Red Line MT85 Manual Transmission Lubricant 1QT - Universal
Red Line MT85 Manual Transmission Lubricant 1QT - Universal
Red Line
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Every product is sourced from authorized manufacturers or distributors. If something isn’t right with fitment or condition, we’ll work with you to resolve it fairly.
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PRODUCT DETAILS ▾
RallySport Direct is proud to provide the automotive enthusiast with a great selection of Red Line Fluids.
This is the Red Line MT85 (75W85 GL-4) Gear Oil. Red Line engineered this oil to provide your drivetrain with optimal lubrication properties, anti-friction protection, as well as protection against heat. This particular gear oil has been designed to fill the gap between MTL (70W80 GL-4) and MT90 (75W90 GL-4)
DETAILS:
- Provides superior gear and synchronizer protection
- Balanced slipperiness provides an improved coefficient of friction for easier shifting over a range of temperatures
- Safe for brass synchros
- Lacks damaging, reactive sulfurs found in most GL-5 oils
- Recommended for GL-1, GL-3, and GL-4 applications
- Sold individually in a 1 US quart container
WHY WE CARRY THIS ▾
We only list parts we’d run ourselves or recommend to a friend building a real car. If it feels vague, unverified, or inconsistent, it doesn’t make the cut.
- Fitment-first mindset — no “universal” roulette
- Brand reputation matters — we favor proven manufacturing
- Support that actually responds with real answers
WHAT TO EXPECT ▾
This is the clean path: correct fitment, clean install, and results that match the intent.
- Install-ready experience with correct mounting where provided
- Finish that holds up to real driving, not just photos
- Selections on this page drive the exact fitment shipped
TRUST, BUILT INTO THE PROCESS.
Anyone can list parts. We curate what belongs on a serious build. Our goal is simple: fewer surprises, cleaner installs, and confidence when you hit “Buy.”
Fitment checked
We prioritize vehicle-specific listings and clear selection logic so you’re not gambling on compatibility.
Brand discipline
Proven manufacturing and consistent quality matter more than hype. We bias toward what actually holds up.
Real support
If you have a question, you’ll get a human answer that helps you finish the build — not a copy-paste shrug.
RallySport Direct is proud to provide the automotive enthusiast with a great selection of Red Line Fluids.
This is the Red Line MT85 (75W85 GL-4) Gear Oil. Red Line engineered this oil to provide your drivetrain with optimal lubrication properties, anti-friction protection, as well as protection against heat. This particular gear oil has been designed to fill the gap between MTL (70W80 GL-4) and MT90 (75W90 GL-4)
DETAILS:
- Provides superior gear and synchronizer protection
- Balanced slipperiness provides an improved coefficient of friction for easier shifting over a range of temperatures
- Safe for brass synchros
- Lacks damaging, reactive sulfurs found in most GL-5 oils
- Recommended for GL-1, GL-3, and GL-4 applications
- Sold individually in a 1 US quart container
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