Red Line
SKU: RED-50304

75W90 MT-90 GL-4 Gear Oil (1 Quart) - Red Line 50304

A4 Quattro, A5 Quattro

Recommended for GL-1, GL-3, and GL-4 applications



Available
In Stock
MAP
Price each: $25.59
Core charges are assigned to parts that have reusable components by manufacturers to encourage the return of the used units. Once you return the old part you will be refunded for your core charge, details regarding the return will be emailed to you once you place the order. Note: The customer is responsible for the cost of return shipping.
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Description

Details

SKU:
RED-50304
FCP Euro ID:
63442
GTIN / UPC:
083522503044
Made in:
United States
Quality:
Performance

OE Numbers

50304

MFG Numbers

50304

Product Information

Recommended for GL-1, GL-3, and GL-4 applications

This 75W90 GL-4 gear oil (similar to 5W40/10W40 engine oil viscosity) is popular in many European applications. This fluid offers quicker shifts along witha perfect synchronizer coefficient of friction. It is also safe for brass synchros as it lacks the reactive sulfurs that are found in most GL-5 oils.

This gear oil also offers high performance gear protection and along with longer synchro life. Notchy shifting is eliminated especially in the cold. Satisifies the gear oil viscosity requirements of 75W, 80W and motor oil viscosities of SAE 40, 10W40, and 15W40.

About Red Line gear oil for manual transmissions:

  • 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
  • MTL, MT-85 & MT-90 are 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
Manual Transmission Fluid

Manual transmission fluid is a specialized lubricant used in a manual gearbox to facilitate smooth gear shifting by reducing friction between the moving parts; when it fails, common symptoms include difficulty shifting gears, gear slipping, grinding noises, rough shifting, fluid leaks, and a burning smell, often indicating excessive wear or contamination within the transmission.

Manual Transmission Fluid Failure Symptoms
  • Difficult shifting: Gears may feel hard to engage or require excessive force to shift
  • Gear slipping: The engine RPMs increase without the car accelerating properly, indicating the gears are not fully engaging
  • Grinding noises: A grinding sound when shifting gears, often a sign of excessive wear on gear teeth

About Red Line

Founded in 1979 by president Tim Kerrigan, Redline has grown to manufacture more than 100 high quality products to include motor oils, gear oils, assembly lubes and fuel additives. Today the company is based out of Benicia, California with a well known reputation from racers and enthusiasts for creating high quality durable products. From their highly popular water wetter to their superior ester base oil, Redline is continuously a superior source for lubrication across the globe.

