Redline MT-90 Manual Trans Fluid


15 reviews

This product is currently out of stock.

Transmission & Drivetrain - Redline MT-90 Manual Trans Fluid
Transmission & Drivetrain - Redline MT-90 Manual Trans Fluid

This is a great upgrade for your manual trans! This is one of the easiest "mods" to do for your trans. Drain old fluid, pour this in. The trans will shift quicker, feel less notchy, less wear on its components, etc!

  • Appropriate coefficient of friction for most manual transmission synchronizers (other's synthetic gear oils are often too slippery for proper synchro engagement)
  • Red Line offers lubricants to pinpoint nearly every transmission application
  • MT-90 is not for use in differentials with hypoid gears
  • Excellent gear and synchro protection, balanced slipperiness for easier shifting in cold climates
  • Excellent for high- and low-mile transmissions
  • Compatible with petroleums and other synthetics
  • 75W90 GL-4 gear oil (similar to SAE 5W40/10W40 engine oil viscosity)
  • Offers quicker shifts, perfect synchronizer coefficient of friction
  • 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
  • Eliminates notchy shifting, even when cold
  • Satisfies the gear oil viscosity requirements of 75W, 80W and motor oil viscosities of SAE 40, 10W40, and 15W40
  • Recommended for GL-1, GL-3, and GL-4 applications, as well as where most special synchromesh fluids are specified

    Most manual transmissions take a little over 2 quarts of fluid.

The price is per bottle.


F35 takes 1.8 bottles
F40 takes 2.8 bottles

Transmission & Drivetrain - Redline MT-90 Manual Trans Fluid
Transmission & Drivetrain - Redline MT-90 Manual Trans Fluid
Customer Reviews
4.9 Based on 15 Reviews
Write a Review Ask a Question
  • Reviews
  • Questions
Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
  • axles
  • transmission
  • gear oil
  • Car shifts
  • shifting
  • noice
Travis T.
United States United States
Can't beat the price

Can't be the price and good stuff good website to go to and they get at to you fast

Cristian C.
United States United States
Super oil

Smooth shifting, less noice from the transmission

Omar M.
United States United States
Better than before

Installed new axles along with new gear oil. Car shifts and runs quieter.

Joseph H.
United States United States
Redline MT90

Great stuff! Definitely a high quality oil.

Rogelio O.
Awesome Sauce!!

Before i did the oil change i had some issues with smooth with oil change its smooth like butter...rides real smooth:ok_hand: