Best 75w90 Gl4 Gearbox Oil of 2026

Last updated on 04/04/2026
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1
Comma SXGL45L Semi-Synthetic Gear Oil, 5 Liters

Comma SXGL45L Semi-Synthetic Gear Oil, 5 Liters

Castrol
17% Off
Why we love it
  • Superior protection for gearboxes.
  • Ideal for modern transmissions.
  • Trusted by leading manufacturers.
Main Highlights
  • Semi-synthetic gear oil
  • Suitable for modern five and six speed gear boxes
  • Recommended by Comma for certain applications where a 75W-90, 80W-90 or 85W-90 API GL-4 oil is specified
  • Specifications: API GL4
  • Comes in a 5 litre bottle
  • Semi-synthetic gear oil
  • Suitable for modern five and six speed gear boxes
  • Recommended by Comma for certain applications where a 75W-90, 80W-90 or 85W-90 API GL-4 oil is specified
  • Specifications: API GL4
  • Comes in a 5 litre bottle
Show More
9.9
Exceptional
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9.9
Exceptional
Castrol

Comma SXGL45L Semi-Synthetic Gear Oil, 5 Liters

17% Off
Why we love it
  • Superior protection for gearboxes.
  • Ideal for modern transmissions.
  • Trusted by leading manufacturers.
Main Highlights
  • Semi-synthetic gear oil
  • Suitable for modern five and six speed gear boxes
  • Recommended by Comma for certain applications where a 75W-90, 80W-90 or 85W-90 API GL-4 oil is specified
  • Specifications: API GL4
  • Comes in a 5 litre bottle
  • Semi-synthetic gear oil
  • Suitable for modern five and six speed gear boxes
  • Recommended by Comma for certain applications where a 75W-90, 80W-90 or 85W-90 API GL-4 oil is specified
  • Specifications: API GL4
  • Comes in a 5 litre bottle
Show More
Value for Money
2
Smith & Allan Fully Synthetic Gear Oil 75w/90 API GL4/5 : Size - 5lt

Smith & Allan Fully Synthetic Gear Oil 75w/90 API GL4/5 : Size - 5lt

Smith & Allan
6% Off
9.8
Exceptional
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9.8
Exceptional
Smith & Allan

Smith & Allan Fully Synthetic Gear Oil 75w/90 API GL4/5 : Size - 5lt

6% Off
3
Triax Synergy Gear MAX 75W-90 GL-5 Ultimate Full Synthetic Long Drain Gear Oil for Manual Transmissions, Limited Slip Differentials, Hypoid Gears, Axles, Manual Gearboxes (1 Gallon)
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Triax Synergy Gear MAX 75W-90 GL-5 Ultimate Full Synthetic Long Drain Gear Oil for Manual Transmissions, Limited Slip Differentials, Hypoid Gears, Axles, Manual Gearboxes (1 Gallon)

TRIAX
Why we love it
  • Outstanding wear and load control.
  • Unbeaten shear stability, longevity.
  • Versatile range of applications.
Main Highlights
  • TRIAX Synergy Gear MAX 75W90 is an extreme performance GL-5 Limited Slip gear and differential lubricant
  • 💰 REDUCES OPERATING COSTS – Long service life, oxidation resistance and stable additive system help minimise downtime and lubricant replacement frequency.
Show More
9.6
Superb
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9.6
Superb
TRIAX

Triax Synergy Gear MAX 75W-90 GL-5 Ultimate Full Synthetic Long Drain Gear Oil for Manual Transmissions, Limited Slip Differentials, Hypoid Gears, Axles, Manual Gearboxes (1 Gallon)

Why we love it
  • Outstanding wear and load control.
  • Unbeaten shear stability, longevity.
  • Versatile range of applications.
Main Highlights
  • TRIAX Synergy Gear MAX 75W90 is an extreme performance GL-5 Limited Slip gear and differential lubricant
  • 💰 REDUCES OPERATING COSTS – Long service life, oxidation resistance and stable additive system help minimise downtime and lubricant replacement frequency.
Show More
4
Vartrans Syntho 75w90 GL5 Fully Synthetic Transmission Oil - 20Ltrs (1 PC) - Gearbox - Differential - Hybrid

Vartrans Syntho 75w90 GL5 Fully Synthetic Transmission Oil - 20Ltrs (1 PC) - Gearbox - Differential - Hybrid

Varol
Why we love it
  • Perfect for synchromesh gearboxes.
  • Streamlines API GL-5 and GL-4.
  • Exceptional temperature performance.
Main Highlights
  • Suitable for synchromesh gear boxes
  • Covers API GL-5 and GL-4 offering rationalisation of grades
  • Outstanding low and high temperature performance
Show More
9.5
Superb
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9.5
Superb
Varol

