I think intercooler and bigger turbo or more boost will help with on road and rolling towing but TBH om my 285 /75's first gear is a bit too high even when not towing for casual off road trundling around....I'm often either going just a fraction too fast at idle or in low box....same if stuck in traffic just rolling at tickover is too fast..... I've been in low box on the M25 before now just so I can trickle along in a traffic hold up !