I Have a consistent whining noise from 55mph to 60mph. I have noticed it rumbles around 25mph, turns into a whine under acceleration at 45-60mph. Then above 65mph the engine pretty much drones out the sound. it also whines when slowing down (when the injector cackle noise is not present) replaced carrier bearing, noise still there.
it all happened after transmission oil change. then i did another complete oil change and filter with mobile 1 to see if the noise going to go away but still the same. any help
? thanks, Zaid
and yes it is 1999 ford F450 with a 20ft box used as a moving truck