Vartrans Syntho 75w90 GL5 Fully Synthetic Transmission Oil - 20Ltrs (1 PC) - Gearbox - Differential - Hybrid

Why we love it
  • Perfect for synchromesh gearboxes.
  • Streamlines API GL-5 and GL-4.
  • Exceptional temperature performance.
Main Highlights
  • Suitable for synchromesh gear boxes
  • Covers API GL-5 and GL-4 offering rationalisation of grades
  • Outstanding low and high temperature performance
Show More
5
75W-90 Semi Synthetic Gear Differential Oil GL-4 GL-5 20 Litre 20L

75W-90 Semi Synthetic Gear Differential Oil GL-4 GL-5 20 Litre 20L

Smith & Allan
Why we love it
  • Excellent protection against wear.
  • Resistant to harmful oxidation.
  • Outstanding performance in cold.
Main Highlights
  • Excellent anti-wear characteristics
  • Resistant to oxidation
  • Resistant to oxidation
  • Excellent foam control
  • Protection from rust and corrosion
  • Outstanding cold temperature performance
  • Grade rationalisation potential
Show More
9.3
Superb
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9.3
Superb
Smith & Allan

75W-90 Semi Synthetic Gear Differential Oil GL-4 GL-5 20 Litre 20L

Why we love it
  • Excellent protection against wear.
  • Resistant to harmful oxidation.
  • Outstanding performance in cold.
Main Highlights
  • Excellent anti-wear characteristics
  • Resistant to oxidation
  • Resistant to oxidation
  • Excellent foam control
  • Protection from rust and corrosion
  • Outstanding cold temperature performance
  • Grade rationalisation potential
Show More
6
Smith & Allan 75W-90 Semi Synthetic Gear Differential Oil GL-4 GL-5 5 Litre 5L

Smith & Allan 75W-90 Semi Synthetic Gear Differential Oil GL-4 GL-5 5 Litre 5L

Smith & Allan
Why we love it
  • Excellent protection against wear.
  • Resistant to harmful oxidation.
  • Superior cold temperature performance.
Main Highlights
  • Excellent anti-wear characteristics
  • Resistant to oxidation
  • Thermally stable
  • Excellent foam control
  • Protection from rust and corrosion
  • Outstanding cold temperature performance
  • Grade rationalisation potential
Show More
9.2
Superb
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9.2
Superb
Smith & Allan

Smith & Allan 75W-90 Semi Synthetic Gear Differential Oil GL-4 GL-5 5 Litre 5L

Why we love it
  • Excellent protection against wear.
  • Resistant to harmful oxidation.
  • Superior cold temperature performance.
Main Highlights
  • Excellent anti-wear characteristics
  • Resistant to oxidation
  • Thermally stable
  • Excellent foam control
  • Protection from rust and corrosion
  • Outstanding cold temperature performance
  • Grade rationalisation potential
Show More
7
TRIAX Gear Max MT 75W-80 GL-4 - Full Synthetic Manual Transmission Fluid - Gear Box Oil - Compatible with Chrysler MS 9224 - Honda MTF - Toyota Differential (1 Quart/0.946 L)
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TRIAX Gear Max MT 75W-80 GL-4 - Full Synthetic Manual Transmission Fluid - Gear Box Oil - Compatible with Chrysler MS 9224 - Honda MTF - Toyota Differential (1 Quart/0.946 L)

TRIAX
Why we love it
  • Outperforms standard OEM fluid quality.
  • Highly versatile vehicle compatibility.
  • Delivers smooth, noiseless shifting.
Main Highlights
  • FULL SYNTHETIC FORMULA - GL-4 75W-80 manual transmission fluid with advanced PAO and Esters for superior protection and performance.
  • EXCEEDS OEM STANDARDS - Surpasses all OEM standards for 75W80 gearboxes, manual transmissions, differentials, synchros, and transfer cases.
  • YELLOW METAL PROTECTION - Non-reactive sulfurs ensure safety for all brass and bronze components, preventing corrosion or wear.
  • EXTENDED DRAIN INTERVALS - Lasts up to 5x longer than OEM fluid specifications, reducing maintenance and operating costs.
  • ADVANCED DETERGENCY SYSTEM - Features a custom detergency package with friction modifiers, defoamers, and corrosion inhibitors to combat contamination. Offers extreme viscosity stability with a 204 VI Index and -51°C arctic-grade pour point.
  • SMOOTH SHIFTING EXPERIENCE - Eliminates notchy shifting and grinding noise for rapid, smooth, and slip-free gear engagement.
  • WIDE VEHICLE COMPATIBILITY - Approved for Honda, Acura, Toyota, BMW, Audi, Mini, Jeep, Chrysler, Ford, Mercedes-Benz, and more, including BMW X5 transfer cases.
Show More
9.0
Superb
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9.0
Superb
TRIAX

