1. Introducción
This instruction manual provides essential information for the proper installation, operation, and maintenance of your maXpeedingrods Front Lower Control Arm with Ball Joint and Poly Bushing. Please read this manual thoroughly before attempting any installation or service to ensure safety and optimal performance. This product is designed to replace original equipment front lower control arms in specific vehicle models.

Imagen 1.1: Másview of the maXpeedingrods Front Lower Control Arms.
2. Información de seguridad
- Instalación profesional recomendada: Installation of suspension components requires specialized tools and knowledge. It is highly recommended that installation be performed by a qualified automotive technician.
- Soporte de vehículos: Always use appropriate jack stands or a vehicle lift to securely support the vehicle when working underneath it. Never rely solely on a jack.
- Equipo de protección personal: Wear safety glasses, gloves, and other appropriate personal protective equipment during installation.
- Especificaciones de par: Siga estrictamente las especificaciones de torque del fabricante del vehículo para todos los sujetadores. Un torque inadecuado puede provocar fallas en los componentes.
- Alineación de ruedas: After replacing any suspension components, a professional wheel alignment is mandatory to ensure proper vehicle handling and tire wear.
3. Contenido del paquete
Verifique que todos los componentes estén presentes y sin daños antes de comenzar la instalación.
- 1x Front Left Driver Side Lower Control Arm (Part Number: K620381)
- 1x Front Right Passenger Side Lower Control Arm (Part Number: K620380)

Image 3.1: Contents of the maXpeedingrods Front Lower Control Arm package.
4. Vehicle Compatibility (Fitment)
These control arms are compatible with the following 4WD/AWD vehicles with Front Torsion Bar Suspension:
- Cadillac:
- Escalada: 2002-2006
- Escalade ESV: 2003-2006
- Escalade EXT: 2002-2006
- Chevrolet/Chevy:
- Silverado 1500: 1999-2003 (4WD & AWD), 2004-2006
- Tahoe: 2000 (4.8 L & 5.3 L; Fit Front Torsion Bar Suspension), 2001-2006
- Avalanche 1500: 2002-2006
- Suburban 1500: 2000-2006
- Express 1500: 2003-2005 (AWD; Fit Front Torsion Bar Suspension)
- Express 2500: 2003-2005 (AWD; Fit Front Torsion Bar Suspension)
- GMC:
- Sierra 1500: 1999-2003 (4WD), 2004-2006
- Yukon: 2000-2006 (2000: 4.8 L & 5.3 L V8 Engines)
- Yukon XL 1500: 2000-2006
- Savana 1500: 2003-2014 (AWD, with Front Torsion Bar Suspension)
- Savana 2500: 2003-2005 (AWD, with Front Torsion Bar Suspension)
5. Características del producto
- Material duradero: Constructed from high-strength carbon steel with an anti-corrosion surface treatment for enhanced longevity and resistance to environmental factors.
- Upgraded Poly Bushings: Pre-installed polyurethane bushings are firmer and more durable than standard rubber bushings. They contribute to reduced road noise and vibration, offering a smoother and more stable driving experience.
- Direct Bolt-On Replacement: Engineered for a precise fit, allowing for direct replacement of the original equipment control arms without modifications.

Image 5.1: Illustration of the durable material and anti-corrosion surface.

Image 5.2: Detail of the poly bushings and ball joint for improved handling.

Image 5.3: Diagram illustrating the direct bolt-on replacement design.
6. When to Replace Suspension Parts
Signs that your vehicle's suspension components, such as control arms, may need replacement include:
- Ruido metálico: A noticeable 'thump' or clunking sound when driving over bumps or uneven surfaces.
- Dirección Wander: The vehicle tends to drift or pull to one side, requiring constant steering correction.
- Desgaste desigual de los neumáticos: Abnormal or severe wear patterns on tires, such as feathering or cupping.
- Vibración excesiva: Unusually strong vibrations felt through the steering wheel or floorboards.

