75w90 Manual Transmission Fluids of 2025
Best Choice1
Red Line20% OffRed Line 50305 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Gallon (4 Pack)
Main highlights- WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises.
- REQUIREMENTS - gear oil viscosity of 75W; 80W; SAE 40 10W40 and 15W40 motor oil
- QUICKER SHIFTS - perfect synchronizer coefficient of friction and eliminates notchy shifting, even when cold
- POPULAR GEAR OIL FOR - GL-1, GL-3 and GL-4 applications, as well as where most special synchromesh fluids are specified. Safe for brass synchros, as it lacks the reactive sulfurs found in most GL-5 oils that cause damage
- HIGH PERFORMANCE - gear protection and longer synchro life. Recommended for GL-1, GL-3, and GL-4 applications.
9.7Exceptional
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Value for Money2
Red LineRed Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL)- 1 Quart (12 Pack)
Main highlights- WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises
- REQUIREMENTS - gear oil viscosity of 75W; 80W; SAE 40 10W40 and 15W40 motor oil
- QUICKER SHIFTS - perfect synchronizer coefficient of friction and eliminates notchy shifting, even when cold
- POPULAR GEAR OIL FOR - GL-1, GL-3 and GL-4 applications, as well as where most special synchromesh fluids are specified. Safe for brass synchros, as it lacks the reactive sulfurs found in most GL-5 oils that cause damage
- HIGH PERFORMANCE - gear protection and longer synchro life. Recommended for GL-1, GL-3, and GL-4 applications.
9.4Excellent
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3
TriaxTRIAX Synergy Gear MT 75W-90 GL-4 (MT-90); Full Synthetic Manual Trans Fluid; Smooth Shifting; No Sticking, Slipping, Vibration, or Shudder; Yellow Metal Safe (1 Gallon)
Main highlights- Widely compatible with a huge range of manual transmissions from BMW, VW/Audi, Ford, GM, Mercedes Benz 235.11, Toyota, Jeep, and many others; also recommended as where synchromesh fluids are specified
- PAO / Ester Full synthetic formulation with no compromises; very low pour point with rapid shifting even in very cold weather (-45°F)
- No reactive sulfurs; yellow metal / brass synchro safe as well as copper and aluminum alloys
- Frictionally optimized for exceptionally smooth shifting, synchronizer engagement, and frictional stability; prevents shudder, sticking, slipping, and notchy shifting
- Extremely long drains, capable of 150,000+ miles drain intervals
- Excellent gear protection in high horsepower / high speed conditions and sustained mechanical / thermal loads such as racing and off-road conditions
9.2Excellent
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4
Red Line Oil13% OffRed Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart (4 Pack)
Main highlights- WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises
- REQUIREMENTS - gear oil viscosity of 75W; 80W; SAE 40 10W40 and 15W40 motor oil
- QUICKER SHIFTS - perfect synchronizer coefficient of friction and eliminates notchy shifting, even when cold
- POPULAR GEAR OIL FOR - GL-1, GL-3 and GL-4 applications, as well as where most special synchromesh fluids are specified. Safe for brass synchros, as it lacks the reactive sulfurs found in most GL-5 oils that cause damage
- HIGH PERFORMANCE - gear protection and longer synchro life. Recommended for GL-1, GL-3, and GL-4 applications.
8.9Very Good
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5
GENUINE SUBARUSubaru 75W90 Extra S Gear & Transmission Fluid - 5 Quart Bottles Sti WRX Genuine SOA427V1700 X5
Main highlights- The extra S 5 gallon pail is no longer available and is now superseded by these quarts.
- SOA427V1700 X5
- For use in MANUAL transmissions only.
