It has a chain and gears. NO BELT. There would be no reason to fool with the timing chain and gears on that year engine. The chain and gears would out last the engine.
The year and engine info would help.
You need to replace your clutch.
Assuming we are talking automatic transmissions, you would use park or neutral to start the engine but neither one are gears.
Engines work best in a limited range of resistance and rate of rotation. Gears makes it possible to have the engine running in that range (almost) regardless of what speed the vehicle is moving at.W/o gears the engine would first struggle to get the car moving(where the resistance is too high), and once moving, the engine would struggle to get the car to speed, as the engine soon wouldn't be able to spin any faster.
Because the number of gears in the transmission has NOTHING to do with the number of cylinders in the engine, there is no way to answer this completely. However, since a one cylinder motor is only possible with a 2 stroke and a HUGE centrifuge, there would be no way to have multiple gears in a one cylinder engine. It would have to be a generator of some sort with a single ratio clutch system, like one could find in a lawn mower type engine.
Gates ( they make timing belts etc. ) shows ( 90,000 miles ) for the 1998 to 2004 Toyota Tacoma 3.4 liter V6 engine timing belt
That engine doe's not have a timing BELT. It has a timing chain and gears. The chain and gears are about $60.00 the gasket is about $12.00 and the Labor would run about $150.00.
If it had a timing belt, you would replace it at 90,000 miles. But this engine has a timing chain and does not have a belt.
It was a coil pack.
Next time an engine size would be helpful :-) 2.4L engine = 5.3L 2.7L engine = 5.1L 3.4L engine = 5.2L - 5.4L Above includes changing the filter
From the Toyota website, "For Timing Chain and Gears, there are no prescribed replacement intervals; these components should be replaced as needed." ANSWER My mechanics have recommended every 250000 to 300000 when asked about replacing a timing chain. It should last as long as the engine. It is very expensive so I would only replace as necessary.