TRIAX Gear Max MT 75W-80 GL-4 - Full Synthetic Manual Transmission Fluid - Gear Box Oil - Compatible with Chrysler MS 9224 - Honda MTF - Toyota Differential (1 Quart/0.946 L)

Why we love it
  • Outperforms standard OEM fluid quality.
  • Highly versatile vehicle compatibility.
  • Delivers smooth, noiseless shifting.
Main Highlights
  • FULL SYNTHETIC FORMULA - GL-4 75W-80 manual transmission fluid with advanced PAO and Esters for superior protection and performance.
  • EXCEEDS OEM STANDARDS - Surpasses all OEM standards for 75W80 gearboxes, manual transmissions, differentials, synchros, and transfer cases.
  • YELLOW METAL PROTECTION - Non-reactive sulfurs ensure safety for all brass and bronze components, preventing corrosion or wear.
  • EXTENDED DRAIN INTERVALS - Lasts up to 5x longer than OEM fluid specifications, reducing maintenance and operating costs.
  • ADVANCED DETERGENCY SYSTEM - Features a custom detergency package with friction modifiers, defoamers, and corrosion inhibitors to combat contamination. Offers extreme viscosity stability with a 204 VI Index and -51°C arctic-grade pour point.
  • SMOOTH SHIFTING EXPERIENCE - Eliminates notchy shifting and grinding noise for rapid, smooth, and slip-free gear engagement.
  • WIDE VEHICLE COMPATIBILITY - Approved for Honda, Acura, Toyota, BMW, Audi, Mini, Jeep, Chrysler, Ford, Mercedes-Benz, and more, including BMW X5 transfer cases.
Show More
8
TotalEnergies TRAXIUM DUAL 9 FE Synthetic 75W90 Transmission Oil API GL-4/5, MT-1, SAE J2360-1 Liter
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TotalEnergies TRAXIUM DUAL 9 FE Synthetic 75W90 Transmission Oil API GL-4/5, MT-1, SAE J2360-1 Liter

TotalEnergies
Why we love it
  • High-quality synthetic formulation.
  • Wide compatibility with approvals.
  • Robust performance in harsh conditions.
Main Highlights
  • Approvals: ARVIN MERITOR 076-N, DAF, IVECO RAM1, IVECO RAS1, MACK GO-J PLUS, MAN 341 TYPE Z2, MAN 342 TYPE S1, MB-APPROVAL 235.8, SCANIA STO 1:1 G, SCANIA STO 2:0 A FS
  • Approvals: VOLVO 97312, ZF TE-ML 02B, ZF TE-ML 05A, ZF TE-ML 12L, ZF TE-ML 12N, ZF TE-ML 16F, ZF TE-ML 17B, ZF TE-ML 19C, ZF TE-ML 21A
  • Compatible: SCANIA STO 1:0
  • Classifications: API GL-4, API GL-5, API MT-1, SAE J2360
  • Traxium dual 9 FE 75W-90 fully synthetic gear oil developed for manual gearboxes, axles and reduction gears.
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8.9
Excellent
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8.9
Excellent
TotalEnergies

TotalEnergies TRAXIUM DUAL 9 FE Synthetic 75W90 Transmission Oil API GL-4/5, MT-1, SAE J2360-1 Liter

Why we love it
  • High-quality synthetic formulation.
  • Wide compatibility with approvals.
  • Robust performance in harsh conditions.
Main Highlights
  • Approvals: ARVIN MERITOR 076-N, DAF, IVECO RAM1, IVECO RAS1, MACK GO-J PLUS, MAN 341 TYPE Z2, MAN 342 TYPE S1, MB-APPROVAL 235.8, SCANIA STO 1:1 G, SCANIA STO 2:0 A FS
  • Approvals: VOLVO 97312, ZF TE-ML 02B, ZF TE-ML 05A, ZF TE-ML 12L, ZF TE-ML 12N, ZF TE-ML 16F, ZF TE-ML 17B, ZF TE-ML 19C, ZF TE-ML 21A
  • Compatible: SCANIA STO 1:0
  • Classifications: API GL-4, API GL-5, API MT-1, SAE J2360
  • Traxium dual 9 FE 75W-90 fully synthetic gear oil developed for manual gearboxes, axles and reduction gears.
Show More
9
Motul Gearbox Oil Gear - 1LTR

