I didn't notice anyone mentioning a new feature in 2012 Tacoma V6 automatic transmission: engine brake (some type). I'm not talking about automatic downshifting and that's it, that is not engine brake, is just a way to mess the transmission. I'm talking about a device which creates a back-pressure in the engine or something like that.
If you look inside engine compartment towards passenger side fender there is a new "thing" installed, which is connected with a small rubber pipe somewhere in the engine. The strongest feel of engine brake was around 40-45mph (65 kmh) going downhill and if I would press the brakes continuous for like 4-5 seconds transmission downshifts and I felt a strong braking force, much stronger than just a simple downshift, and the truck was holding around 50mph, without me touching the brakes. Also, a slight touch of engine brake was almost always available when approaching stops.
All good for 6 month then ... don't know what happened, going down same hills doesn't even want to downshift, and if somehow does it feels more like a simple downshift, just the transmission keeps me back.
Anyway, does anyone knows how this "thing" works, or is just my truck weird? (or me... )