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Old 07-12-2017, 08:02 PM
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Light suspension knock on acceleration

Guys, I have never owned a Jeep Wrangler before. I took a leap of faith on the brand and the model and wasn't sure how I'd fair. I have 650 miles on a 2017 Wrangler Sport and I have been noticing a light knock in the drivers side footwell area after accelerating. It doesn't happen every single time but I'd say at least 80% of the times I accelerate at a moderate effort. Any idea what I should be looking for to resolve the issue or is it just something that comes with being the owner of a Wrangler. I used to own BMWs before switching brands and I used to bring the vehicle in for every single issue I'd have with it, but I know I'm dealing with a less refined model so I'm not sure how to react.

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Old 07-13-2017, 02:35 PM   #2
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Quote:
Originally Posted by tpm17 View Post
Guys, I have never owned a Jeep Wrangler before. I took a leap of faith on the brand and the model and wasn't sure how I'd fair. I have 650 miles on a 2017 Wrangler Sport and I have been noticing a light knock in the drivers side footwell area after accelerating. It doesn't happen every single time but I'd say at least 80% of the times I accelerate at a moderate effort. Any idea what I should be looking for to resolve the issue or is it just something that comes with being the owner of a Wrangler. I used to own BMWs before switching brands and I used to bring the vehicle in for every single issue I'd have with it, but I know I'm dealing with a less refined model so I'm not sure how to react.
Hi tpm17,

Welcome to the Jeep family! If you end up deciding to visit your local dealership for further diagnosis I'd be happy to offer assistance if needed. Just PM our page with your VIN and let me know.

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Old 07-13-2017, 02:51 PM   #3
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Have you checked you control arm torque? Many JK owners replace the control arm bolts with a slightly larger size to virtually eliminate the issue. Regardless, the control arm torque should be 125 lbs on all rear control arm bolts and front lower arms. The upper front arms should be at 75 lbs.
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Old 07-13-2017, 07:51 PM   #4
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My new Wrangler did that... no grease in the ball joints... right from the factory...
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Old 07-13-2017, 08:10 PM
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Thank you for your responses guys! Much appreciated. So I guess I should bring it up on my next service appointment.
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Old 07-13-2017, 09:44 PM   #6
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Also be forewarned, sounds don't always originate from where you think you are hearing them.

650 miles on a brand new vehicle, for sure bring it up at your service appointment.

A few other things that come to my mind.
1) The exhaust crossover is hitting that mini crossmember. Exhaust sounds will usually rear their head on moderate acceleration. Or the exhaust heat shield is banging somewhere. Or an exhaust bolt is loose.
2) Should not even be an issue on a brand new vehicle, but check the front driveshaft as it's not far from that general area. Is it scratched or do you see grease on the underneath, bolts are tight? At 650 miles, should still be pristine other than maybe dirty from road dirt.
3) Other than suspension, make sure the swaybar links are tight and straight.

I do hope they get you straightened out. If the noise gets worse or more frequent or you see/feel it driving any differently, accelerate that appointment.
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Old 08-18-2017, 08:37 AM
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Guys, just a quick update... the people over at Croton Auto Park in Croton on Hudson, NY were great and quickly resolved my knock problem. They lubed a few areas and the noise was completely eliminated. They also checked all the linkages for tightness and all was well.

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