- 5 QUARTS OF GENUINE Subaru 75w-90 High Performance Gear Oil
- 5 & 6 Speed manual transmissions
8.8Very Good
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6
ULTRA 1PLUSULTRA 1PLUS SAE 75W-90 Synthetic Gear Oil, API GL-4 - Transmission and Differential Fluid (12 QTS)
Main highlights- YEAR-ROUND PERFORMANCE AND VISCOSITY: Meets SAE J306 viscosity requirements for year-round, all-weather performance. Exceeds API GL-4 standards for automotive axle gears, maintaining stability in diverse conditions.
- OPTIMAL TEMPERATURE RESILIENCE: Maintains adequate lubrication in low and high temperatures.
- LEAKAGE PREVENTION & EXTENDED PERFORMANCE: Minimizes leakage, ensuring cleaner operations and reduced contamination risks. Formulated with a Limited Slip Differential additive package for enhanced performance.
- ENHANCED GEAR & BEARING LONGEVITY: Forms a robust, stable lubrication film, reducing wear for prolonged gear and bearing life. Minimizes deposits, extending the life of critical components and reducing maintenance costs.
- ADVANCED 75W-90 GL-4 FORMULA: Premium synthetic base oils ensure superior thermal stability and cleanliness. Special anti-scuffing and friction modifiers ensure advanced protection under extreme pressure.
8.7Very Good
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7
ULTRA 1PLUS20% OffULTRA 1PLUS SAE 50 Full Synthetic Manual Transmission Fluids (CD-50) & SAE 75W-90 Synthetic Gear Oil API GL-5
Main highlights- SEVERE SERVICE PROTECTION: Specially formulated for heavy-duty transmissions, this SAE 50 Full Synthetic Fluid offers rust, oxidation, and corrosion protection in severe heat and shear conditions.
- MAXIMUM GEAR PROTECTION: Extreme pressure anti-wear additives safeguard gear teeth from shock loading and high torque, ensuring prolonged gear life and reduced maintenance needs.
- LONGER EQUIPMENT LIFE: 75W-90 GL-5 gear oil is formulated with synthetic base oils and specialty performance additives to provide high-temperature thermal and oxidative stability in a wide range of operating conditions.
- EXTENDED EQUIPMENT LIFE: U1P-Drive CD-50 ensures longer equipment life with exceptional gear/bearing wear protection and anti-wear additives.
8.4Good
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8
Red LineRed Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL)- 1 Quart (12 Pack)
Main highlights- WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises
- REQUIREMENTS - gear oil viscosity of 75W; 80W; SAE 40 10W40 and 15W40 motor oil
- QUICKER SHIFTS - perfect synchronizer coefficient of friction and eliminates notchy shifting, even when cold
- POPULAR GEAR OIL FOR - GL-1, GL-3 and GL-4 applications, as well as where most special synchromesh fluids are specified. Safe for brass synchros, as it lacks the reactive sulfurs found in most GL-5 oils that cause damage
- HIGH PERFORMANCE - gear protection and longer synchro life. Recommended for GL-1, GL-3, and GL-4 applications.
8.1Good
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9
ACDelcoACDelco GM Original Equipment 10-4070 GL-4 75W-90 Limited Slip Coupling (LSC) 301 Manual Transmission Fluid - 1 L
Main highlights- Specifically formulated for use in vehicles with a model year 2009+ Haldex limited slip coupling
- Engineered with specialized friction characteristics: prevents clutch stick slip, protects against corrosion, and provides excellent lube and shear performance
- All-climate fluid that manages temperatures as low as -22 degrees Fahrenheit (-30 degrees Celsius) to as high as 284 degrees Fahrenheit (140 degrees Celsius)
8.0Good
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10
Motul26% OffMotul 105777 Set of 5 Gear 300 75W-90 Transmission Fluid 1-Liter Bottles
Main highlights- Less effort required on the gear lever to shift the gears
- 90 grade at hot temperature to provide outstanding oil film resistance at hot temperature and/or to reduce transmission noise
- 100 Percent synthetic extreme pressure lubricant for an efficient anti-wear protection
- 100 Percent Synthetic Ester based
- 0 Percent shear loss : Unshearable oil film in extreme conditions
7.9Good
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