Yukon GM 14-Bolt Chromoly Full Float Axle Shaft - 30-Spline, Cut-to-Fit 31–35"
YA WGM14T-30-35
The Yukon GM 14-Bolt 30-Spline 4340 Chromoly Full Float Rear Axle Shaft is built for heavy-duty axle assemblies that need more strength than a standard replacement shaft. Made from high-strength 4340 chromoly steel, this axle shaft is designed to handle the torque and shock loads created by larger tires, locking differentials, high-horsepower engines, and demanding off-road use. Its cut-to-length design makes it a practical choice for custom GM 14-Bolt axle builds, narrowed housings, and fabricated rear axles where factory shaft lengths won't work.
Yukon uses cold roll-formed splines and induction heat treatment to improve spline durability and resistance to fatigue under load. The 30-spline configuration is designed for compatible GM 10.5" and 11.5" full-float axle applications, while the 31"–35" cut-to-length range gives builders flexibility when setting final axle width. Whether you're putting together a rock crawler, trail buggy, Ultra4-style build, or heavy-duty truck, the important part is matching the finished shaft length, spline engagement, and wheel-end configuration to the complete axle assembly.
Includes:
- (1) Yukon GM 14-Bolt 4340 Chromoly Full Float Rear Axle Shaft
- 30-Spline Cut-to-Length Configuration
- 31"–35" Length Range
Important: Sold individually. This axle shaft requires measurement and cutting to the correct finished length for the intended axle assembly. Verify differential spline count, wheel-end flange pattern, axle housing width, and final shaft length before ordering. Axle shafts must be matched to the complete axle configuration.
Specifications
| Manufacturer | Yukon Gear & Axle |
|---|---|
| Part Number | YA WGM14T-30-35 |
| Product Type | Full Float Rear Axle Shaft |
| Axle Platform | GM 10.5" / 11.5" Full Float |
| Axle Shaft Material | 4340 Chromoly Steel |
| Axle Spline Count | 30-Spline |
| Axle Shaft Length | 31"–35" Cut-to-Length |
| Axle Shaft Design | Full Float / Custom Length |
| Spline Manufacturing | Cold Roll-Formed |
| Heat Treatment | Induction Heat Treated |
| Axle Flange Bolt Pattern | 8 x 3.562" |
| Differential Compatibility | 30-Spline GM Full Float Applications |
| Axle Position | Rear |
| Installation Type | Cut-to-Length / Axle Assembly Required |
| Primary Application | Custom GM 14-Bolt Axles, Rock Crawlers, Trail Buggies & Heavy-Duty Off-Road Builds |
| Quantity | Sold Individually |
Fitment
Designed for compatible GM 10.5" and 11.5" full-float rear axle assemblies using 30-spline differential configurations. The vehicle applications below are reference platforms only. This cut-to-length shaft is not a guaranteed direct-fit replacement for factory axle shafts.
| Make | Model | Year Range | Axle Application |
|---|---|---|---|
| Chevrolet | K30 1-Ton 4x4 | 1973–1991 | GM 10.5" 14-Bolt Full Float Rear |
| Chevrolet | V30 1-Ton 4x4 | 1987–1991 | GM 10.5" 14-Bolt Full Float Rear |
| GMC | K3500 1-Ton 4x4 | 1973–1991 | GM 10.5" 14-Bolt Full Float Rear |
| GMC | V3500 1-Ton 4x4 | 1987–1991 | GM 10.5" 14-Bolt Full Float Rear |
| Chevrolet | Silverado 2500HD / 3500HD 4x4 | 2001–Current | GM 11.5" Full Float Rear, Verify Configuration |
| GMC | Sierra 2500HD / 3500HD 4x4 | 2001–Current | GM 11.5" Full Float Rear, Verify Configuration |
| Custom Fabrication | Tube Chassis / Off-Road Builds | Universal | Compatible GM 10.5" / 11.5" Full Float Rear |
Fitment Notes:
- Designed for compatible GM 10.5" and 11.5" full-float rear axle applications
- Requires a matching 30-spline differential or spool
- Cut-to-length design supports finished shaft requirements within the specified 31"–35" range
- Verify axle shaft length before cutting
- Confirm 8 x 3.562" axle flange bolt pattern
- Verify axle housing width, differential position, spline engagement, and wheel-end configuration
- Not intended for 35-spline, 38-spline, or 40-spline differential configurations
- Factory axle applications may use different shaft lengths, flange patterns, or spline configurations
- Professional measurement and machining are recommended
Builder Note: For custom or narrowed GM 14-Bolt axle builds, measure the required axle shaft length after the housing, differential, and wheel ends have been established. Do not assume the original factory shaft length will work with a modified housing.
FAQ
What is the advantage of a 4340 chromoly axle shaft?
4340 chromoly steel is a high-strength alloy commonly used in performance drivetrain components because of its toughness and resistance to fatigue. Compared with many factory-style axle shafts, a properly manufactured 4340 shaft is better suited for the shock loads created by large tires, locking differentials, and high-torque off-road applications.
What does cut-to-length mean?
This axle shaft is designed to be shortened to the finished length required by the axle assembly. The 31"–35" length range gives builders flexibility when working with custom axle widths, narrowed housings, and fabricated rear axles. The final length must be measured and verified before cutting.
Will this axle shaft fit a factory GM 14-Bolt rear axle?
It may fit compatible factory-style GM full-float rear axle configurations, but fitment depends on the required shaft length, 30-spline differential, flange bolt pattern, and wheel-end design. It should not be treated as a universal direct-fit replacement for every GM 14-Bolt axle.
What is the benefit of cold roll-formed splines?
Cold roll-forming shapes the splines by displacing material rather than cutting it away. This process can improve fatigue resistance around the spline roots, where axle shafts experience high torsional loads during hard acceleration, rock crawling, and drivetrain shock.
Can I use this shaft with a locker or spool?
Yes, provided the differential or spool is designed for compatible 30-spline axle shafts and the complete axle assembly matches the shaft dimensions. Verify spline engagement and wheel-end compatibility before installation.
Does this shaft work with a 40-spline GM 14-Bolt differential?
No. This is a 30-spline axle shaft and is not compatible with a 40-spline differential or spool. The spline configuration of the axle shaft must match the differential side gear or spool.
Is this axle shaft sold individually or as a pair?
This listing includes one axle shaft. Two shafts are required for a complete rear axle assembly, and each side may require a different finished length depending on the housing configuration.
What measurements should I verify before ordering?
Confirm the required finished shaft length, differential spline count, flange bolt pattern, axle housing width, and wheel-end configuration. For custom axle builds, final measurements should be taken from the assembled housing and differential rather than relying on factory vehicle specifications.