Drivetrain Slack - Jeep Renegade Forum
 
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post #1 of 7 (permalink) Old 01-11-2017, 09:14 AM Thread Starter
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Drivetrain Slack

I live on a street with a steep hill and back out of the driveway up the hill. When I shift in to drive and take off there is a huge clunk in the drivetrain, almost as if there is a lot of slack being taken up. I have never noticed this on a more level surface, which surprises me because I would think there would still be some amount of slack to be taken up if that were the case. Has anyone else experienced this and or can shed some light on what is going on? Does anyone think this could damage the vehicle and warrants a visit to the dealer?
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post #2 of 7 (permalink) Old 01-11-2017, 01:55 PM
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What exactly are you doing? Backing out of your more or less level driveway and cutting it left or right to be backing up a hill, then driving away down hill?

It's not clear, and yes, in an AWD system that permits uneven splits front to rear with an automatic transmission, you can get a clunk from slack being taken up in the drive line, but you can also have it for bad reasons that shouldn't be happening.

Also, what's your build date?


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post #3 of 7 (permalink) Old 01-11-2017, 02:39 PM
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Are you coming to a COMPLETE STOP before switching from reverse to drive?
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post #4 of 7 (permalink) Old 01-12-2017, 10:12 AM Thread Starter
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To clarify, I am backing out of a relatively flat driveway and cutting the wheel to the right to go uphill. Shift into D after coming to a complete stop. When I let off the brake the vehicle drifts forward a few inches (feels like maybe 4-6) and I hear a clunk sound before I have the chance to accelerate. I reminds of the same sound when parking on a hill (front end downhill) and not setting the E-brake before shifting in to park and letting off the brake.

Not sure of the exact build date but it was in march of 2016.
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post #5 of 7 (permalink) Old 01-12-2017, 10:14 AM Thread Starter
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Yes.
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post #6 of 7 (permalink) Old 01-12-2017, 12:53 PM
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Quote:
Originally Posted by C'ville Renegade View Post
I live on a street with a steep hill and back out of the driveway up the hill. When I shift in to drive and take off there is a huge clunk in the drivetrain, almost as if there is a lot of slack being taken up. I have never noticed this on a more level surface, which surprises me because I would think there would still be some amount of slack to be taken up if that were the case. Has anyone else experienced this and or can shed some light on what is going on? Does anyone think this could damage the vehicle and warrants a visit to the dealer?
Hi C'ville Renegade,

If you decide to visit your local dealership for further diagnosis I'd be happy to follow up with them for you if needed. Just PM our page with your VIN and let me know!

Andrea
Jeep Social Care Specialist
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post #7 of 7 (permalink) Old 01-12-2017, 04:49 PM
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Hmmm. Can you actually feel it engage 1st before letting off the brake though? A lot of FCA vehicles have a notable delay. If you shift from R to D then immediately punch the gas it jerks as the transmission grabs 1st. If you wait a second or two in D with your foot on the brake before going forward does it still clunk? Another thing for the dealer to check is the front control arm bushings. There have been some reports of them being replaced under warranty.
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