fitted my 2wd fan switch today lads and it comes on ALOT earlier then a standard ERST one, it comes on between 77-86 degrees which is what it says on the side of it, IMO i wouldn't get one that comes on any earlier as you will find youe fan will never switch off lol

about the 4x4 one i dont think that will work as i heard it is a 2 stage switch or something.

Cheers,

Hardeep.