by sierrafery

I was thinking to that too, my idea is to addapt to the cooler an adjustable N/C oil pressure switch set to minimum(as i dont know the pressure but there are switch versions starting from 5 psi) and wire it into the transmission temp warning circuit which is certainly there in C0668-4 under the console or C0048-1 under the steering wheel....then if the warning comes on while driving it's sign of some trouble

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I think a low pressure sender and gauge or warning light would be the best solution as you would instantly see any oil loss in the system, you could also fit a temp gauge for peace of mind.

Just for the record I used the same cooler that you are using
I fitted it to a td5 Defender years ago and it has worked well the transfer usually runs hotter that the R380
I like the idea of a float switch as the absence of oil will be quick and final

I have a spare coolant alarm. The type that just sensors fluid to complete a circuit. I am thinking of using this in a blank plug. This way should there be a leak the level of oil will drop below the sensor and a buzzer and led will sound. Does any one have any comments if this is a bad idea?