Outer Limits 4x4 Board

Heys guys,
I was just wondering if anyone can point me in the right direction as to where is the taco sensor on a TD42? I have a 1991 GQ SWB.

Thanks in advance.

the tacho sender is on the front of the motor just to the right (looking at the engine from the front) and up from the water pump, its 2 bolts and a wire loom coming out.