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Sump plugs threads and size gearbox, transfer and engine

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Hi. Im fitting a few temp meters to my cars. Can anyone give me the size of the sump plugs so I can order correct adapter to fit with the VDO temp meters?

LT230 Transfeerbox

R380 Gearbox TD5

LT77 Gearbox 200tdi

Engine sump plug td5

Engine sump plug 200tdi

The adapters I can choose from are

3/8 BSP






I gonna do the classic finger in the whole method. So it would be nice to have the right sizes at hand..

many thanks

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Well I can confidently tell you that none of them will fit cos none of them are big enough!

Kind of doubt that. The LT230 plug looks a lot smaller then M18... Maybe it better order new plugs and then drill and tap for the sender instead.

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Can't remember the lt230 to be honest, but the lt77 one is huge, and the one on my 200tdi is huge too - uses 1 1/8" af spanner to undo.....

Depending on what you use your truck for I would be inclined to find somewhere other than the drain plugs to put sensors into as they'd be very vulnerable to damage off road otherwise.


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