Fits These Cars

Audi A5 Quattro

  • 2008 Audi A5 Quattro Manual Transmission Fluid
    Manual AWD Coupe 3.2L V6 CALA Gas
  • 2009 Audi A5 Quattro Manual Transmission Fluid
    Manual AWD Coupe 3.2L V6 CALA Gas
  • 2010 Audi A5 Quattro Manual Transmission Fluid
    Manual AWD Coupe 2.0L L4 CAEB Gas
  • 2010 Audi A5 Quattro Manual Transmission Fluid
    Manual AWD Coupe 3.2L V6 CALA Gas
  • 2011 Audi A5 Quattro Manual Transmission Fluid
    Manual AWD Coupe 2.0L L4 CAEB Gas
  • 2012 Audi A5 Quattro Manual Transmission Fluid
    Manual AWD Coupe 2.0L L4 CAEB Gas
  • 2013 Audi A5 Quattro Manual Transmission Fluid
    Manual AWD Coupe 2.0L L4 CAEB Gas
  • 2013 Audi A5 Quattro Manual Transmission Fluid
    Manual AWD Coupe 2.0L L4 CPMA Flex
  • 2014 Audi A5 Quattro Manual Transmission Fluid
    Manual AWD Coupe 2.0L L4 CAED Gas
  • 2014 Audi A5 Quattro Manual Transmission Fluid
    Manual AWD Coupe 2.0L L4 CPMB Flex
  • 2015 Audi A5 Quattro Premium Manual Transmission Fluid
    Manual AWD Convertible 2.0L L4 CAED Gas
  • 2015 Audi A5 Quattro Premium Manual Transmission Fluid
    Manual AWD Coupe 2.0L L4 CAED Gas
  • 2015 Audi A5 Quattro Premium Manual Transmission Fluid
    Manual AWD Convertible 2.0L L4 CPMB Flex
  • 2015 Audi A5 Quattro Premium Manual Transmission Fluid
    Manual AWD Coupe 2.0L L4 CPMB Flex
  • 2015 Audi A5 Quattro Premium Plus Manual Transmission Fluid
    Manual AWD Convertible 2.0L L4 CAED Gas
  • 2015 Audi A5 Quattro Premium Plus Manual Transmission Fluid
    Manual AWD Coupe 2.0L L4 CAED Gas
  • 2015 Audi A5 Quattro Premium Plus Manual Transmission Fluid
    Manual AWD Convertible 2.0L L4 CPMB Flex
  • 2015 Audi A5 Quattro Premium Plus Manual Transmission Fluid
    Manual AWD Coupe 2.0L L4 CPMB Flex
  • 2015 Audi A5 Quattro Prestige Manual Transmission Fluid
    Manual AWD Convertible 2.0L L4 CAED Gas
  • 2015 Audi A5 Quattro Prestige Manual Transmission Fluid
    Manual AWD Coupe 2.0L L4 CAED Gas
  • 2015 Audi A5 Quattro Prestige Manual Transmission Fluid
    Manual AWD Convertible 2.0L L4 CPMB Flex
  • 2015 Audi A5 Quattro Prestige Manual Transmission Fluid
    Manual AWD Coupe 2.0L L4 CPMB Flex
  • 2016 Audi A5 Quattro Premium Manual Transmission Fluid
    Manual AWD Convertible 2.0L L4 CAED Gas
  • 2016 Audi A5 Quattro Premium Manual Transmission Fluid
    Manual AWD Coupe 2.0L L4 CAED Gas
  • 2016 Audi A5 Quattro Premium Manual Transmission Fluid
    Manual AWD Convertible 2.0L L4 CPMB Flex
  • 2016 Audi A5 Quattro Premium Manual Transmission Fluid
    Manual AWD Coupe 2.0L L4 CPMB Flex
  • 2016 Audi A5 Quattro Premium Plus Manual Transmission Fluid
    Manual AWD Convertible 2.0L L4 CAED Gas
  • 2016 Audi A5 Quattro Premium Plus Manual Transmission Fluid
    Manual AWD Coupe 2.0L L4 CAED Gas
  • 2016 Audi A5 Quattro Premium Plus Manual Transmission Fluid
    Manual AWD Convertible 2.0L L4 CPMB Flex
  • 2016 Audi A5 Quattro Premium Plus Manual Transmission Fluid
    Manual AWD Coupe 2.0L L4 CPMB Flex
  • 2017 Audi A5 Quattro Sport Manual Transmission Fluid
    Manual AWD Convertible 2.0L L4 CAED Gas
  • 2017 Audi A5 Quattro Sport Manual Transmission Fluid
    Manual AWD Coupe 2.0L L4 CAED Gas
  • 2017 Audi A5 Quattro Sport Manual Transmission Fluid
    Manual AWD Convertible 2.0L L4 CPMB Flex
  • 2017 Audi A5 Quattro Sport Manual Transmission Fluid
    Manual AWD Coupe 2.0L L4 CPMB Flex

