As with the engine oil in the Toyota Tacoma, the one in the gearbox gets altered over time too and looses its properties, meaning that you will have to change it.
The interval for changing the transmission fluid is written on your service manual. If you do it at home, you’ll need a basic toolbox with with ratchet and extenders, a funnel as well as the replacement fluid according to your spec. Here are the steps:
Identify the refill, drain and overflow plugs according to the video bellow
Unplug the refill and overflow plugs
Drain the fluid from the drain plug
Screw in the drain plug very snug but not overtight
Fill the fluid through the refill plug hole until it starts to drip out the overflow hole
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