Powerflex Rear Sub Frame Mounting Kit - PFR63-120
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Full details
This Powerflex Rear Sub Frame Mounting Kit (PFR63-120) is designed for vehicle owners experiencing issues like imprecise handling, uneven tyre wear, and braking instability due to soft or failing suspension bushes. It offers improved performance, increased safety, and prolonged tyre life by replacing worn rubber components with durable polyurethane. A potential caveat is that the increased stiffness may transmit more road noise and vibration into the cabin for some users.
All features
| Model Part Number | PFR63-120 |
|---|---|
| Brand | Powerflex |
Extended Product Information
FAQs
What are suspension bushes and why do they fail?
Suspension bushes are rubber or polyurethane components that isolate suspension parts, absorb vibration, and allow for controlled movement. They fail over time due to age, stress, and exposure to elements, leading to imprecise handling and wear.
How long do Powerflex bushes typically last?
Powerflex polyurethane bushes are significantly more durable than standard rubber bushes and are designed to last the lifetime of the vehicle under normal operating conditions.
Will installing these bushes make my ride too harsh?
While polyurethane offers a firmer ride than stock rubber, the primary goal is to restore lost performance and handling. The level of harshness perceived can vary depending on the specific application and driver sensitivity. Some vibration may be transmitted, which is a trade-off for improved control.
Do I need to replace my tyres after installing these?
Not necessarily. The Powerflex bushes are designed to *prevent* uneven tyre wear by correcting suspension geometry issues caused by worn original bushes. If you already have uneven wear, you may need new tyres, but the bushes will help prevent it going forward.
Can I install these myself?
Installation requires mechanical knowledge and typically some specialized tools for pressing out old bushes and pressing in new ones. If you are not experienced with suspension work, it is recommended to have them installed by a professional mechanic.
What is the difference between rubber and polyurethane bushes?
Rubber is softer and provides better vibration isolation but degrades over time and allows for more suspension flex. Polyurethane is much stiffer, more durable, and offers less flex, resulting in improved performance and handling at the cost of some comfort.
Troubleshooting
Clunking noise from rear suspension
Ensure the bushes are fully seated and the mounting hardware is torqued to the manufacturer's specifications. Check for any foreign debris trapped during installation.
Uneven tyre wear persists
While Powerflex bushes help, check wheel alignment as this is a separate but crucial factor for tyre wear. Ensure no other suspension components are worn or damaged.
Vibration or harshness felt in the cabin
This can be a characteristic of stiffer suspension components. Ensure the correct parts were installed and torqued correctly. Consider if the vehicle is being used for intended purpose where this is acceptable.
Pros and Cons
Pros
- Significantly improves steering response and cornering stability.
- Reduces uneven tyre wear, saving money on replacements.
- Enhances overall vehicle safety during braking and high-speed driving.
- Offers a long-term, cost-effective upgrade over standard rubber bushes.
- Direct replacement for worn or degraded original bushes.
Cons
- May introduce more road noise and vibration into the cabin.
- Requires mechanical aptitude for proper installation.
- Stiffer ride quality may not be preferred by all drivers.
- Potential for squeaking if not lubricated correctly during installation.
Setup, Compatibility & Care
Setup: Installation involves removing the original rubber sub frame mounting bushes and pressing in the new Powerflex polyurethane units. It is recommended to consult a workshop manual for the specific vehicle model for detailed removal and installation procedures. Ensure surfaces are clean before fitting.
Compatibility: This kit (PFR63-120) is designed for specific vehicle models. Always verify compatibility with your vehicle's make, model, and year before purchase using the manufacturer's application guide.
Care: Polyurethane is a low-maintenance material. Periodically inspect the bushes for any signs of damage or excessive wear. Clean with mild soap and water. Avoid using petroleum-based solvents or degreasers, as these can degrade the material. Ensure the metal mounting hardware is kept clean and free from corrosion. A silicone-based lubricant may be used on the polyurethane contact surfaces during installation to prevent noise.