Front Leaf Spring U-Bolt 8-94157676-0 8941576760 For ISUZU NPR66 NPR-HD NQR NRR 4HK1 4JJ1 — OEM Verified Direct Fit, Front Axle Suspension Clamp

The Front Leaf Spring U-Bolt with OEM numbers 8-94157676-0 / 8941576760 is a verified replacement suspension fastener for ISUZU NPR66, NPR-HD, NQR, and NRR series trucks equipped with 4HK1 (5.2L) and 4JJ1 (3.0L) diesel engines. This U-bolt is the front spring-to-axle clamping component that secures the leaf spring pack to the front axle housing, maintaining correct suspension geometry, ride height, and axle alignment under load.

The part is cataloged by Turkish-market ISUZU suppliers as "MAKAS BAĞLANTISI ÖN (KISA U OLAN)" — the front spring connection, short-U version — for the NPR66 application. A secondary cross-reference to 8944125043 is listed by an independent equipment marketplace, indicating interchangeability within the same U-bolt family. GMPartsWiki data also lists the legacy short number 94157676 as discontinued, which typically means the part has been superseded — always verify the current active OE reference before ordering.

• Position Verified: Confirmed by ISUZU parts supplier listings explicitly describing "Front Spring U-Bolt" for NQR / NPR-HD / NRR applications.
• Turkish-Market Fitment Verified: "ISUZU NPR66 MAKAS BAĞLANTISI ÖN (KISA U OLAN)" — a direct NPR66 front spring short-U connection listing for part 8941576760.
• Cross-Reference Verified: 8941576760 / 8944125043 listed together as ISUZU Genuine front spring U-bolt references.
• Vehicle Coverage Verified: Confirmed for ISUZU NQR, NPR-HD, NRR (2004–2018) with 4HK1 5.2L, and NPR / NPR-HD / NQR (2006–2018) with 4HK1 5.2L / 4JJ1 3.0L.
• OEM Supply Positioning: Multiple ISUZU parts specialists list this as a "New OEM" suspension fastener, positioned as a direct replacement for factory hardware.

• Clunking or popping from the front suspension: A stretched or loose U-bolt allows the axle to shift relative to the leaf spring, producing a metallic clunk over bumps or during braking.
• Visible axle misalignment: The front axle sits off-center or the wheel track appears uneven — a sign the U-bolt no longer maintains clamping force.
• Uneven or accelerated front tire wear: Axle misalignment from a loose U-bolt changes toe and camber angles, causing shoulder wear or cupping.
• Rusted, stretched, or necked-down U-bolt studs: Corrosion and thread deformation reduce clamping load and are a safety concern on loaded commercial vehicles.
• Suspension noise or vibration at speed: A loose U-bolt allows relative movement between the spring and axle, transmitting vibration through the chassis.

• Front position is critical: This is a front spring U-bolt. Rear spring U-bolts use different lengths and clamping configurations. Do not substitute front for rear or vice versa.
• "Short U" configuration: The Turkish catalog description specifies "KISA U OLARAK" (short-U version) for the NPR66 application. Verify the leg length and inside width against the original unit — long-U and short-U variants are not interchangeable.
• Legacy number is discontinued: The short number 94157676 is listed as discontinued in GM parts data. This typically indicates a supersession; confirm the current active 8-94157676-0 or 8941576760 reference with the supplier before ordering.
• 4HK1 vs. 4JJ1: Both engine families are listed under the same front U-bolt application window for NPR / NPR-HD / NQR (2006–2018). However, always confirm the engine code against the vehicle documentation.
• Provide the VIN and original U-bolt measurements at inquiry to eliminate the risk of short-U vs. long-U mismatch, especially on NPR66 applications.

1. Safety first: Park on level ground, engage parking brake, and chock rear wheels. Raise and support the front axle securely on jack stands.
2. Support the leaf spring: Use a jack under the leaf spring pack to relieve tension before removing the U-bolt nuts.
3. Remove the old U-bolt: Hold the U-bolt legs to prevent rotation and remove the nuts. Note the orientation of the U-bolt, spring seat, and any spacers.
4. Inspect the leaf spring and axle seat: Check for cracks, wear, or corrosion at the spring-to-axle interface. Replace damaged spring components before installing new hardware.
5. Install the new U-bolt: Seat the U-bolt over the leaf spring and through the axle bracket. Install new washers and nuts — do not reuse old nuts, as they may have lost prevailing torque.
6. Torque in stages: Tighten the nuts evenly in a cross pattern to the workshop manual specification. Uneven tightening can cock the U-bolt and cause axle misalignment.
7. Re-check torque after settling: Drive the vehicle a short distance, then re-check U-bolt nut torque. Suspension hardware can settle after initial load cycles.
8. Verify axle alignment: After installation, confirm the front axle is centered and that the vehicle tracks straight before returning to service.

• Inspect front U-bolts at every suspension service or every 20,000–30,000 km — check for rust, thread damage, and clamping force.
• Re-torque U-bolt nuts after the first 500–1,000 km following installation, and periodically thereafter.
• Replace U-bolts whenever the leaf springs are replaced — reusing stretched or corroded hardware compromises clamping force.

• Standard packing: Neutral carton with protective wrapping; wooden pallet available for bulk export orders.
• Package contents: 1 * Front Leaf Spring U-Bolt (nuts and washers not included unless explicitly stated — confirm at inquiry).
• Set options: Single U-bolt or front axle set (typically 4 pieces per vehicle) — specify at inquiry.
• Minimum order: 1 pc (sample) / bulk quantity pricing available.
• Suitable for: ISUZU N-Series suspension repair shops, fleet maintenance departments, spare parts distributors, and export wholesalers.
• Related parts available: U-bolt nuts and washers, leaf spring center bolts, spring seats, and complete front suspension hardware kits.