When configuring the output to the Rear Seat transducer this is a great location to turn on “gear change” impacts as you’ll really feel in throughout your butt and spine. For the TST329 I have found that ~80Hz works well as it is fairly “rapid” and still has high energy. This is also a great spot to utilize engine vibrations, especially if you already use them under your seat, as you can set up engine “harmonics” between the two transducers – this takes a bit of time tweaking but really improves immersion.
Mounting to the pedals directly is not typically possible, but rather you would mount to the deck plate that the pedals are mounted on. A metal deck would be ideal but a plywood deckplate would work as well. In the picture below a TST239 Silver Transducer is installed under the pedals and directly to the supporting metal deckplate. This is a very stiff arrangement and the higher power Gold Transducer was deemed overkill for this application.