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Yukon Gear YA WGM14T-30-38 4340 Chromoly Rear Axle GM 11.5in 14-Bolt 30-Spline 38in
The Yukon Gear YA WGM14T-30-38 is a high-performance replacement rear axle for GM 11.5 in. AAM 14-bolt trucks. Manufactured from 4340 chromoly steel with cold-roll formed splines and induction heat treating, this 30-spline, 38 in. axle provides the durability needed for towing, off-road, and performance applications on 2001-2010 GM 2500HD and 3500HD trucks. Yukon's Lifetime Warranty is included, with Magnuson-Moss protections applicable for drivetrain warranty claims.
Key Features
- 4340 chromoly steel — significantly stronger than OEM alloy for demanding use
- Cold-roll formed splines — superior spline geometry and surface finish versus cut splines
- Induction coil heat treating — maximizes surface hardness while maintaining core toughness
- 30-spline design — matches GM AAM 11.5 in. 14-bolt truck axle specification
- 38 in. length — fits the GM 11.5 in. AAM 14-bolt full-floating rear axle
- Yukon Lifetime Warranty — Magnuson-Moss protections apply for drivetrain claims
What's Included
- 1x Yukon YA WGM14T-30-38 rear axle shaft
Specifications
| Specification | Detail |
|---|---|
| MPN | YA WGM14T-30-38 |
| UPC | Not available |
| Material | 4340 chromoly steel |
| Spline Count | 30 |
| Length | 38 in. |
| Differential | GM AAM 11.5 in. 14-bolt truck |
| Warranty | Yukon Lifetime Warranty (Magnuson-Moss applies) |
| Fitment | 2001-2010 Chevrolet Silverado 2500HD / 3500HD, GMC Sierra 2500HD / 3500HD (AAM 11.5 in. rear) |
This Part Fits
| Year | Make | Model |
|---|---|---|
| 2001-2010 | Chevrolet | Silverado 2500 |
| 2001-2010 | Chevrolet | Silverado 3500 |
| 2001-2010 | GMC | Sierra 2500 |
| 2001-2010 | GMC | Sierra 3500 |
Frequently Asked Questions
-
Q: What differential does the YA WGM14T-30-38 fit?
A: This axle fits the GM AAM 11.5 in. 14-bolt full-floating rear axle found in 2001-2010 Silverado and Sierra 2500HD and 3500HD trucks. -
Q: Why use 4340 chromoly over OEM alloy?
A: 4340 chromoly has a significantly higher tensile strength than standard axle alloys, making it better suited for towing heavy loads, off-road use, and performance applications where axle breakage is a concern. -
Q: Is this a full-floating axle shaft?
A: Yes. The GM 11.5 in. 14-bolt uses a full-floating axle design, and this Yukon shaft is the correct specification for that application. -
Q: Does this come with a warranty?
A: Yes. Yukon Gear provides a Lifetime Warranty. Magnuson-Moss protections are applicable for drivetrain warranty claims. -
Q: What spline count does this axle have?
A: 30 splines, matching the GM AAM 11.5 in. 14-bolt truck specification. -
Q: Will this fit my 2008 Silverado 2500HD Duramax?
A: Yes, provided it is equipped with the AAM 11.5 in. rear differential, which is standard on these trucks. -
Q: What is cold-roll forming?
A: Cold-roll forming compresses the metal rather than cutting it, resulting in stronger grain flow and better surface finish on the splines, improving resistance to fatigue and shear forces. -
Q: Do I need any special tools to install this axle?
A: Standard full-floating axle removal procedures apply. The axle flange bolts to the hub, requiring basic hand tools. A torque wrench is required.
Installation Instructions
Raise and safely support the rear of the vehicle. Remove the rear wheel and brake drum or rotor. Remove the axle flange bolts securing the full-floating axle shaft to the wheel hub. Slide out the old axle shaft. Install the Yukon YA WGM14T-30-38 by sliding it into the differential and aligning the flange holes to the hub. Torque all flange bolts to OEM specification. Reinstall brakes and wheel. Verify differential fluid level after installation.
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