I've had the upper insert and lower dogbone mounts on my 2.4 for a few years now, and I had a thought the other day. Since these are designed to limit motion of the engine, do they transfer that motion to the tranny? Could this cause stock tranny mounts to prematurely go bad?
Im not 100% on this but im sure you would be best off with Poly bushings all over
Also the TTR upper mount is way better than those inserts. Little to no vibes from them.