2009 KK Jeep scalloped driver front tire

[Hec In Omaha]

Howdy All!

I have been a lurker since Feb 2024. There is a lot of great information on this site and looking to hopefully be a contributor too!

I have a 2009 Jeep Liberty KK Rocky Mountain Edition that I purchased in Feb 2024 for my teenage daughter to drive. It is in very nice condition with 126K now on the clock. When I purchased it, it had 121K on it. I purchased it from the original owner who was elderly and had only driven it less than 5K on it since 2018. She had a liver transplant in 2018, and the Liberty was too hard for her to get in and out of after her surgery so it sat in her garage basically unused. Her husband would drive it around occasionally. I also received 18 pages of documented service records performed at the dealer! All the service was done at the dealership. This includes tires! I have since changed out the front and rear diff fluids, transfer case fluid, changed the spark plugs, back flushed the heater core, flushed the cooling system and refilled using Zerex G-05 HOAT coolant, changed the accessory belt and belt tensioner, air filter and 2 oil/filter changes in the 6K miles my daughter has driven it. I ensured all 120k through 126k services needed were done on schedule. Oh yeah, the transmission fluid was replaced when the dealer replaced the transmission pan at 117K. The transmission fluid is clear red! Transmission fluid, front and rear diffs and transfer case fluids were changed at 60K too! It runs like a top and does not use any oil! I also installed an Alpine Head ILX-W670 Head Unit and back up camera and remote start. So, my daughter is all set. So that is the background information on it.

You must be registered for see images attach

So now on to today. I recently noticed a slight vibration at 62 MPH and figured the tires could use balancing. The tires are 2018 and only have 6K miles on them. I took it into a tire shop to investigate the vibration and right away the tech noticed that the driver’s side front tire showed scalloping on the inside tire edge. It is definitely noticeable. He said that is causing the vibration. He also showed me the passenger side front tire which is just beginning to show scalloping as well. He says that I need new front shocks and that is the reason for the scalloping. I had the tires rotated and now the Liberty rides so much smoother and the vibration caused by the scalloped tires are now at the rear. I can imagine how it must ride with all new shocks and tires!

I am planning on installing all the new shocks myself. The ball joints and bushings are all good and were checked by the tire shop.

Here is my parts list:

• Front Right Shock KYB SR4199 – Complete Shock Assembly with spring and mounting plate.
• Front Right Shock KYB SR4200 – Complete Shock Assembly with spring and mounting plate.
• Rear Shocks KYB 344404

I want to retain the factory ride and not interested in lifting the Jeep. My daughter only drives 10 miles to and from High School and does not use it off road. There are certainly a lot of brands when it comes to shocks. I have read reviews, and Monroe seems to have mixed reviews. Do you all have any recommendations when it comes to shock brands? Are there any brands I should stay away from? I figured KYB is a trusted brand.

As always, I appreciate all comments.



Hec

 

[Gyro]

Get an alignment too.

Gyro

 

[KJowner]

The springs will be worn out, it looks like its sitting very low at the front, the new bits should sort it out.

 

[john e denson]

YOU WILL NEED DEEP METRIC SOCKET. i THINK IT IS A 18 MM been awhile

 

[ikuo78]

We rarely have the opportunity to test out several new shocks at the same time, so each new shock feels great.
KYB is a Japanese company that definitely has the top share in the new car installation and aftermarket markets in Japan.

Originally, the recommended replacement cycle for shocks is about 5 years.
After 7 to 8 years, the feeling of replacing it will increase.

I have Monroe front shocks and A-Premium rear shocks, and they are in very good condition.
I've only been driving it for two months since I replaced it.

I think you can get MOOG's lower arm ASSY cheaply in the US, so if you have the budget, it's better to replace it.
The alignment becomes stable.
The rubber bushing is already 15 years old.

 

[john e denson]

2nd thought I THINK IT IS A 24MM

 

[Hec In Omaha]

Thanks everyone for your input. I am now planning on also replacing the following when I do the front shocks:

MOOG RK622148 Front Left Lower Complete Arm w/ Ball Joint
MOOG RK622147 Front Right Lower Complete Arm w/ Ball Joint
MOOG RK621565 Front Right Upper Complete Arm w/ Ball Joint
MOOG RK621564 Front Left Upper Complete Arm w/ Ball Joint
MOOG K750127 Front Sway Bar Links
MOOG ES800412 Front Right Outer Tie Rod
MOOG Front Right Outer Tie End
MOOG ES800413 Front Left Outer Tie End


This way all my bushings and ball joints will be freshened up. Should I also plan on replacing the Clevises?

Thanks in advance!

 

[ikuo78]

Good plan.
As far as alignment is concerned, the steering rack bushings are also generally ruined.
If it's installed the same way as KJ.
The type where the ends of the sleeves are crushed and expanded.
It seems that the oil that drips when replacing the oil element causes it to deteriorate, so even if the mileage is low, it is suspicious if maintenance is frequent.

The clevis is made of steel, so as long as you don't let it rust, it's fine.

 

[Hec In Omaha]

Did some research and have learned that removing the drivers side Upper Control Arm is a P.I.A.! Especially accessing the rear bolt. Any words of wisdom on how to remove the Upper Control arm bolts on a KK?

 

[ikuo78]

My KJ is RHD.
I can access the nut from under the car on the driver's side without removing the steering shaft.
Use a 50mm offset socket and a fine pitch ratchet handle.
I can only turn it about 10 degrees at a time because various things get in the way.
What about LHD KK?