Between 40 and 50mph, I hear a humming noise and I can not pin point the origin. It sounds as though it is coming from the rear???? Here's the interesting part. I only hear it when I apply constant and even pressure to the accelarater, and maintain constant speed. It goes away if I accelerate or take my foot off the gas. I have an 02 Screw with 45k, does anyone know what this sound is? Thanks for any input

 

no but I have the exact same thing I have a 05 f150 5.4 exact same thing there is a tws or something like that out on it ford has a kit includes a ring and pinion and gear kit if thats what it is might take mine to the dealer Mon if they are opened still have a 1000 miles left on my warranty I have a 3.55 ls see if they well chang it to a 4.10 thanks and good luck

 

Got a spare $1000?

 

 

I would like to know because my 98 with 100k miles is doing the exact thing to the letter. Only between 40-50mph. I got a price on swapping the rear ends today but would rather save the $900 if its something minor. I was told its probably pinion bearing.

 

no luck on the 4.10 siad he would have to send the 3.55 back in so I get free 3.55 said he would put the 4.10 in for 650 labor and about 349 for the gears yeah right but that was the problem

 

Sorry - I was $1 off!

 

shop manager said if I would buy the 4,10 gears he would put them i free under warranty he said he would send for the fix for has for the rear end which is a 3,55 ring and penion and the bearings he would send mind back in then he would put the 4.10 and the bearing and all for free under the warranty then he would have the 3,55 for his trouble 309.00 final cost for me so ypu where still off a little

 

That's a very fair deal.