Need some help here guys.
My truck is an '04 F150 FX4 with the 5.4L. 140k miles.
Last week this whining/grinding noise started when I was going up the on-ramp to the interstate. It scared the heck outta me because it just sounded nasty. Almost like rocks in a blender type noise. It is coming from the front end.
It will do it when accelerating but will go away once O/D kicks in and I start cruising. Other than that it shifts just fine and everything.
I've searched and searched and found everything from IWE Solenoid, to torque converter, to water in vacuum lines, etc.
I took it to my mechanic today and he wants to drop the pan and check out the tranny. I'm really hoping I don't have to replace the tranny
What do you guys think? Any ideas?