Description
The WA01-8829C is a rolling-lobe air spring engineered for the Volvo VNL/VNM and Mack Vision drive-axle suspension. It directly replaces Firestone 8829 / W01-358-8829, Goodyear 1R12-405, Volvo 20505399, and the broader Firestone 1T15M-6 family of part numbers used across these chassis.
Signs You Need a New Air Spring
- Truck sits low or leans to one side at rest
- Audible air leak around the bag, especially after dump-and-fill cycles
- Cracks, abrasion, or chunking visible on the rubber bellows
- Suspension fails to level or holds pressure poorly with the engine running
- Rough ride or harsh impacts from a collapsed bag
Specifications
| Manufacturer | World American |
|---|---|
| Part Number | WA01-8829C |
| Part Type | Rolling-Lobe Air Spring (Drive Axle) |
| Extended Height | 20.0 in. (21.0 in. max) |
| Compressed Height | 6.10 in. (6.70 in. min) |
| Max Diameter | 12.60 in. |
| Top Plate | 3254 — 9 in. dia., 2 holes, 5.5 in. C-to-C |
| Piston | 4008 — 10 in. dia., aluminum, 1 hole, 2.25 in. C-to-C |
| Bracket | 6027 |
| Vehicle Compatibility | Volvo VNL / VNM, Mack Vision (CXN/CHN) |
Cross References
This part replaces or is equivalent to the following part numbers:
- Firestone: 8829, W01-358-8829
- Goodyear: 1R12-405, 1R12-508, 1R12-595, 1R12-615, 1R12-647, 1R12-1083, 1S12-002, 1S12-033, 1S12-035
- Volvo: 3934699, 8079902, 8084296, 8097092, 20396293, 20413888, 20505399, 20733034
- Mack: 57QL54M
- ContiTech: 74884, 9 10-16 P 449, 9 10S-17 P 1154
- Automann: AB1DK23P-8829
- Dayton: 352-8829
- Meritor: FS8829
- Euclid: E-FS8829
- Triangle: 8449, AS-8449
- Paccar: AS11543
- HD Value: HDV8829
- Torque: TR8829
- Sampa: SP558829-KP
Applications
This air spring fits the following drive-axle suspensions:
- Volvo VNL / VNM tractors with rear air-ride suspension (1997-2017)
- Mack Vision CXN / CHN tractors with air-ride suspension (2001-2007)
Representative vehicles using this air spring:
- Volvo VNL 300 / 430 / 630 / 670 / 730 / 780 (1997-2017)
- Volvo VNM 200 / 430 / 630 (1998-2017)
- Mack Vision CXN / CHN (2001-2007)
Verify your suspension model, mounting hole pattern, and existing air spring height before ordering to confirm fitment.