Motul Gearbox Oil Gear - 1LTR

Motul
Why we love it
  • Extreme pressure lubrication benefits.
  • High-temperature wear protection ensured.
  • Reduced noise for smoother shifts.
Main Highlights
  • 100% synthetic, extreme pressure lubricant.
  • anti wear protection and resistance at high temperature.
  • 0% shear loss, Unshearable oil film in extreme conditions, decreases friction and wear.
  • Reduce transmission noise. Easier gear shifting when the gearbox is cold.
  • Suitable for any type of seal and yellow material. Anti-corrosion, Anti-foam.
Show More
8.7
Excellent
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8.7
Excellent
Motul

Motul Gearbox Oil Gear - 1LTR

Why we love it
  • Extreme pressure lubrication benefits.
  • High-temperature wear protection ensured.
  • Reduced noise for smoother shifts.
Main Highlights
  • 100% synthetic, extreme pressure lubricant.
  • anti wear protection and resistance at high temperature.
  • 0% shear loss, Unshearable oil film in extreme conditions, decreases friction and wear.
  • Reduce transmission noise. Easier gear shifting when the gearbox is cold.
  • Suitable for any type of seal and yellow material. Anti-corrosion, Anti-foam.
Show More
10
Castrol Transmax Manual Multivehicle 75W-90 1L
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Castrol Transmax Manual Multivehicle 75W-90 1L

Castrol
Why we love it
  • Longer transmission life guaranteed.
  • Versatile low temperature operability.
  • Provides smoother, protected drive.
Main Highlights
  • Suitable for: API GL-4, MB-Approval 235.72, Meets Ford WSD-M2C200-C,*SAE Class according to J306 pre 1998
  • Castrol TRANSMAX Manual Multivehicle 75W-90, formulated with Smooth Drive Technology, is a fully synthetic transmission fluid recommended for most passenger car manual transmissions. Its superior technology enables longer transmission life.
  • Used successfully as a problem solver for low temperature shiftability issues and in the manual transmissions of a number of manufacturers as factory fill.
  • Castrol TRANSMAX with Smooth Drive Technology has active control molecules that automatically adjust their friction level under changing pressures and speed, delivering a smoother drive for longer and enhanced protection. That’s why, 2 out of every 3 major vehicle manufacturers choose Castrol transmission fluids as part of their factory fill.
  • Type: Fully Synthetic
Show More
8.7
Excellent
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8.7
Excellent
Castrol

Castrol Transmax Manual Multivehicle 75W-90 1L

Why we love it
  • Longer transmission life guaranteed.
  • Versatile low temperature operability.
  • Provides smoother, protected drive.
Main Highlights
  • Suitable for: API GL-4, MB-Approval 235.72, Meets Ford WSD-M2C200-C,*SAE Class according to J306 pre 1998
  • Castrol TRANSMAX Manual Multivehicle 75W-90, formulated with Smooth Drive Technology, is a fully synthetic transmission fluid recommended for most passenger car manual transmissions. Its superior technology enables longer transmission life.
  • Used successfully as a problem solver for low temperature shiftability issues and in the manual transmissions of a number of manufacturers as factory fill.
  • Castrol TRANSMAX with Smooth Drive Technology has active control molecules that automatically adjust their friction level under changing pressures and speed, delivering a smoother drive for longer and enhanced protection. That’s why, 2 out of every 3 major vehicle manufacturers choose Castrol transmission fluids as part of their factory fill.
  • Type: Fully Synthetic
Show More

We scanned 1857 products

We reviewed these offers relevant to the 75w90 Gl4 Gearbox Oil within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like Castrol, Smith & Allan, TRIAX, Varol, TotalEnergies, Motul, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.
For the best 75w90 Gl4 Gearbox Oil in the market, we considered we took a deep dive into 9286 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

  • The clear winner of our analysis is Comma SXGL45L Semi-Synthetic Gear Oil, 5 Liters. We love many things about this product by Castrol. What sets it apart from the competition is Superior protection for gearboxes. , Ideal for modern transmissions. , Trusted by leading manufacturers.
  • The best value product for most shoppers and where user satisfaction is continuously the highest is Smith & Allan Fully Synthetic Gear Oil 75w/90 API GL4/5 : Size - 5lt by Smith & Allan based on online reviews by bloggers, experts and online shoppers.
  • The biggest bargain at the moment for 75w90 Gl4 Gearbox Oil and the best cost-to-value ratio is Comma SXGL45L Semi-Synthetic Gear Oil, 5 Litersat Castrol with a 17% discount.
  • Our list of the best 75w90 Gl4 Gearbox Oil is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.