Description
ATRO CM75-61257 polyurethane cab-sleeper mount — direct replacement for Peterbilt 20-08257 — used at the cab-and-sleeper isolator position on Peterbilt Unibilt models 357, 365, 378, 379, 385, and 389. Sold as the mount only; for a complete installation with new hardware, see ATRO KT75-61257.
Specifications
| Manufacturer | ATRO Engineered Systems |
|---|---|
| Part Number | CM75-61257 |
| Part Type | Cab-Sleeper Mount |
| Largest Outside Diameter | 3-1/8 in |
| Inside Diameter | 21/32 in |
| Hardware Included | No (mount only — see KT75-61257 for kit) |
| Material | Polyurethane |
Cross References
This cab-sleeper mount replaces or is equivalent to the following part numbers:
- Peterbilt: 20-08257
- Energy Suspension: 30.4015
- Dyco: D443, D-443
Applications
This mount fits the following Peterbilt Unibilt cab-sleeper chassis:
- Peterbilt 357 (vocational set-back-axle)
- Peterbilt 365 (vocational/heavy-haul)
- Peterbilt 378 (set-forward-axle on-highway)
- Peterbilt 379 (long-hood on-highway)
- Peterbilt 385 (set-back-axle on-highway)
- Peterbilt 389 (long-hood on-highway, 379 successor)
Verify chassis cab style and existing mount stamping before ordering.









