BigOL3
Well-Known Member
Lifetime Member
I suspect removing/opening windshield would help a lot in taking care of that problem.The area under seat must have more pressure building up causing air to flow into cab running down the road. Over 20 MPH or so the pressure under the seat over comes the fan blowing back. I would think anyone adding vent holes in bulkhead under seat would experience this. I do have full windshield, roof and hard back panel.