This driving pinion nut is designed as an OE-equivalent replacement for ISUZU NPR, NQR, and NPR-HD medium-duty trucks equipped with 4HE1 4.8L or 4HK1 5.2L diesel engines from 1995 to 2024. The nut secures the driving pinion in the drivetrain assembly, maintaining correct preload and alignment for stable and reliable power transmission. Precision-manufactured to OEM specifications, this pinion nut ensures proper thread engagement, consistent torque retention, and long-term durability under heavy load and vibration. Ideal for drivetrain service, overhaul, or replacement of worn, stretched, or damaged original hardware.

OE-Equivalent Pinion Nut — Manufactured to factory dimensions for correct thread fit, torque specification, and secure pinion retention

Vehicle & Engine Compatibility — Fits ISUZU NPR, NQR, and NPR-HD trucks with 4HE1 4.8L and 4HK1 5.2L diesel engines (1995–2024)

Maintains Drivetrain Alignment — Helps preserve correct pinion bearing preload and gear alignment for smooth and quiet drivetrain operation

Heavy-Duty Steel Construction — Built to withstand high torque loads, vibration, and continuous commercial-duty use

Prevents Loosening & Wear — Designed to maintain clamping force and reduce the risk of pinion movement or premature gear wear

Direct Replacement Hardware — Installs in place of the original pinion nut with no modifications required (professional installation recommended)

OEM 8970471460