I had a van that ended up with a broken transmission once because I accelerated too fast, but the van was old anyway, so that could've been why. I just want to preserve my car and help keep it running well, so I wanted to know how fast I can accelerate (RPMs-wise) without it being too stressful on the car and what's most likely to break from doing that? Today, I reached the 5 on the guage and it was loud as heck!