One problem related to power train has been reported for the 1998 Toyota Tacoma. The most recently reported issues are listed below.
My wife stopped at the edge of our driveway to let a pedestrian pass and then proceed to enter the driveway by making a right turn. As she accelerated to entered the driveway, the Tacoma took off with the engine screaming at a very high rpm and, despite her efforts to stop the truck by pressing hard on the brake, she crashed into the garage and east wall of the house. Despite the enormous damage to the front end of the vehicle, it is a total, I think, the air bags never deployed. Obviously the Tacoma suffered from the same accelerator problem that has plagued Toyota units. My wife, the driver, suffered bruised ribs and a headache. Fire and police responded to emergency call.