The Toyota Tacoma is equipped with a timing chain rather than a timing belt. Timing chains are typically more durable and require less frequent replacement than timing belts. However, it's still important to maintain the engine properly and check the timing chain for any signs of wear or issues during regular service.
4 cylinder Toyota Tacoma's have a timing chain. The V6 has a belt.
Timing Chain......
It appears that the 1996 Toyota Tacoma has a timing belt.
Chain
Your 2006 Toyota Tacoma has a chain and not a belt. No maintenance is required.
It has a timing chain.
Timing chain.
Timing CHAIN (s)
It must have a timing CHAIN , the Gates website does not list a timing belt for the 2006 Toyota Tacoma 4.0 liter V6
On a 1996 Toyota Tacoma : The 2.4 and 2.7 litre four cylinder engines have a timing CHAIN The 3.4 litre V6 engine has a timing BELT
The 2.7 liter four cylinder engine in a 2007 Toyota Tacoma has a timing CHAIN
Timing chain.