Manual Synchromesh Transmission Fluid 5W-30
Formulated for maximum protection in syncromesh transmissions
The ultimate in gear and bearing protection & outperforms motor oils in manual transmissions.
Lots of drivers are going to this in their imports over the suggested ATF. Runs cooler and shifts smoother. Mainly because of its film strength based on 5+ years of formulating. Our walk in customers say it’s the one being suggested in numerous forums.
Designed to minimize gear wear while providing smooth synchromesh shifting performance in certain manual transmissions and transaxles used by GM* and Chrysler.* Provides excellent performance at temperatures from -40°F (-40°C) to 300°F (149°C).
AMSOIL Synthetic Manual Synchromesh Transmission Fluid is a premium-quality synthetic lubricant designed to surpass the most demanding lubrication requirements of manual transmissions and transaxles where non-extreme-pressure fluids are used.
AMSOIL Synthetic Manual Synchromesh Transmission Fluid protects gears and bearings in extreme temperatures. It outperforms conventional oils and delivers outstanding performance from -40°F to 300°F, and it maximizes energy efficiency and resists the effects of heat, oxidation, sludge and varnish deposits.
Unlike its mineral oil counterparts, AMSOIL Synthetic Manual Synchromesh Transmission Fluid prevents the thinning effects of mechanical shear for stable viscosity, superior film strength and excellent anti-wear performance. It protects against corrosion, keeps seals soft for long life, and is compatible with brass synchros for smooth synchromesh shift quality.
Now if your vehicle is calling for a GL-4 manual transmission fluid then please select the AMSOIL MTG 75w-90.
Ideal Synchromesh Fluid for Many General Motors, Chrysler, Honda and Other Vehicles
AMSOIL Synthetic Manual Synchromesh Transmission Fluid is a higher quality, lower cost replacement for multiple vehicle manufacturer-branded products. This premium synthetic formulation provides enhanced anti-wear protection and lasts longer in service. AMSOIL Synthetic Manual Synchromesh Transmission Fluid exceeds the performance requirements of both manual transmissions and transaxles.
Excellent Transmission Gear Oil for Service Centers
AMSOIL Synthetic Manual Synchromesh Transmission Fluid is a versatile transmission lubricant. It reduces inventory needs, is readily available and is cost-effective compared to vehicle manufacturer-branded products.
Amsoil Synchromesh Performance Features
Reduces friction, heat and wear
Superior high-temperature stability
Resists heat, oxidation, acid buildup and varnish
Improves cold-weather shifting
Applications
Use in applications requiring a 75W-85, 75W-90 or 80W-90
• API GL-4
• Chrysler* MS-9070
• ZF* TE-ML 02b, 17a
• MAN* 341-Z2 (formerly MAN 341 ML)
• MB 235.5
Recommended for automotive and light-truck applications that require synchromesh transmission fluid. Applications include manual transmissions and transaxles such as New Venture* NV T350, NV 1500, NV 2550, NV 3500, NV 3550, NV 5600, and Tremec* T4, T5, T18, T56, T176, TKO500, TKO600, TR 3450 and TR 3550.
Replaces MTF-94 fluid for Land Rover,* MG* and Mini Cooper.* Replaces Honda Genuine MTF fluid for manual transaxles and Shell* or Texaco MTX fluid.
Not for use in engines, wet-clutch applications, hypoid rear axles or limited-slip applications.
Specifications include:
Specifications
GM 9985648
GM 9986105
GM 9985535
Chrysler MS-9224
Chrysler MS-9417
Part Numbers
GM 12345349 or 12345577
GM 12377916
GM 1052931
Chrysler 4874464
Chrysler 4874465
Service Life
Recommended for 50,000-mile service intervals or longer (up to 150,000 miles) as indicated in the owner’s manual.
AMSOIL PRODUCT WARRANTY
AMSOIL products are backed by a Limited Liability Warranty. For complete information visit www.amsoil.com/warranty.aspx.
HEALTH & SAFETY
This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Safety Data Sheet (SDS). An SDS is available via the Internet at www.amsoil.com or upon request at (715) 392-7101. Keep Out of Reach of Children. Recycle used oil and bottle.
Synchromesh 5W-30 Gear Oil Product Reviews
Best MTF for any Honda manual transmission
By Tony, a Verified Buyer on January 23, 2025
This MTF was far better than the OEM MTF fluid in my 6 spd manual transmission.
Very High Quality Manual Transmission Fluid
By ERIC, a Verified Buyer from Oakland, California on December 17, 2024
This manual transmission fluid will immediately improve your shift smoothness, and definitely protect your most important connection to the ground from your vehicle. Can’t buy any better at any price.
Very smooth shift
By QUINCY, a Verified Buyer on December 14, 2024
I used this product on my 8th gen Honda Civic Si. Very smooth shift and happy with this product. Lubs the synchros well.
90,000 miles like new
By ROBERT R., a Verified Buyer on November 18, 2024
By CLIFF, a Verified Buyer from Western Canada on October 29, 2024
Original owner of 2008 Honda Civic SI and made the change to AMSOIL synthetic at the first oil and filter interval for both engine and transmission. 16 years later and still still a daily driver with zero issues in the power-train. From -40 to +40 centigrade this synthetic oil has been ideal in our harsh conditions. I can confidently recommend this to anyone looking for a superior synthetic lubricant in their motor vehicle.
Best of the best
By Samuel, a Verified Buyer from Texas on July 28, 2022
Purchased the Synchromesh MT fluid for my 2020 Civic Type R to help alleviate the 2nd gear grind. Product arrived in just 3 days. Replaced OEM MT Fluid with this stuff and haven’t had a problem with the 2nd gear grind since.
Only fluid I would use for my nv5600
By ANDREW, a Verified Buyer from Prundale CA on June 09, 2022
I’m sure this is the best to be bought. Too bad the company building my reman transmissions can’t produce products this good. 2 uncorrectly built trannys in a rowand won’t surprise me if this third one goes. Ive have had to buy this fluid 3 times in the last year for a whopping 1800miles. Gets a little pricey paying for someone else’s failures. Anyways after a little break time on this transmission I will be back here buying another 8 quarts and will always use amsoil.
Nv3550 shifts great now
By Bill, a Verified Buyer on August 18, 2022
In my 02 Jeep TJ I have tried valvoline synchromesh, royal purple, redline, penzoil. Amsoil synchromesh has given me the best shifting. First thing in the morning or after driving for an hour, shifts great.
Better than OEM
By JOSEPH, a Verified Buyer from Poughquag NY on April 11, 2022
I’ve been using Amsoil products for more than 15 years in my vehicles, and I trust that Amsoil fluid is even better than the Honda OEM fluid in my wife’s 2001 Honda CRV. With over 230k miles it still shifts perfectly. Can’t go wrong with Amsoil!
2020 Honda Civic Si
By RYAN, a Verified Buyer from Florida on May 07, 2022
Our Si had 25,000 miles on it. Wanted to do the transmission service. Looked into different choices. Read tons of positive reviews on the AMSOIL Trans fluid that were very positive on other websites, particularly Civic forums. We gave it a shot. Considering it could be a placebo effect, I immediately noticed better shifting. If you are familiar with the little characteristics of your respective manual shifter, you might want to consider giving this a shot. I will not go back to the stock fluid for it. The Si was fun to drive to begin with but a few of the shifts got finicky. This seemed to resolve each one immediately, and made it more enjoyable to drive.
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