What's going on in the rear end? - 2014+ Jeep Cherokee Forums
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post #1 of 5 (permalink) Old 03-19-2017, 11:48 PM Thread Starter
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What's going on in the rear end?

I'm not very knowledgeable in automotive technology, but I noticed something about our new High Altitude today and wondered if one of you experts could explain it to me?

This morning before we took our V6 ADI KL to get washed, we decided to back it up to our tent trailer so we could connect the electronical just to make sure the 7 pin harness was working properly. I was standing by the trailer when my wife put the KL in reverse, that's when I noticed the rear end rise up a little, like it was digging in, preparing to pounce. After she backed up to the tent trailer and we tested the connection, I noticed the same thing. Once the KL was put in drive, it appeared to lift up a bit, like the rear axel was locking or something. To me it looked as though this was only happening in the rear, but it could have easily been the entire thing.

I don't think there's anything wrong, just something I noticed. Any ideas?

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post #2 of 5 (permalink) Old 03-20-2017, 12:10 AM
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Originally Posted by Falstaff View Post
.... that's when I noticed the rear end rise up a little, like it was digging in, preparing to pounce. After she backed up to the tent trailer and we tested the connection, I noticed the same thing. Once the KL was put in drive, it appeared to lift up a bit, like the rear axel was locking or something. To me it looked as though this was only happening in the rear, but it could have easily been the entire thing.

I don't think there's anything wrong, just something I noticed. Any ideas?
It has an excellent feature (IMO ) called Auto Park Brake. When the vehicle is put in park it automatically engages the park brake. Great safety feature. Pressing the gas pedal automatically releases the brake, given other conditions are met. There will be a slight delay before the brake releases causing the rise you mentioned. Over time this should lessen to a degree. The owner's manual gives details. Pasted below is some of the info:

If the Auto Park Brake feature is enabled, the parking
brake will automatically engage whenever the transmission
is placed into PARK, or with a manual transmission,
when the ignition switch is turned OFF. If your foot is on
the brake pedal, you may notice a small amount of brake
pedal movement while the parking brake is engaging.
The parking brake will release automatically when the
ignition switch is ON, the transmission is in Drive or
Reverse, the driver seat belt is buckled, and an attempt is
made to drive away.
To release the park brake manually, the ignition switch
must be in the ON/RUN position. Put your foot on the
brake pedal, then push the parking brake switch down
momentarily. You may hear a slight whirring sound from
the back of the car while the parking brake disengages.
You may also notice a small amount of movement in the
brake pedal. Once the parking brake is fully disengaged,
The BRAKE warning lamp in the instrument cluster and
the LED indicator on the switch will extinguish.
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post #3 of 5 (permalink) Old 03-20-2017, 01:05 AM
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Quote:
Originally Posted by Falstaff View Post
I'm not very knowledgeable in automotive technology, but I noticed something about our new High Altitude today and wondered if one of you experts could explain it to me?



This morning before we took our V6 ADI KL to get washed, we decided to back it up to our tent trailer so we could connect the electronical just to make sure the 7 pin harness was working properly. I was standing by the trailer when my wife put the KL in reverse, that's when I noticed the rear end rise up a little, like it was digging in, preparing to pounce. After she backed up to the tent trailer and we tested the connection, I noticed the same thing. Once the KL was put in drive, it appeared to lift up a bit, like the rear axel was locking or something. To me it looked as though this was only happening in the rear, but it could have easily been the entire thing.



I don't think there's anything wrong, just something I noticed. Any ideas?


I believe it's the parking brake. If you are hooking up a trailer and have the door open while doing so or have your seatbelt taken off you'll need to manually disengage the parking brake.


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post #4 of 5 (permalink) Old 03-20-2017, 09:06 AM
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Quote:
Originally Posted by Falstaff View Post
I'm not very knowledgeable in automotive technology, but I noticed something about our new High Altitude today and wondered if one of you experts could explain it to me?

This morning before we took our V6 ADI KL to get washed, we decided to back it up to our tent trailer so we could connect the electronical just to make sure the 7 pin harness was working properly. I was standing by the trailer when my wife put the KL in reverse, that's when I noticed the rear end rise up a little, like it was digging in, preparing to pounce. After she backed up to the tent trailer and we tested the connection, I noticed the same thing. Once the KL was put in drive, it appeared to lift up a bit, like the rear axel was locking or something. To me it looked as though this was only happening in the rear, but it could have easily been the entire thing.

I don't think there's anything wrong, just something I noticed. Any ideas?
X3
The parking brake is set in auto (in the settings menu) to set itself when ever in park.
I keep mine on manual because of exactly what you experienced.
I find the auto release does not work easily all the time. At times it releases only after a lot of pressure on it, with a clunk.
But I do like it in manual because if I "forget" to release it it will still release itself.
Nothing was worse than in the old days than actually driving with the emergency brake set partially.
The Cherokee sets so strong you are not going anywhere without releasing it.

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post #5 of 5 (permalink) Old 03-20-2017, 09:56 AM Thread Starter
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Thanks for the explanations, gentlemen. I figured it was something like that. Now I know... And knowing is half the battle!

2017 High Altitude Firecracker Red 4x4 with 3.2L V6 & ADI. Tow, Luxury, Safety & Technology Groups. 9 speaker audio & CommandView sunroof.
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