shortride

iTrader: (1)

If you have fairly keen hearing, I would guess that some people could hear the rear-end. If you have aftermarket tires on your truck that is also a very good candidate for making noise that you normally would not hear with stock tires. Depending on the tread design, tires can make a different sound on acceleration than they make on deceleration.

Extreme F-150

Holy crap I guess your right!! Well wait! No the 5.0 came out a little before the Eco did. It was the new engine in the mustangs new body style change first. Then they started putting it in the F-150 when they came out with the Eco. That's when ford did away with the 4.6L v8 and 5.4L v8. Now all they have is the 3.5L v6 Twin Turbo Eco, and the 3.7L v6 and the 5.0L v8. Oh and the big boy 6.2L but that only comes in the SVT Raptor and the Platnium edition and I believe you can get it in the 3/4 tons and up for gas instead of Diesel engines. I could be wrong though!

Shan

The rear end does have a slight whine to it on a decel that you can hear but out of everyone that has ridden in my truck no one has noticed it except me. If its overly loud then you might have an issue but if its faint it probably is normal.

montanaman

Hi Guys -

My .02 cents worth -

If you hear a noise out of your differential like that the dealer should tear it down and repair it - pronto, under warranty.

That sturdy 9.75 differential has been around since the earth cooled, and they just don't have a problem with whining.

In another thread, I've been talking about the project of swapping out my conventional differential with an Eaton True True Trac, and after 36,000 miles, including some hard work, the carrier bearings still look like new on the old carrier, and everything else was still fitted.

I only put in new carrier bearings because I didn't want to risk damaging the original bearings by pulling them off.

That synthetic lube that they took out of it seems thin compared to the dinosaur oil they put back in it, so I suspect it'l be easy to hear a problem.

After all was aid and done, I could have swapped out the carrier myself, because when the Ford Guru put it back together, the original shims were perfect as far as clearance/backlash/whatever else they check -

Good Luck.

BWilliams

2013's can have the 6.2 in almost any trim now... I know it's available in the Lariats and FX lines, at least. Not sure if XLT can get it.

NASSTY

The Ecoboost was in the Taurus SHO in 2010.

Centexguy

The ecoboost has NOTHING to do with the drivetrain. NOTHING!!! So don't try and relate the two just to hate on the Eco.

Extreme F-150

WOW THERE LITTLE DOGGY!!! LoL... No one is hating on the Eco boost there bubba!

Extreme F-150

Yes your right! I totally forgot about the Taurus SHO ford brought back out a few years ago. :face palm:

texasbill

Thanks for all the input. I figured that something wasnt right I was just unsure if others were having the same issue and getting the same BS line from the dealer saying is was normal.

Also I was unsure if something else could be causing that kind of whine and it not be the rear end.