Grinding metal-on-metal noise when turning

[Canyonchase1]

Took my 2021 Overland to Firestone today to do basic maintenance, and now, a few hours later, it’s making a grinding noise when turning at low speeds that sounds like metal grinding against metal. Have never heard this before.

Services done were: oil change, tire rotation, and DIF service.

Any ideas what it could possibly be? Could they have messed up the DIF?

Thanks in advance!

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[arosen1997]

Took my 2021 Overland to Firestone today to do basic maintenance, and now, a few hours later, it’s making a grinding noise when turning at low speeds that sounds like metal grinding against metal. Have never heard this before.

Services done were: oil change, tire rotation, and DIF service.

Any ideas what it could possibly be? Could they have messed up the DIF?

Thanks in advance!

Check diff fluid level now!

 

[Canyonchase1]

Check diff fluid level now!

here’s a video showing the noise. Coming from rear of vehicle. Not sure how to check the DIF level but I’ll YouTube it and check it asap. Hoping whatever the issue is isn’t going to cause permanent damage

 

[DylanM]

In addition to checking the fluid level in the axle, you should also check for loose lug nuts on the wheels.

If you have a limited slip differential (LSD) in the rear axle, it's also possible they used the incorrect fluid or didn't use the required additive for the LSD.

 

[arosen1997]

here’s a video showing the noise. Coming from rear of vehicle. Not sure how to check the DIF level but I’ll YouTube it and check it asap. Hoping whatever the issue is isn’t going to cause permanent damage

That does not sound good, hold on I made you a quick video it's processing on YouTube.

 

[arosen1997]

In addition to checking the fluid level in the axle, you should also check for loose lug nuts on the wheels.

If you have a limited slip differential (LSD) in the rear axle, it's also possible they used the incorrect fluid or didn't use the required additive for the LSD.

Also a good point

Here you go Op

 

[Canyonchase1]

Also a good point

Here you go Op

Dude, you're awesome! Thank you so much for making that! Going to check it now. That's the only thing I can think of that would cause that kind of noise from the rear.

 

[Canyonchase1]

In addition to checking the fluid level in the axle, you should also check for loose lug nuts on the wheels.

If you have a limited slip differential (LSD) in the rear axle, it's also possible they used the incorrect fluid or didn't use the required additive for the LSD.

My window sticker says "Trac–Lok® Anti–Spin Rear Differential" which I am assuming is LSD. I don't know much about cars aside from that most have 4 tires and an engine, but I am starting to think I screwed up by having Firestone touch the Dif.

 

[arosen1997]

My window sticker says "Trac–Lok® Anti–Spin Rear Differential" which I am assuming is LSD. I don't know much about cars aside from that most have 4 tires and an engine, but I am starting to think I screwed up by having Firestone touch the Dif.

That is the limited slip differential.
There's a friction modifier that is intended to be added to the oil to make the clutches inside function properly. I'm not 100% sure what the outcome would be forgoing that additive.

 

[Canyonchase1]

Just got back from Firestone. I watched as they inspected the rear dif and saw that it was filled up with the dif fluid. They said that when they initially drained it, there was alot of metal shavings inside, and that since that was my first time changing it, that the dif not having all the metal shavings inside is now causing it to slip.

I don't know much about vehicle maintenance but this sounds like a load of shit to me. If that was the case then nobody would ever change the dif fluid.

Has anyone ever heard of this before?

Everything was perfect before they changed the fluid out.

 

[Silverator]

Check the inside rim of the wheels. I had similar - inside of wheel rubbing against front tie rod end. Since it's only happening on turning - especially if you're going lock to lock like when parking - it's unlikely it's the differential. The tire rotation could have moved a wheel that was a gnats hair from rubbing before into a position that can rub now.

 

[DylanM]

Just got back from Firestone. I watched as they inspected the rear dif and saw that it was filled up with the dif fluid. They said that when they initially drained it, there was alot of metal shavings inside, and that since that was my first time changing it, that the dif not having all the metal shavings inside is now causing it to slip.

I don't know much about vehicle maintenance but this sounds like a load of shit to me. If that was the case then nobody would ever change the dif fluid.

Has anyone ever heard of this before?

Everything was perfect before they changed the fluid out.

Yeah, that's utter BS. The limited slip doesn't rely on wear metals in the fluid to function smoothly.

Did you get them to verify they used an LSD additive or fluid that already contains it in the rear axle? Did you check for loose lug nuts?

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