I have an interesting occurance here... between 2250 & 2500rpms in 4th (highway, 60-70mph area) I get a whine almost identical to a turbo spinning up, my car doesn't have a turbo, and it only happens during that time. it rises in pitch as the rpms go up, and disapears just after about 2600rpm.... I'm not sure if this is something I should be concerned about, the car runs fine, no change in fuel economy, idle, throtle response, etc. Ideas maybe?
Thanks!