Tuff Country 37702 Rear Ubolt Kit for Use with Blocks - 3" To 4"
Tuff Country
37702
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Tuff Country 37702 Rear Ubolt Kit for Use with Blocks - 3" To 4"
Product Details
Description
The Tuff Country 37702 Rear U-Bolt Kit is a corrosion‑resistant, zinc‑plated set designed for lifted trucks that use block spacers. It provides a reliable, straightforward upgrade to your rear axle when you’re running a 3"–4" lift.
- Includes four u-bolts with hardware: Four zinc‑plated U‑bolts, plus nuts and washers, for a complete rear‑axle installation.
- Designed for 3"–4" block lifts: Specifically sized to secure the rear axle when using 3"–4" lift blocks.
- Premium zinc finish: Zinc plating delivers corrosion resistance in all-weather conditions and road salt environments.
- Solid dimensions: Bolt diameter 9/16" (0.562"), inside diameter 2 9/16" (2.5625"), length 8 5/8" (8.625"), bend type square for secure seating.
- Complete kit for rear suspension: Engineered to replace factory u‑bolts and maintain proper clamping force after a lift.
- Compatibility notes: Fits specific 1969–1972 GMC 4WD models (Blazer, Suburban K1500, and Truck) and 1/2‑ton variants, as outlined in the fitment information.
Upgrading to this kit helps restore axle alignment and clamp integrity after a lift, contributing to consistent ride quality and safer handling. The corrosion‑resistant finish extends the service life of the rear suspension components, while the included hardware simplifies installation for DIY enthusiasts and professional installers alike. This kit is a practical, durable choice for builders upgrading older GM trucks with 3–4 inch blocks.
| Year Range | Make | Model | Drivetrain | Fitment Note |
|---|---|---|---|---|
| 1969–1972 | GMC | Blazer | 4WD | |
| 1969–1972 | GMC | Suburban K1500 | 4WD | Fits 1/2 Ton Models. |
| 1969–1972 | GMC | Truck | 4WD |
Specifications:
FAQs
Please read our FAQs page to find out more.
Will this part fit my vehicle?
Fitment varies by year, make, model, drivetrain, and lift height. Always use the vehicle fitment selector or refer to the fitment notes on the product page before purchasing. If you’re unsure, our team can help confirm compatibility.
Are Tuff Country products street legal?
Most Tuff Country products are designed for on-road and off-road use, but local laws and regulations vary by state and country. It is the customer’s responsibility to ensure compliance with local vehicle regulations after installation.
Is professional installation required?
Professional installation is recommended but not required. Many products can be installed by experienced DIYers with proper tools. However, improper installation can affect ride quality, safety, and warranty coverage.
Will this affect my ride quality?
Tuff Country products are engineered to balance ride comfort, performance, and durability. Ride quality can change depending on lift height, vehicle setup, tire size, and other suspension components.
Are Tuff Country products covered by a warranty?
Yes. Tuff Country products are backed by a manufacturer warranty that covers defects in materials and workmanship. Warranty terms vary by product type and do not cover damage caused by misuse, improper installation, or normal wear.
Can I run larger tires with this product?
Many Tuff Country lift kits and suspension components allow for larger tire sizes, but maximum tire clearance depends on wheel offset, tire width, and vehicle configuration. Refer to the product details or contact support for guidance.
What is the return policy?
Unused, uninstalled products may be eligible for return within the stated return window. Items must be in new condition and returned in original packaging. Shipping costs and restocking fees may apply.
Who can I contact if I have questions?
Our customer support team is available to help with fitment questions, installation guidance, and order support. Reach out before purchasing if you want to ensure you’re selecting the right part for your build.
Free shipping on Orders Over $75
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Selling Suspension Systems for 35+ Years
Tuff Country EZ-Ride Suspension was incorporated over 35 years ago, realizing the desperate need for quality suspension products in the after market world.