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Red Line MT-90 75W-90 Synthetic Gear Oil for Manual Transmissions

Red Line ★ 4.0/5 · ItemOracle Score Mid-Range

$92 USD
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Red Line 50304, MT-90 75W-90 GL-4, Synthetic Gear Oil for Manual Transmission and Transaxles - 4 Quart

Synthetic gear oil for manual transmissions and transaxles. Improves shift feel and synchro life, even when cold. Performance claims align with customer feedback on smoother shifting

Highlights

  • Quicker shifts
  • Smooth shifts when cold
  • Compatibility with GL-1/GL-3/GL-4

Pros

  • Quicker shifts
  • Improved synchronizer coefficient of friction
  • Smooth shifting even when cold
  • Suitable for GL-1, GL-3 and GL-4 applications
  • High performance gear protection

Cons

  • No customer-insight data available

Best For

  • manual transmission maintenance
  • transaxle lubrication
  • cold-weather shifting improvement
  • gear protection under load
  • synthetic gear oil replacement for manual drivetrains
  • transmission longevity

Features

  • Provides high performance gear protection and longer synchro life
  • Improves shifting responsiveness and reduces notchy shifts when cold
  • Compatible with GL-1, GL-3, GL-4 applications and brass synchros safe
  • Lacks reactive sulfurs found in many GL-5 oils, reducing potential gear damage
  • Satisfies viscosity for 75W; compatible with 80W, SAE 40, 10W-40 and 15W-40

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