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75w90 Gear Oil

Item 383733
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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation

      Features

      • Fully Synthetic Formula
      • Contains Friction Modifiers
      • High Natural Viscosity Index (VI)
      • Protects Against Wear
      • 75w90 Weight
      • 7.5" and 8.8" Ford Rear Ends Require 3 Quarts
      • One Quart Bottle - Sold Individually

      Description

      Fully Synthetic Formula. Red Line's 75W90 Fully-Synthetic Gear Oil is the perfect oil for your daily driven performance vehicle. Red Line's formula is created from polyol ester base stocks and friction modifiers that provide excellent lubrication. This helps to decrease operating temperatures by reducing the sliding friction of the hypoid gears.

      Contains Friction Modifier. Unlike other brands of gear oil, Red Line's formulation contains friction modifiers suitable for use with clutch or cone type limited slip differentials - for most LSDs applications, no additional friction modifiers are required.

      Superior Protection. Red Line synthetic gear oil features a high natural viscosity index (VI) for a relatively constant viscosity and film thickness that coats all differential components to provide excellent wear and friction protection across a wide range of operating conditions and temperatures.

      Application. Red Line Synthetic 75W90 weight gear oil is recommended for use in 1979 to 2017 Mustangs, including LX, V6, GT, Bullitt, Mach 1, SVT Cobra, Boss and Shelby GT500 models. Check your Mustang's owner's manual for the correct weight for your application. Sold individually in one quart bottles.

      Application Note. Three (3) quarts of gear oil are required to fill a 7.5" or 8.8" Ford rear end.

      Fitment: 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 Details

      MPN# 57904

      CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

      4.8

      Customer Reviews (6)

      Write a Review

      Ratings Summary

      4.8 out of 5 overall rating from 6 customers




      • April 21, 2019

        5 2016 GT - WhiteStang

        Maintenance

        Great replacement for the gear oil for freshening up and keeping up with routine maintenance I definitely recommend this product

        Helpful (0)
      • June 07, 2018

        5 2013 GT500 - DeanD

        Quieter rear end

        I purchased the car from a dealer and was able track down the prior owner. He had not changed the gear oil. I drained and replaced the oil with Redline based on recommendations from others, and added the proper Ford friction additive and it seems to have quieted down.

        Helpful (11)
      • May 11, 2018

        5 2001 GT - Peej

        Red Line 75W90 Gear Oil

        Redline oil products are great. They hold up and extend the time before typical fluid changes are required. They stay cleaner and don't break down like other synthetic oils.

        Helpful (11)
      • July 04, 2017

        5 2011 GT - pugboy75

        Holds up in extreme use!

        I am using Red Line gear oil for road course including SCCA racing and track days in multiple vehicles. These conditions require the oil to hold up for anywhere from 20 minutes to an hour of punishing use. After having poor results with other diff fluids in the past, I switched to Red Line gear oil in all my cars and never had a failure, an overheat, or any issue whatsoever.

        Helpful (12)
      • March 03, 2017

        4 1988 LX - ScottW

        Sorry but this went in my BMW

        Yes this went in my BMW but wanted to try it before I put it in my mustang they take the same fluids for tranny and rear end

        Helpful (11)
      • May 08, 2016

        5 2006 V6 - RSM54

        No Gear Whine.

        After swapping my engine oil to Red Line from a performance brand with great results I decided to swap the axle fluid as well. Gears turn smoothly with no gear noise. I would highly recommend Red Line if your looking for great protection and product.

        Helpful (12)

      Questions & Answers (2 answers)

      2 Top Rated Questions

      Can I use this red line oil in my manual transmission

      • The Red Line 75w90 Gear Oil can be used in manual transmissions that call for 75w90 gear oil. Keep in mind that the T5, T45, TR3650, T56, TR6060, and MT-8T transmissions used in the Mustangs we carry parts for call for ATF, and not gear oil, and the use of gear oil will cause issues. 1984 and Older T5 Transmissions will use gear oil as they are the old T% before the World Class T5 was released for the 85 Mustang.

      Helpful (0)

      Even though this product contains friction modifier, do I still need to add additional friction modifier when I change the gear oil in the rear end of my Boss?

      • Hi, You should still use a 4oz Ford Performance Friction Modifier Item #50377 with this Red Line 75w90 Gear Oil the additional modifier will keep the rear end nice and quiet.

      Helpful (0)
      Post Your Question

      Installation & What's in the Box

      What's in the Box

      • (1) one quart bottle

      Tech Specs

      Will It Fit My Mustang

      • Boss 302 - 12, 13
      • Bullitt - 01, 08, 09, 19, 20
      • Cobra - 93, 94, 95, 96, 97, 98, 99, 01, 03, 04
      • Cobra R - 93, 95, 00
      • EcoBoost - 15, 16, 17, 18, 19, 20
      • GT - 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20
      • GT350 - 15, 16, 17, 18, 19, 20
      • GT350R - 15, 16, 17, 18, 19, 20
      • GT500 - 07, 08, 09, 10, 11, 12, 13, 14, 20
      • LX - 87, 88, 89, 90, 91, 92, 93
      • Mach 1 - 03, 04
      • Other - 79, 80, 81, 82, 83, 84, 85, 86
      • V6 - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17

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