The Differential Gear Set (Part Number: SAH088) is a premium-quality, direct replacement drivetrain component set designed for Isuzu trucks. This ring and pinion set consists of a drive pinion and ring gear that transfers engine torque from the driveshaft to the rear axles at reduced speed with multiplied torque.

• OE Quality: Manufactured to Isuzu dimensional and metallurgical specifications
• Precision Hypoid Design: Quiet operation and high torque capacity
• Case-Hardened: HRC 58-62 surface hardness for exceptional wear resistance
• Match-Lapped: Optimized tooth contact pattern for minimal noise
• Restores Differential Performance: Eliminates howling, whining, and clunking
• Direct Replacement: Matches OE dimensions and gear ratio
• Cost-Effective: Affordable alternative to genuine OEM sets

This differential gear set is designed for various Isuzu truck models including:

• Isuzu NPR: NPR59, NPR66, NPR70, NPR71, NPR75, etc.
• Isuzu NKR: NKR55, NKR57, NKR59, etc.
• Isuzu FSR, FVR, CXZ: select models (verify compatibility)

1. Remove differential carrier from axle housing
2. Remove old ring and pinion, press off old bearings
3. Install new pinion with new bearings and crush sleeve, set preload
4. Install new ring gear on differential case, torque bolts
5. Install case into housing, adjust side bearing preload and backlash (0.15-0.25mm)
6. Check tooth contact pattern with marking compound; adjust shims as needed
7. Recheck preload, backlash, and pattern
8. Install new pinion seal and refill with gear oil
9. Road test and break in gears (gentle driving for first 50 km, then change oil)

• Material Verification: Forged steel composition and hardness tested
• Dimensional Inspection: Pitch diameter, tooth thickness, runout verified
• Hardness Testing: Surface hardness (HRC 58-62) confirmed
• Tooth Profile Inspection: Involute profile and lead measured
• Lapping Verification: Contact pattern checked
• Noise Testing: Sample sets tested on gear roll tester
• Magnetic Particle Inspection: 100% crack detection
• Packaged Safely: Coated with anti-rust oil, individually wrapped, boxed with foam