1999 plymouth grand voyager 163k tires are new since last year. Van is making loud noise–sounds like I’m driving a truck–seems to be working fine, but what could cause loud noise–seems to be worse in the rear–noise increases with acceleration then levels out
Uneven tire wear or other tire problems (e.g. belt separation).
Bad rear wheel bearing(s)
Could be an exhaust leak if it’s louder when accelerating and levels out at speed, or just the muffler is shot.