KK parking brake survey - JeepForum.com
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post #1 of 17 Old 06-03-2020, 01:59 PM Thread Starter
Fourspeedman
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KK parking brake survey

I am working on a 2012 KK parking brake. It has never worked properly so I have no baseline to compare it to. I would appreciate it if any KK owners would advise me as to how well the properly functioning parking brake actually holds. As it stands right now the brake will hold the vehicle so-so on a level surface. But if I put it in gear with the engine running it just takes off- no braking. Is this normal? Should it hold the vehicle against the engine? If it can't hold against the engine what about on a really steep hill? Please advise, thanks in advance.


Mark in Queens- Home of Spiderman and the Ramones
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post #2 of 17 Old 06-03-2020, 02:05 PM
pshivers
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My 08 won't hold anything. I remember reading someone flipping a part under the center console. I've tried to adjust the shoes to no avail.

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post #3 of 17 Old 06-03-2020, 03:07 PM Thread Starter
Fourspeedman
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I am the one who posted this. I did everything and then some to get it tight enough to hold against the engine but it won't. https://www.jeepforum.com/forum/f292...rings-4398889/

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post #4 of 17 Old 06-04-2020, 09:58 AM
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Quote:
Originally Posted by Fourspeedman View Post
I would appreciate it if any KK owners would advise me as to how well the properly functioning parking brake actually holds.
The JK & KK parking brakes were only meant to work at the time of initial sale. When they were brand new they worked as they should. When my KK's maxcare was about to expire I had the parking brake fixed by the dealership, so it then worked as it should for a short time, and quickly reverted to useless.

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2016 MK- Murchison springs, ~1" BL, skinny 30s
2011 KK- H&R lift springs, OldManEmu shocks/struts, skinny 31s
2009 Sorento- H&R springs, ToyTec strut spacers, OldManEmu shocks/struts, 31s
2006 TJ budget LCG prerunner- see profile
2006 Trailblazer- EXT lift, Nth LJ 4.5" springs + Monroe rear coilovers, skinny 32s
1998 Durango- SuspMax & Roadmaster lifts, rear Truetrac, skinny 32s
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post #5 of 17 Old 06-04-2020, 12:16 PM Thread Starter
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Quote:
Originally Posted by Pine_Cat View Post
quickly reverted to useless.
Wow, Pine_Cat, thanks for the firsthand experience. Maybe I am expecting too much out of this thing. I am used to drum rear brakes with the integral parking brake. If I forget to release it I will stall my engine taking off. I used to have a 1977 Trans Am and I swapped a '79 disc brake rear into that. The parking brake was a mechanical ratchet that extended the caliper piston. It worked pretty good, but not as good as a regular drum parking brake. So if the stealership managed to get it working so should we. I must be missing something but I am going to stay at it.

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post #6 of 17 Old 06-04-2020, 09:33 PM
lfhoward
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I would agree with PineCat. The parking brake used to hold the Jeep against the engine and keep it immobile on hills, but it hasn’t been that way since maybe 2014. Probably earlier. (I have an 08.)

I have tried adjusting it in the past to no avail. I’ve had several mechanics try to do the same also. It has never worked as well as when it was new, and whatever gains were made with each adjustment disappeared within a few months.

I’m tempted to try again since I am home a lot because of the Covid-19 social distancing. But I have been building and planting a garden in my free time instead of wrenching on the Jeep lately.

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post #7 of 17 Old 06-05-2020, 03:34 PM
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If it's any consolation, my Trailblazer also has this issue, so Daimler-Chrysler was not the only offender. Some DIYers in youtube have improvised a fix, so it's too bad the company didn't make this a TSB.

2017 JK
2016 MK- Murchison springs, ~1" BL, skinny 30s
2011 KK- H&R lift springs, OldManEmu shocks/struts, skinny 31s
2009 Sorento- H&R springs, ToyTec strut spacers, OldManEmu shocks/struts, 31s
2006 TJ budget LCG prerunner- see profile
2006 Trailblazer- EXT lift, Nth LJ 4.5" springs + Monroe rear coilovers, skinny 32s
1998 Durango- SuspMax & Roadmaster lifts, rear Truetrac, skinny 32s
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post #8 of 17 Old 06-05-2020, 04:44 PM Thread Starter
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Quote:
Originally Posted by Pine_Cat View Post
it's too bad the company didn't make this a TSB.
You mean the same company that produced the infamous 0331 head? If you don't know, Daimler re-designed the 4.0 straight six head for 2000. It tended to crack between the number three and four exhaust valves because the casting was weakened for emissions purposes. Warranty claims went through the roof for the 2000- 2001 model years. By 2002 they re-re-designed the head to the much stronger "TUPY" head. But they never admitted the failure nor offered any compensation or even a fix for the bad heads. I myself had to get a new Chinese cast head and re-build the short block on our 01' Cherokee. No, they will never admit error.

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post #9 of 17 Old 06-06-2020, 02:48 PM
lfhoward
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... too bad the company didn't make this a TSB.
Actually it was... but only for the KK’s with a manual transmission, which were only built for the 08 model year. Even though the defective part is exactly the same, the company figured it was less important to fix on an automatic transmission vehicle since the pawl would usually hold the vehicle immobile when in Park.

Here is a PDF of the TSB.
http://download1502.mediafire.com/kq...Recall+H28.pdf

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post #10 of 17 Old 06-06-2020, 03:31 PM
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Garage
home depot, lowes and true-value hardware stores carry a line of parking brakes. they're in the garden department.
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post #11 of 17 Old 06-07-2020, 08:43 AM Thread Starter
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Here's what gets me. The rotors, shoes, and hardware are all new. What could the stearlership do that I haven't? Except adjust the shoes right up tight to the rotors.

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post #12 of 17 Old 06-07-2020, 09:11 PM
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Originally Posted by Golden-Arm View Post
home depot, lowes and true-value hardware stores carry a line of parking brakes. they're in the garden department. [IMG class=inlineimg]/forum/images/JeepForum_2016/smilies/tango_face_devil.png[/IMG]
Name the movie:
“I gotta go get my tool.”
“That ain’t no tool! That’s a damn brick!

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post #13 of 17 Old 06-12-2020, 10:41 AM Thread Starter
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So I figured it out. When the parking brake is adjuasted up to where it actually works- then it wears out fast and it needs adjusting again. This is because the actuator does not have enough travel to expand the shoes very far. Thus the shoes cannot be left where they don't drag at all. I left mine with just a slight drag and they work OK. That sucks because if the shoes did not drag they would last forever since they are only used when parked. Bad design, very bad.

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post #14 of 17 Old 06-12-2020, 09:07 PM
hersheleller40
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Seems like drag equals heat. That could cause other troubles. I had a front break dragging on an explorer sport trac. It heated up an caused the wheel bearings to fail. I wound up replacing bearings calipers and rotors.


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post #15 of 17 Old 06-12-2020, 09:11 PM
Rob K
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Thanks for figuring that out. I'm likely to get to mine this winter. Hopefully can figure out a mod that will allow for more travel.
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