Since it's the auto, I'd look into an auxiliary trans cooler. Google Tacoma pink milkshake.
Also, that should be a 5 speed auto being an '08 4wd V6, even though it may only show 4 positions on the shifter.
The previous owner of my '91 bought it new. Now has 322k and still does the job. 3.0 V6 5 speed stick.
http://i565.photobucket.com/albums/s...psxvmewadw.jpg
He bought a new Tacoma in 2015 to replace it. He knew nobody would give him anything on trade for it because of age, mileage, 2wd and no a/c so he gave it to me. :)
Here's his replacement. 4.0 V6 6 speed stick TRD.
http://i565.photobucket.com/albums/s...pspgrf9jmo.jpg
Used Tacoma pricing is stupid around here. 4 year old ones with 4wd and an extended cab and 60-85k miles are being listed for $22-24k.