Audi A4 Quattro

  • 2009 Audi A4 Quattro Manual Transmission Fluid
    Manual AWD Sedan 2.0L L4 CAEB Gas
  • 2009 Audi A4 Quattro Manual Transmission Fluid
    Manual AWD Sedan 3.2L V6 CALA Gas
  • 2010 Audi A4 Quattro Manual Transmission Fluid
    Manual AWD Sedan 2.0L L4 CAEB Gas
  • 2011 Audi A4 Quattro Manual Transmission Fluid
    Manual AWD Sedan 2.0L L4 CAEB Gas
  • 2012 Audi A4 Quattro Manual Transmission Fluid
    Manual AWD Sedan 2.0L L4 CAEB Gas
  • 2013 Audi A4 Quattro Manual Transmission Fluid
    Manual AWD Sedan 2.0L L4 CAEB Gas
  • 2013 Audi A4 Quattro Manual Transmission Fluid
    Manual AWD Sedan 2.0L L4 CPMA Flex
  • 2014 Audi A4 Quattro Manual Transmission Fluid
    Manual AWD Sedan 2.0L L4 CAED Gas
  • 2014 Audi A4 Quattro Manual Transmission Fluid
    Manual AWD Sedan 2.0L L4 CPMB Flex
  • 2015 Audi A4 Quattro Premium Manual Transmission Fluid
    Manual AWD Sedan 2.0L L4 CAED Gas
  • 2015 Audi A4 Quattro Premium Manual Transmission Fluid
    Manual AWD Sedan 2.0L L4 CPMB Flex
  • 2015 Audi A4 Quattro Premium Plus Manual Transmission Fluid
    Manual AWD Sedan 2.0L L4 CAED Gas
  • 2015 Audi A4 Quattro Premium Plus Manual Transmission Fluid
    Manual AWD Sedan 2.0L L4 CPMB Flex
  • 2015 Audi A4 Quattro Prestige Manual Transmission Fluid
    Manual AWD Sedan 2.0L L4 CAED Gas
  • 2015 Audi A4 Quattro Prestige Manual Transmission Fluid
    Manual AWD Sedan 2.0L L4 CPMB Flex
  • 2016 Audi A4 Quattro Premium Manual Transmission Fluid
    Manual AWD Sedan 2.0L L4 CAED Gas
  • 2016 Audi A4 Quattro Premium Manual Transmission Fluid
    Manual AWD Sedan 2.0L L4 CPMB Flex
  • 2016 Audi A4 Quattro Premium Plus Manual Transmission Fluid
    Manual AWD Sedan 2.0L L4 CAED Gas
  • 2016 Audi A4 Quattro Premium Plus Manual Transmission Fluid
    Manual AWD Sedan 2.0L L4 CPMB Flex

Product Reviews

6 Reviews

5.0
Average rating
Leave a review
Matthew
on Sun, May 19 at 02:50AM
Great condition
Drained old fluid on my 88' Porsche 944 S transaxle with this new fluid. According to other people in the forums and other groups, they said no problem occurred when they used this type of gear oil
JohnAce S.
on Thu, Oct 07 at 02:08PM
Great gear oil.
Transmission felt great and smooth after transmission flush.
Steve
on Tue, Jun 16 at 04:12AM
great product worked great on manual trans Volvo 850
I initially would have sticking shifting when it was cold, but it went away after car warmed up. That all got fixed after drain/fill with new Redline trans fluid, aka gear oil. This Redline worked great and breathed a nice new smoothness back into the shifting. I ordered from FCP based off the reviews for GL4 rated oil and everything around town was GL4-5 combo so I didnt chance it there.
Jim
on Tue, Nov 04 at 12:34PM
Everywhere I look this oil is highly rated for my transmission. It suffers from "5th gear pop-out" supposedly caused by a design flaw in 1991-1994 Sentras with the FS31R5, 5 speed tranny. I'm too destitute to be able to get it fixed and I don't have the shop space to do it myself (otherwise I would.) But it occurred to me that part of the problem may have to do with having a "quick-change oil" shop top off the tranny with "whatever oil" over the course of two years and a leaking seal that I just ignored. That off-oil may have heightened the problem. Now that I have replaced the seals, this is not to say that just putting the best, correct oil in is going to fix it, but like Bugs Bunny says, "It couldn't hoit!"
Dennis76
on Wed, Apr 24 at 08:32AM
Great tranny fluid!
Changed out oem manual tranny fluid for redline. Totally smooth gear change, especially in the cold start mornings. Will not fade out like oem fluid did with engine mods & hard shifting.
Dennis76
on Wed, Apr 24 at 08:31AM
Great tranny fluid!
Changed out oem manual tranny fluid for redline. Totally smooth gear change, especially in the cold start mornings. Will not fade out like oem fluid did with engine mods & hard shifting.

Questions & Answers

Ask a question
Question Posted by a customer
I want to know how much of this stuff I should buy for my friend's 2000 Audi TT with the 5 speed manual FWD? The VIN is TRUTC28NY4Y1001096.
Answer (Posted by FCP Euro Products Team)
You will need to purchase 3 liters (Capacity 2.3-2.6 liters or 2.4-2.7 quarts).

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