Moog Control Arms: CK, K, or RK?

Moog K, CK, r RK Difference

Moog Stamped Arms

Moog Control Arms: CK, K, or RK?

CK, K or RK? We here at Diverse Suspension Technologies get this question a whole lot. If you are putting parts on your vehicle, you want to know exactly what you are installing. It can be hard to do that with all of these letter designations. So here is all that you need to know to clear up the confusion.


Moog Stamped Arms

CK (K): Moog Problem Solver

Starting with the CK and K. Whether you see a “K” designation or a “CK” designation, you are getting the same part. The CK and K are Moogs Premium line of control arms. Utilizing their “problem solver” technology, these control arms address common factory design issues providing a better than original replacement for your vehicle. The CK and K control arms include ball joints that are powder coated metal with gusher bearings giving them a long life. These ball joints are serviceable and have grease fittings. The CK and K arms also have problem solver bushings and a precise fit and form for easy installation.


Moog Forged Arms

RK: Moog R Series

The RK series is a more value driven part. Because there are so many different vehicles both foreign and domestic, Moog has introduced the R-Series arms to provide replacements for a wide range of vehicles. The RK arms have OE fit and form geometry alignment, with pre-installed OE style bushings and ball joints. However these ball joints are not serviceable like the CK arms. All of the R Series arms have Moog validated construction and design, providing a less expensive alternative.


Moog Stamped Arms

Type and Warranty

Each line of control arms has Forged Steel, Stamped Steel, or Forged Aluminium arms to provide the best style for your specific vehicle. The Premium CK line has a limited lifetime warranty, and the RK has a 3 year warranty that are both handled through our awesome customer service team at DST. Whether you are looking for a “light on the wallet” OE replacement, or a “premium” control arm upgrade, Moog control arms are a great choice for your vehicle.



Comments

    1. Profile photo of Chelsea BakerChelsea Baker

      Hello Edwin! With control arms specifically, Moog offers a limited lifetime warranty for their CK line and a 3 year warranty for their RK line. If you have purchased from us here at DST, just give our awesome customer service team a call (1-888-406-2330). They may ask you a few questions and for some pictures to get a better understanding of the issue. Then once the defective part is on it’s way back to us, we will have Moog send out the replacement part.

      Have you purchased Moog parts before? If so, what has been your experience?

  1. Stephanie

    I am very disappointed with the r series control arms. I am on the second set and needing to get the off my car yet again! They don’t even last more than three months before they are squeaking and need to be swapped out again. Lifetime warranty yea but that doesn’t cover getting them changed every few months because they are a garbage product. Made in China surprise. This time whe I take them off I’m not making the mistake of putting another set on.

    1. Profile photo of Josh DanielsJosh Daniels

      Hey Stephanie,

      Sorry to hear about your experience with those control arms. We know that a squeaky suspension can be super irritating.

      It’s possible that the problem could be environmental instead of with the part itself. Generally, water or other contaminates getting into the bushings is the leading cause for a squeaky control arm and a little lubrication can usually clear that up, but there could be other factors at play. We sell a good deal of Moog parts to a lot of satisfied customers so we like to get to the bottom of any complaints about one of their products.

      If you would like to give our customer support line a call at 1-888-406-2330 and ask for our onsite ASE mechanic maybe we can get some more details and help you cut that awful noise.

      1. Stephanie

        Actually the bushing itself is wearing away. This is only after a few months. The first set I thought maybe was a defective part except both sides were the same. So I get the warranty second set and it’s been maybe four months and here we are again. Same issue. And it’s not installed incorrectly because installer is L1 cert control arms are not rocket science to install.

        I am very disappointed with the r series control arms. I am on the second set and needing to get the off my car yet again! They don’t even last more than three months before they are squeaking and need to be swapped out again. Lifetime warranty yea but that doesn’t cover getting them changed every few months because they are a garbage product. Made in China surprise. This time whe I take them off I’m not making the mistake of putting another set on.

        1. Profile photo of Josh DanielsJosh Daniels

          Hey Stephanie,

          We are right there with you about those rubber bushings. They can provide a smooth ride and provide a barrier between the metal parts on your vehicle but they just don’t last. Polyurethane bushings can provide better handling and should last the life of your vehicle.

          Rubber Vs Polyurethane

          It sounds like you’re putting your vehicle through a lot so you might consider looking at a hardier bushing set. Here is a blog post comparing rubber and polyurethane bushings if you would like some more information. I hope this helps.

          Has anyone tried replacing some worn out rubber bushings with polyurethane? How did it turn out? We would love to hear about it!

Leave A Comment?

About The Author

Profile photo of Drew Taylor