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(888) 312-8812 Login SignupHave you ever noticed grinding or hesitation during gear changes in a heavy-duty transmission? The PAI Maindrive Gear Kit steps in as a service solution for Fuller 15210 and 16210 series transmissions, helping restore how power moves through the gearbox. This kit replaces worn maindrive components that handle torque during operation, allowing the transmission to cycle more cleanly through gear ranges. It’s commonly used during rebuilds where internal wear has affected performance. Shops working on high-mileage trucks often turn to this type of kit to bring the transmission back into working condition. During overhaul work, the PAI 900170E helps re-establish gear engagement inside the transmission.
| Notes | Maindrive Gear Kit Fuller 15210/16210 Series application |
| Brand | Part Number |
|---|---|
| FULK-3420, 900170E, K-3420 | |
| Fuller- Transmissions | 4302309, 4302315, 4303032, K-3420, S-2395 |
| Mack | 3088-4302309, 3088-4302315, 3088-4303032, 3088-K3420, 3088-S2395 |
| PAI | 900170E |
| WORLD AMERICAN | K3420 |
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