WOD GM 14-Bolt Pinion Guard & Truss Tie-In
WA04080
The Wide Open Design GM 14-Bolt Pinion Tie-In with Pinion Guard reinforces and protects one of the most vulnerable areas of a GM 14-Bolt axle. Manufactured by Wide Open Design from 3/8" and 1/4" steel plate, this weld-together kit connects the pinion area to the axle truss, creating a more rigid structure while shielding the yoke, U-joint, and pinion support from rocks, ledges, and trail impacts.
The 3/8" pinion guard is drilled and tapped to simplify installation and service without requiring separate backing nuts. Its contoured design provides clearance for 1350, 1410, and 1480 yokes, making it a strong choice for rock bouncers, crawlers, Ultra4 cars, and heavy-duty trail rigs using a Wide Open Design 14-Bolt truss.
Includes:
- (1) Wide Open Design Pinion Tie-In
- (1) 3/8" Steel Pinion Guard
- (9) Mounting Bolts
Specifications
| Specification | Details |
|---|---|
| Manufacturer | Wide Open Design |
| Product Type | Pinion Guard and Truss Tie-In Kit |
| Axle Application | GM 14-Bolt |
| Tie-In Material | 1/4" Steel Plate |
| Pinion Guard Material | 3/8" Steel Plate |
| Pinion Guard Design | Drilled and Tapped Back Plate |
| Yoke Clearance | 1350, 1410, and 1480 |
| Installation | Weld-Together / Weld-On |
| Primary Truss Compatibility | Wide Open Design GM 14-Bolt Truss |
| Other Truss Compatibility | Possible with Custom Modification |
| Hardware | (9) Bolts Included |
| Country of Origin | Made in the USA |
Fitment
| Application | Compatibility |
|---|---|
| Axle Platform | GM 14-Bolt |
| Primary Truss System | Wide Open Design 14-Bolt Truss |
| Yoke Size | 1350, 1410, or 1480 |
| Vehicle Application | Universal Custom Off-Road Fabrication |
Fitment Notes
- Designed specifically around Wide Open Design GM 14-Bolt truss systems.
- May be adapted to other axle trusses with trimming, fitting, or custom fabrication.
- Provides clearance for 1350, 1410, and 1480 yokes.
- Suitable for front or rear custom 14-Bolt axle builds when truss and driveline clearance allow.
- Welding and final fitting are required.
- Verify pinion angle, driveshaft clearance, suspension travel, and yoke dimensions before final welding.
- Professional fabrication and welding are recommended.
Common Applications
- Rock bouncers
- Rock crawlers
- Ultra4 race vehicles
- Heavy-duty trail rigs
- Custom tube chassis builds
- High-horsepower GM 14-Bolt axle applications
Tech Insight
What does the pinion tie-in do?
The tie-in connects the pinion support area to the axle truss, allowing impact and drivetrain loads to be distributed through a larger portion of the housing instead of being concentrated at the pinion nose.
Why is the pinion area vulnerable off-road?
The yoke, U-joint, and pinion support often sit low and forward on the axle housing, leaving them exposed to rocks, ledges, and hard landings. A direct hit can damage the yoke, driveshaft, pinion bearings, or housing.
What is the benefit of a drilled and tapped guard?
The tapped 3/8" back plate allows the bolts to thread directly into the guard. This eliminates loose nuts behind the assembly, simplifies removal, and makes trail-side or shop service easier.
Will this guard clear a 1480 yoke?
Yes. The guard is designed to provide clearance for 1350, 1410, and 1480 yokes. Final driveshaft angle and operating clearance should still be checked throughout the full suspension cycle.
Why tie the guard into the truss instead of mounting it only near the pinion?
A guard mounted only at the pinion can transfer impact directly into the pinion support. Tying the guard into the truss creates a stronger load path that helps spread impact forces across the reinforced axle structure.
