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The first generation of the Chevrolet Equinox, a crossover SUV from Chevrolet based on General Motors' Theta platform.

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Rear end differential and axle

I'm having problems with our 2007 AWD Equinox which has 131,000 miles on it. It's in really good shape. We've replaced both front hubs twice. Last week my wife said she can feel a vibration when she accelerates. Had the tires rotated and spun balanced, still a vibration especially when going from a stop to 30 MPH. No vibration in the steering wheel or the gear shift lever. The seats vibrate, that's how bad it is. I'm afraid to take it to my dealer because it will cost me a diagnostic fee. I rocked the car back and forth in park and think the noise is from the differential or the axle? My local mechanic that I use for brakes etc. said they could look at it but it will probably be expensive! Does anyone have an idea?

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After checking with a mechanic at work, I took it over to my local mechanic who did some research. Bill and Paul rocked the car back and forth after a drive which they could feel the vibration. They removed the carrier bearing and found that they need to replace the entire driveshaft, carrier bearing assembly. They gave me a price of $983. In the past, I’ve bought the parts and they install them. I bought a Dorman OE Solutions part # 946-035 with a lifetime warranty for $522.67 and my mechanics installed for $200. I saved roughly $260.

Thanks for all your suggestions guys!

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Do you have jack stands? Find a nice level parking spot. Put front bumper against a tree, wall, or any un-movable thing. Jack the rear wheels off the ground, and put the stands under the axle. Remove the jack.

Try rocking the wheel, that noise is old worn universal joints on each end of the large metal drive shaft. Closely examine the tires.

Switch to 2WD ONLY. Start the engine, put it in drive.

Be careful. Don't do anything stupid.

At idle, the rear wheels will slowly rotate, and the driveshaft may make noise. If you lightly 'drag' the brake, adding a little resistance, the U-joint might get louder. How's the vibration ? Let off the brake.

Slowly, motor up to what ever speed causes the vibration.

Bent driveshaft, $250. Bend wheel rim, $100. Out-of-round-tire, $125.

Find a driveshaft-speciality shop, not your local mechanic.

The rim/tire issue is best tested using your spare.

If the driveshaft is bent, or a tire has broken cords, I suspect it has been off-road-racing, or maybe, jumping a parking-lot-curb.

At 131,000 miles, Ur-joints will get loose, too !

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Looking online there are a few TSB's from Chev about faulty rear suspension units, on your vehicle. Check the tyres for out of round. They don't check that when rotating and balancing. Question, was it doing this before you rotated the tyres and if so, was it still noticeable at the rear?

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Tom has given you an excellent answer with many good ideas One thing he did fail to mention is the viscous coupler . You mentioned it was an AWD and one of the week points in the system is the carrier bearing in the back of the coupler .This is a inexpensive bearing but you will need someone to take the coupler apart to replace it as the dealer and most shops will want to replace the whole unite which is extremely expensive. The viscous coupler can be replaced in under an hour but the unit can run close to $2000 . If you can find someone to replace the bearing there will be another hour of labor but the bearing will probably only be 30-40 bucks. Just something to look at . Hope this helps

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If you're in the states, I believe Autozone does scans for free.

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@trett43 vibration on acceleration at low speed can be caused by a worn center support bearing. Check that while you check the u-joints as well. check on here https://www.youtube.com/watch?v=N7ESPv4p... for more information

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I usually reserve downvotes for blatantly wrong or malicious answers but whatever ;-) I do appreciate the downvote. ;-)

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