1. Product Overview
The ReadyLift 66-2015 5-inch Rear Block Kit is designed to safely lift the rear of specific Ford Super Duty trucks. This kit replaces the factory rear blocks, providing additional lift for improved vehicle stance and functionality, particularly beneficial for towing and hauling applications. The blocks are constructed from cast iron and feature an E-coated finish for durability.
1.1 Key Features
- Designed for 2011-2016 Ford F250/F350 Super Duty trucks (single rear wheel 4WD only).
- Provides approximately 3 inches of additional lift for F250 trucks and 1 inch for F350 trucks.
- Constructed from cast iron, OEM-equivalent material.
- Features cast-in center pins and OEM bump stop landings.
- Includes tough E-coated U-bolts and hardware for corrosion resistance.
- Aids in achieving a slight rake for improved weight distribution during towing and hauling.
1.2 Product Specifications
| Specification | Detail |
|---|---|
| Brand | ReadyLift |
| Model Number | 66-2015 |
| Auto Part Position | Rear |
| Material | Cast Iron |
| Maximum Lifting Height | 5 Inches |
| Item Weight | 28.8 pounds |
| Product Dimensions | 6.75 x 19 x 12.5 inches |
| UPC | 804879206552 |
2. Safety Information
Always prioritize safety during installation and operation. It is recommended that installation be performed by a qualified professional. Ensure the vehicle is properly supported and secured before beginning any work. Wear appropriate personal protective equipment, including safety glasses and gloves.
California Proposition 65 Warning: This product may expose you to chemicals known to the State of California to cause cancer and reproductive harm. For more information, visit www.P65Warnings.ca.gov.
3. What's in the Box
The ReadyLift 66-2015 5-inch Rear Block Kit includes the following components:
- Two (2) 5-inch Rear Blocks
- Four (4) E-coated U-bolts
- Eight (8) Nuts
- Eight (8) Washers
4. Setup and Installation
4.1 Before You Begin
Before starting the installation, ensure you have all necessary tools and equipment, including a floor jack, jack stands, wrenches, and a torque wrench. Review the vehicle's service manual for specific torque specifications and procedures related to suspension components. Verify that the kit is compatible with your vehicle model and year (2011-2016 Ford F250/F350 Super Duty, single rear wheel 4WD with 2-pc drive shaft only). Note that U-bolts will not fit F350 dually applications.
4.2 Installation Overview
The installation process involves safely lifting the rear of the vehicle, supporting the axle, removing the existing factory rear blocks, and installing the new ReadyLift 5-inch blocks with the provided U-bolts and hardware. It is crucial to ensure proper alignment of the axle locator pins and to torque all fasteners to the manufacturer's specifications. After installation, a professional alignment is recommended.
For a visual guide on leveling lift kits, which share similar installation principles, please refer to the video below:
5. Operating
After successful installation, the vehicle will exhibit a lifted rear stance. This modification is intended to improve the vehicle's appearance and provide additional clearance, especially when carrying heavy loads or towing. The kit is designed to maintain the factory ride quality while offering enhanced functionality.
5.1 Vehicle Compatibility
This kit is specifically designed for 2011-2016 Ford F250 and F350 Super Duty trucks with a 2-piece drive shaft and single rear wheels. It is not compatible with F350 dually applications or vehicles with factory overload springs, as noted in some user experiences. Always confirm your vehicle's specific configuration before installation.
6. Maintenance
Regular maintenance is crucial for the longevity and safety of your suspension system. After initial installation and approximately 25-50 miles of driving, it is highly recommended to re-torque all U-bolt nuts to the manufacturer's specified values. This ensures that the components remain securely fastened as they settle. Periodically inspect all suspension components for wear, damage, or loose fasteners.
7. Troubleshooting
7.1 U-Bolt Length Issues
In some instances, the provided U-bolts may appear excessively long, making it difficult to achieve proper torque or requiring trimming. If you encounter this, ensure the nuts are tightened as much as possible with available tools, then consider professional assistance for trimming excess thread or using appropriate deep sockets. Verify thread patterns if nuts do not engage correctly; contact ReadyLift customer support if mismatched hardware is suspected.
7.2 Post-Installation Vibrations
If vibrations occur after installation, it may indicate an issue with pinion angle or component alignment. Ensure the blocks are correctly oriented with the built-in pinion angle degree. Re-check all torque specifications and consider having a professional inspect the installation and vehicle alignment to diagnose and resolve the vibration source.
8. Warranty and Support
The ReadyLift 66-2015 5-inch Rear Block Kit is backed by a Lifetime Warranty, as indicated on product diagrams. For specific warranty details, claims, or technical support, please refer to the official ReadyLift website or contact their customer service department directly. It is important to note that the warranty may have specific conditions, such as limitations for off-road use, as mentioned in some product information.
