Replaced rear driver side tire today. 2018 Titanium

[flymore]

My rear driver side tire picked up a screw and started leaking. Screw was to close too sidewall for repair and had to be replaced. 

 

All four tires were 80,000 mile tires with only 11,000 miles on them. Tires haven't been rotated.

 

Tire shop replaced the tire with exact same tire brand and tread under road hazard warranty.

 

Asked if it was ok as this being an AWD, they said it was because there wasn't a lot of miles on them.

 

Is this ok? Should I get the tires rotated? That would put the new tire up on the front passenger side.

 

Thanks

 

[dabangsta]

2/32 - 3/32 difference should be okay. Anything more you might end up with AWD disabled. Tirerack and other places will shave a new tire to match the existing ones, but not all places can.

[flymore]

Wow 2/32 -3/32 isn't much. This is my first AWD car.

 

Drove 100 miles today, no issues no messages drove great.

 

I'm not seeing in the owners manual where it says how many miles between tire rotations.

 

When I bought the tires they recommended about 6000 miles. I'm way past that and should've been watching it. 

 

This means my front tires are worn as they do most of the stopping.

 

When I get them rotated this would put the new tire up front.

 

So I think I'm ok with a tire rotation. Fingers crossed.

 

Thanks.

 

 

 

[omar302]

4 hours ago, flymore said:

I'm not seeing in the owners manual where it says how many miles between tire rotations.

 

It is in the manual here. With every oil change. So every 10k miles or 1 year, whichever comes first. 

 

[flymore]

Yea, saw that. But when? After how many miles?

 

[flymore]

Ok, after every oil change.

 

Thanks

[1004ron]

12 hours ago, flymore said:

Wow 2/32 -3/32 isn't much. This is my first AWD car.

 

So I think I'm ok with a tire rotation. Fingers crossed.

 

For any difference in wheel diameter/circumference between the left/right wheels on any differential front/rear will have that differential working harder for every mile covered, and the size of that difference will determine how many miles before failure.

 

Tire rotation is important, but has nothing to do with the impact on the differential due to diameter/circumference.

 

The left/right imbalance might be more detrimental on the front as the front wheels are always powered, whereas the rear disengage at cruising speeds.

 

Some tire places will trim a new tire to match the existing three.

 

 

 

Edited 18 hours ago by 1004ron

[Will2U]

Some months back, I ran over something which destroyed my rear driver tire.  I only had about 17,000 miles on the original tires.  I had the service writer confirm with the shop that I only needed one tire.  I was relieved.  I have my tires rotated twice a year with the oil change.

[flymore]

Pretty sure my rear axle doesn't disengage at cruise speeds. That feature was added to 2020 and later AWD models.

 

Starting tomorrow I'll be rotating my tires twice a year with each oil change.

 

 

[1004ron]

13 minutes ago, flymore said:

Pretty sure my rear axle doesn't disengage at cruise speeds. That feature was added to 2020 and later AWD models.

 

The rear drive does disengage on my 2017 Sport and I'd be very surprised if it's changed on the later models.

 

Please add your Model/Year to your profile signature - https://www.fordedgeforum.com/settings/signature/

 

 

[flymore]

2018 Edge Titanium 3.5L AWD

[omar302]

5 hours ago, flymore said:

Pretty sure my rear axle doesn't disengage at cruise speeds. That feature was added to 2020 and later AWD models.

 

Starting tomorrow I'll be rotating my tires twice a year with each oil change.

 

 

 

As @1004ron said, the rear axle does disengage. There is a clutch pack Infront of the RDU unit to disconnect the rear axle from the driveshaft. However, the driveshaft is still driven by the engine/PTU and the rear axle is driven by the wheels. 

 

The 2019 refresh added a "disconnect" function in the PTU that disengages the driveshaft, hence the driveshaft would stop rotating once disconnected from both ends.