Rebuilding an NP435 4-speed manual transmission? You'll need these! This is a pack containing 14 of the mainshaft pilot needle bearings, a critical component inside the gearbox. The part number is Q15902, sourced from National Drivetrain. These bearings are brand new, unused, and come in their original packaging, ensuring they're free of damage or contamination. Using fresh, high-quality bearings like these during a rebuild is key to ensuring smooth shifting and long transmission life. This pack gives you exactly the quantity needed for the job. National Drivetrain backs it with a 1-year warranty. A must-have for any serious NP435 rebuild project, whether it's for a classic Ford, Dodge, or other truck that used this rugged transmission.