Mack Truck Spindle – Large
Due to high demand, we’re proud to introduce the Large Mack Truck Spindle, built for heavy-duty Mack applications requiring exceptional load capacity and durability.
Forged from 4140 high-strength steel and treated with our multi-stage heat-hardening process, this replacement spindle is engineered to handle high-stress hauling, rugged terrain, and continuous heavy loads. Designed for dump trucks, commercial fleets, and vocational vehicles, it ensures optimal weight distribution and smooth suspension performance, and long-term reliability.
Each Large Mack spindle is precision-machined for a direct fit, allowing for streamlined, weld-free installation. Every unit is inspected, carefully packed, and shipped with a spacer sleeve, required for select truck models.
In stock
| Type: | Drive axle spindle |
| Recommended Fit For: | Mack trucks |
| Heat Treatment: | Yes |
| Weight: | 27.2 lbs |
| Length: | 599.4 mm |
| Warranty: | 1 Year Limited Warranty |
| Compatible Parts: | Outer Bearing 424, Inner bearing 423, Pro-Torque Lock nut 448-4865 |
In stock
Description
With over 300,000 Mack trucks on the road across North America, a high-performance replacement spindle is critical for fleet efficiency. The Large Mack Truck Spindle delivers exceptional durability in just under 28 lbs of masterfully hardened steel, built to outlast OEM parts and withstand intensive daily operations.
Leveraging the thermal resilience of 4140 steel, this spindle undergoes precision machining before receiving our specialized heat treatment, ensuring superior wear resistance and structural integrity. Designed to seamlessly integrate with Mack truck axles, it provides balanced load handling, improved alignment, and long-lasting braking performance—keeping your fleet running smoother, longer, and more efficiently.
Required Tools
Having the right tools and equipment is key to a successful installation. This list covers essential equipment that most shops already have, but we recommend taking a moment to ensure everything is on hand before beginning.
Safety Equipment
- Ear Plugs
- Gloves
- Face shield
- Safety glasses
Specialized Tools
- Acetylene and oxygen tank with cutting and heating torch
Hand Tools
- Sledge hammer
- Wire brush
Lubricants, Fluids
- Red-Tac EP2 grease
- Brake cleaner
Additional Tools Available in Our Store
Mack Spindle Large – Frequently Asked Questions
How do I know if my Mack truck spindle needs replacement?
Common signs of a failing spindle include uneven tire wear, steering instability, vibrations, and reduced braking performance. If these issues persist, a spindle replacement may be necessary to restore proper alignment and handling.
What is the weight capacity of the Mack Truck Spindle – Large?
This heavy-duty replacement spindle is designed to support up to 40 tons, meeting the demands of industrial, vocational, and construction trucking applications.
Is this the right spindle for the job?
Not sure if this will fit your truck?
The Mack replacement spindle is designed to fit most Mack trucks. Here is a list of parts compatible with our spindle:
- Outer Bearing 424
- Inner bearing 423
- Pro-Torque Lock nut 448-4865
If you’re still in doubt, contact us and we’ll help you find the right product.
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