Some of the above info is not quite accurate.

The only electrically-controlled part of a Gen I auto trans is the overdrive solenoid. Otherwise, it's all done through hydraulics in the trans. There is a TV cable to signal the "throttle position" to the trans, but again, it's a hydraulic/mechanical thing, not electric.

Tommy

90 LWB Montero, 270k, 265/75R16, 16x8 ARE Bajas, Budget Lift, Towbar, Aux Brakes (towed with camper), Jotto Desk, remote oil filter
92 bone stock base model beater
Parting out 4 more