rough or gringing at 1500 rpm
I have a new 2008 ranger (4k miles) with 3.0 V6. When driving at around 1500 rpm with A/C on it has a rough or grinding feel to it. Without the A/C it's fine.
Dealer changed the serpintine belt which did nothing to fix it.
My question: has anyone heard of this before. I suspected a faulty compressor but before I battle with the dealer I want to be sure it is not something normal due to gear shift ratio with A/C on.