8973865820 Isuzu GEAR; 6TH,MAINS, Price: 186.88$, Weight: 0.4kg
| Make | Number | Name | Availability | Weight, kg | Ship in, Days | Price |
|---|---|---|---|---|---|---|
Isuzu |
8973865820 |
GEAR; 6TH,MAINS |
10 |
0.4 |
2-3 |
186.88$ |
6th Speed Mainshaft Gear (Manual Transmission)
This drivetrain gear is a key part inside the manual gearbox that delivers the highest cruising ratio. It’s needed to keep engine RPM low at highway speeds, improving fuel economy, reducing noise, and helping the vehicle feel smoother on long drives ?.
How This Gear Works
When you select 6th gear, the shift mechanism locks this gear into the power flow. It meshes with its matching gear to transmit torque from the input side to the mainshaft, creating an overdrive-style ratio. Proper tooth shape and hardening allow it to carry load without slipping, while correct lubrication prevents heat and metal wear.
What Happens If It’s Worn or Broken
A damaged gear can cause whining or grinding, popping out of 6th, hard shifting, vibration under load, and metal filings in the oil. If teeth chip or strip, the gearbox may lose 6th completely and can spread debris through bearings and synchros, leading to expensive internal failure ⚠️.
Technician Tip
Always inspect the matching gear, synchronizer hub, and oil condition during replacement to avoid repeat wear.