Image 6.1: Visual indicators for suspension component replacement.
7. Guía de instalación (Configuración)
Descargo de responsabilidad: This is a general guide. Always refer to your vehicle's specific service manual for detailed, model-specific instructions and torque specifications. Professional installation is strongly recommended.
- Prepare el vehículo: Estacione el vehículo en una superficie nivelada, ponga el freno de estacionamiento y bloquee las ruedas traseras. Afloje las tuercas de las ruedas delanteras.
- Levantar y asegurar: Safely lift the front of the vehicle using a hydraulic jack and support it securely with jack stands. Remove the front wheels.
- Remove Old Control Arm:
- Locate the front lower control arm.
- Remove the cotter pin and castle nut from the ball joint stud.
- Use a ball joint separator tool to disconnect the ball joint from the steering knuckle.
- Remove the bolts securing the control arm to the vehicle frame. Note the orientation of all components.
- Carefully remove the old control arm.
- Install New Control Arm:
- Position the new maXpeedingrods control arm into place.
- Insert the frame bolts and hand-tighten them. Do not fully tighten at this stage.
- Connect the new ball joint to the steering knuckle. Install the castle nut and tighten it to the manufacturer's specified torque. Install a new cotter pin.
- With the vehicle's weight on the suspension (or simulated by jacking up the lower control arm), tighten the frame bolts to the manufacturer's specified torque. This prevents premature bushing wear.
- Volver a montar: Reinstall the front wheels and tighten lug nuts. Lower the vehicle safely.
- Pasos finales: After installation, it is crucial to have a professional wheel alignment performed to ensure correct steering geometry and prevent uneven tire wear.
8. Operación (Post-Instalación)
After successful installation and a professional wheel alignment, you should experience improved vehicle handling, reduced suspension noise, and enhanced stability. The polyurethane bushings contribute to a more direct and responsive feel compared to worn or standard rubber bushings.
9. Mantenimiento
To ensure the longevity and performance of your maXpeedingrods control arms:
- Inspección regular: Periodically inspect the control arms, ball joints, and bushings for any signs of wear, damage, or looseness. Check for cracks in the bushings or torn ball joint boots.
- Limpieza: Keep the suspension components clean from excessive dirt, salt, and debris, which can accelerate wear.
- Lubricación: If the ball joints are serviceable (have grease fittings), lubricate them according to your vehicle manufacturer's recommendations or at regular service intervals.
10. Solución de problemas
| Síntoma | Posible causa | Solución |
|---|---|---|
| New clunking or rattling noise after installation | Loose fasteners, improper torque, or interference with other components. | Re-check all fasteners for proper torque. Inspect for any contact between suspension components. |
| Vehicle pulls to one side or steering feels off | Alineación incorrecta de las ruedas. | Ensure a professional wheel alignment has been performed after installation. |
| Premature bushing wear | Bushing bolts tightened with suspension unloaded. | Ensure bushing bolts are tightened only when the vehicle's weight is on the suspension. Replace bushings if necessary. |
| Vibración excesiva | Unbalanced wheels, worn tires, or other unrelated suspension issues. | Check tire balance and condition. Consult a mechanic for further diagnosis. |
11. Especificaciones
- Marca: varillas de velocidad máxima
- Número de modelo: PL36HI
- Peso del artículo: 63.5 pounds (approximate, for the pair)
- Dimensiones del producto: 22.05 x 21.26 x 8.27 pulgadas (dimensiones del embalaje)
- Material: Acero al carbono de alta resistencia
- Bushing Type: Poliuretano
12. Garantía y soporte
maXpeedingrods offers comprehensive customer support and warranty coverage for this product:
- Garantía: 1-year limited warranty for quality-related issues from the date of purchase.
- Apoyo técnico: Soporte técnico de por vida disponible.
- Contacto: For any questions or assistance, please contact maXpeedingrods customer support. Refer to your purchase documentation for specific contact details.

Image 12.1: maXpeedingrods commitment to customer support.





