Engineered for heavy-duty linehaul applications, this 18-speed manual transmission features a robust design with torque capacity up to 1850 lb-ft. The FLEX configuration offers enhanced durability and smoother gear transitions, making it ideal for demanding Peterbilt and Kenworth trucks. Built by Eaton Fuller, this transmission is trusted across fleets for its long service life, fuel efficiency, and ease of maintenance.
Product Highlights
| Feature | Details |
|---|---|
| Function | Heavy-Duty Manual Transmission |
| Speeds | 18 Forward Speeds, 4 Reverse |
| Torque Capacity | Up to 1850 lb-ft |
| Input Shaft | 2" Diameter, 10 Spline |
| Shift Type | Overdrive with Split and Range Selector |
| Design | FLEX Configuration for Enhanced Durability |
| Lubrication | Synthetic Oil Recommended |
| Applications | Peterbilt 389, 579; Kenworth W900, T800 |
| Benefits | Smooth Shifting, Fuel Efficiency, Long Service Life |
| Condition | New, OEM-Quality Replacement |
Some parts, like starters, alternators, and brake shoes, have a core, which is the old part that can be rebuilt or recycled. When you buy a part with a core, you're charged the full price upfront, including the core charge.
Once you return the old part (the core), you'll receive a core rebate—a refund of the core charge—back to your original payment method.
For detailed instructions on how to process a core return click the button below.
- UPS Shipping: We ship via UPS to customers in Ohio, Michigan, Pennsylvania, Indiana, Kentucky, and West Virginia.
- Local Delivery: We provide local delivery to any business located within 50 miles of one of our locations.
- In-Store Pickup: You can pick up your order at any of our ten Ohio Peterbilt locations.
- Oversized Parts: These parts are only available for local delivery within 50 miles of one of our locations or in-store pick-up. If you'd like to schedule other delivery options, please contact us at (440) 586-4528.
Standard Returns (Stock Items) Ohio Peterbilt accepts returns of stock truck parts within 30 days of purchase, provided the items are new, unused, and in resaleable condition with original packaging and all components intact. A copy of the original sales receipt or invoice should accompany the return to verify the purchase date.
If you're a tax-exempt customer, please complete our tax exempt form by click the button blow or contact us at ecommerce@ohiopeterbilt.com. We’ll help set up your online account so you can start placing tax-exempt orders.