When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I’m literally dealing with this right now. 2018 with 8,000 miles. Started hearing a whiling/humming noise as I accelerated past 40 mph and I’d hear it wind down when I slowed lower than 40 mph. The dealer took a look at it, said the noise was coming from the front diff so they opened it and found metal shavings in the oil. They replaced the front diff yesterday, under warranty.
Makes me kind of worried I only have 8k miles in less than 1 year of ownership and the diff failed already.
something doesn’t add up here. Unless you are running in 4A or 4Hi all the time, the front differential isn’t moving. It disconnects at the wheels via the IWEs and at the transfer case. It won’t whine unless it’s turning.
I was wondering how long I could reasonably expect a rear diff to last in my truck. It's a 2017 XL 2.7 and has 35500 miles on the clock. I don't tow with it or spend much time off road and generally its used as a car would be - school run, shops, camping etc. Nothing major.
I noticed the tell tale diff whine a week ago, so booked it in as its still (just) under warranty and the dealer replaced the diff no questions asked!
I asked if it was normal for a F150 diff to break at 35k or whether something had caused it, but to be fair they weren't interested in determining why it broke. The service guy just said '...yeah it happens. Its not unusual to have 30k trucks with broken diffs...'
Are Ford making their diffs out of chocolate now or this is the state of modern vehicle parts? How long can I reasonably expect the new diff to last? Thanks
Search around the forum, about a year ago this was mentioned.
There were reports of differential pinion bearing failure before.
Probably this dealer and the service guy has seen a few show up already.
Does that mean that you don't run with scissors anymore?
Not quite... Meet my new significant other, designed to kill me in ways that scissors cannot, but will bring me to the top of that rough trail without beating the crap out of my Ford truck, and its differentials! One day I'll grow up completely, but I'm not quite there yet!
