I have a humming/whinning noise coming from my dodge. The noise doesnt start until the vehicle gets warm. Sounds excellant when its cold. It sounds to be coming from under the floorboard towards the back of the engine/bottom. This motor only has 29,000 on it and I cannot figure it out. So far to date this is what was done and still didnt solve it.
1 The belt was taken off and the truck was run without the belt and the
noise still persisted.
2. The cats and y pipe were changed
3. Front rear main seal was changed
The noise is there whether or not the truck is in gear or in park. Sound is consant at idle but sounds a little faster when reved up almost as if something is spinning. One garage told me that the sound is normal which I know is not. Second garage told me that it could be a valve guide or rocker shaft issue but they would need to take the head out and look at it costing me around $500.00. Another says toque convertor or trans pump. They say the can hear it the loudest on he y pipe. I found this video which is the exact same situation and sound as mine, what do you guys belive it could be?