moog-rk640398 | Front Lower Control Arm | 1994-1999 Dodge Ram 1500

  • moog-rk640398 Front Lower Control Arm
  • moog-rk640398 Front Lower Control Arm

Front Lower Control Arm

Manufacturer: MOOG
Part Number: moog-rk640398
Price: $48.22

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Suggested part for moog-rk640398: moog-rk620480
moog-rk620480 Front Lower Control Arm And Ball Joint - Driver Side
Replace your control arm with Moog's value-driven front left lower control arm with pre-installed OE style bushings and ball joint.

Suggested part for moog-rk640398: moog-rk620481
moog-rk620481 Front Lower Control Arm And Ball Joint - Passenger Side
Replace your control arm with Moog's value-driven front right lower control arm with pre-installed OE style bushings and ball joint.

  • Moog fulfills their warranty through their individual dealers. That means that in order to receive warranty support, you will have to refer back to the original dealer you purchased the part from. Be sure to check the dealer's warranty support before you buy the part to make sure that they will properly support the warranty. If a dealer will only refer you back to the manufacturer in order to receive warranty support, then you may not actually have any warranty at all.


    Moog Premium Steering Components carry a Limited Lifetime Warranty. Moog R-Series Control Arms, Hub Assemblies, and Strut Assemblies carry a 3 Year Warranty.

    Moog warranties their parts to be free of defects in materials and/or workmanship during these timeframes as measured from the date of purchase.

    If a Moog part should fail due to materials or manufacturing defect while under warranty, we will provide a replacement of the part upon return of the defective part.

FitmentFront Lower Control Arm moog-rk640398 fits these vehicles:

moog-rk640398 | Front Lower Control Arm | 1994-1999 Dodge Ram 1500

Fits 4WD models ONLY

1994-1999 Dodge Ram 2500
  • Fits Dana 44 Axle
  • For the Dana 60 Axle use rk641889

What is the Difference Between Moog R Series and CK Control Arms?

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.

Short Answer: R Series is a value-driven replacement part while the CK Series incorporates Moog's premium Problem Solver components for a better than OE upgrade.

Moog Stamped Arms
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 the original replacement for your vehicle. Most CK and K control arms include ball joints that are powder coated metal with gusher bearings giving them a long life. Many of 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.

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 most include the 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 Forged Arms
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.

question_answer Customer Questions and Answers

Will RK640398 fit dana 60 front axle.
RK640398 will fit the Dana 44 axle. For the Dana 60 axle you will need RK641889.

I have a dana 60 front axle and 8800lbs gvw, is this the right part for my truck.
RK640398 is for the Dana 44, The RK641889 is the control arm for the Dana 60 front axle.