Red Line 75W90NS Gear Oil 1QT – Reflected Image Motorsports
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Red Line 75W90NS Gear Oil 1QT

  • $ 2493

  • Brand: Red Line
  • Part #: 58304
  • Class: GL5
  • Friction Modifier: No
  • Type: Synthetic
  • Volume: 1 qt
  • Color: Yellow
  • Mfgr. Warranty: No Warranty

This is the Red Line 75W90NS GL-5 Gear Oil. This is a fully-synthetic GL-5-type gear oil that doesn't contain the friction modifiers for limited-slip hypoid differentials. This makes the transmission synchronizers come to equal speeds more quickly, allowing faster shifting and much easier low-temperature shifting. Can also be used in racing limited-slip differentials when weak spring design causes too much wheel spin.

Recommended for Subaru manual transmissions. 



  • Designed for transmissions and transaxles - helps to slow synchros for easier shifting across a broad temperature range
  • Popular for Subaru, Porsche, and Ferrari transaxles
  • Ideal for muscle car applications such as the Ford Top Loader, Muncie transmissions, Borg-Warner T-10 and Super T-10
  • Contains extreme pressure additives like the Red Line 75W90 GL-5 oil, but lacks friction modifiers to balance slipperiness
  • Improved copper corrosion protection to prolong synchro life
  • Helps with lock-up on weak limited-slip differentials and compatible with Red Line Limited Slip Friction Modifier for tuning slippage 
  • Also used with clutch-type LSD's in racing for maximum lock-up
  • Recommended for API GL-5, GL-6, MT-1. MIL-L-2105E and SAE J2360
  • Non-corrosive formula - safe for use with all synchro materials
  • Sold individually in a 1-quart container