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Royal Purple Max Gear 75w140 Gear Oil

40 Reviews
Our Price

$19.99

  • Item #45006
  • MPN# 1301

  • Market Price $24.99
  • You Save 20% ($5.00)
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Features
  • Fully synthetic
  • Friction modifier included
  • Protects against wear
  • Reduces gear whine
  • 75w140 Weight
  • 8.8" Ford rear ends require 3 quarts
  • For 1979 to 2014 Mustangs
Description
Pure Performance. Maximize performance from your Mustang's drivetrain with Royal Purple Max Gear oil. This fully synthetic oil is the perfect compliment to new gears, lubricating better and ensuring your differential keeps working its best whether it has gone a thousand miles or a hundred thousand.

Protect Your Investment. Made with Royal Purple's innovative Synslide® additive, Max Gear oil is perfect for upgrades or routine service. It's the gear oil of choice for greater wear protection and lower temperatures for every car, from daily drivers to track-day toys. It prevents corrosion and meets all warranty requirements, so adding Royal Purple Max Gear oil is great for peace of mind when it comes to your Pony.

Includes Friction Modifier. Unlike other oils, all viscosities of Max-Gear® are formulated with hypoid friction modifiers necessary for use in clutch or cone type differentials. No additional additives are necessary.

Application. Royal Purple Max Gear 75w140 weight oil is recommended for use in 1979 to 2014 Mustangs and is compatible with other oils. Three (3) quarts of gear oil are required to fill a 8.8" Ford rear end.

Mustang 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 Details

What's in the Box
  • (1) one quart bottle
Installation Info
Fitment
  • Boss 302 - 12, 13
  • Foxbody - 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93
  • Mach 1 - 03, 04
  • V6 - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14
  • Bullitt - 01, 08, 09
  • Cobra - 94, 95, 96, 97, 98, 99, 01, 03, 04
  • GT - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14
  • GT500 - 07, 08, 09, 10, 11, 12

Most Helpful Reviews View All

Overall Rating 4.9/5 Write a Review
5/5

Top 1 Contributor

Motion Lotion

I have two words for you " ROYAL PURPLE ". It's a no brain'r these guys wrote the book on Performance Lubricants. Don't waste you time looking any where else. Do it once, Do it right, Do it Royal Purple,

Read More
Helpful (10) (0)

5/5
Awesome Product

Put this in the rear differential of my 2006 mustang V6, also put the synchromax in my transmission, along with Valvoline SynTech in the engine. At cruising speed, can't even hear or feel ANY gear noise.

Read More
Helpful (10) (1)

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Q & A (1 Questions, 3 Answers) Ask a Question

Is a Friction modifier really needed? I have heard varying opinions on the subject. I know it says it has all modifiers necessary already added, but some folks have told me that they still add it. I have a 2006 v6 that I'll be swapping an 8.8" rear w/4.10s into. I just want to be sure I take all of the necessary precautions to ensure that my almost new take off rear has a long life. Thanks!

ToplessStang Year: 2006 Model: V6

Question Resolved
Good Question (0) (0)
  • The friction modifier needed is already added to this Royal Purple Gear Oil. You don't need to add more modifier for it to work properly. That said, it can not hurt your rear by adding some additional modifier. So, it's not necessary to add more but you can for added piece of mind if you wish to. Hope this helps!

    Helpful (5) (0)

    Best Answer

    LisaS Year: 1992 Model: GT

Show 2 more answers

Reviews (40) Write a Review

  • 5 Stars .92 92%
  • 4 Stars .08 8%
  • 3 Stars 0 0%
  • 2 Stars 0 0%
  • 1 Stars 0 0%
4.9

out of 5 stars

40 Customers Recommend this Product

Installation Time:Full Day

Installation Cost:$100-$250

  • Performance Gain: 4.65 4.7/5
  • Fit: 4.904762 4.9/5
  • Bang For Your Buck: 4.809524 4.8/5
Filter By Sort By
  • 5/5 Yes, I recommend this product

    February 18, 2012

    Motion Lotion

    I have two words for you " ROYAL PURPLE ". It's a no brain'r these guys wrote the book on Performance Lubricants. Don't waste you time looking any where else. Do it once, Do it right, Do it Royal Purple, Case Closed!

    Top 1 Contributor

    fasteddie64

    Year: 2007 Model: V6 Driving Style: Street / Strip 'Stangs I have owned: 3

    Helpful (10) (0)

  • 5/5 Yes, I recommend this product

    July 16, 2010

    Awesome Product

    Put this in the rear differential of my 2006 mustang V6, also put the synchromax in my transmission, along with Valvoline SynTech in the engine. At cruising speed, can't even hear or feel ANY gear noise. Full throttle pulls feel velvet smooth, can't believe how good this product is!

    Chris

    Year: 2006 Model: V6

    Helpful (10) (1)

  • 5/5 Yes, I recommend this product

    October 15, 2010

    GO PURPLE!!!

    This gear oil is absolutely awesome! When I did a full rear axle/gear swap 3 months ago & upgraded from stock to Motive 3.90s, I used this gear oil for the install. Well, 3 months later & no wine, no grinding noises, & silky smooth shifts. Going Purp is the only way to go!

    Diego Walker

    Year: 1990 Driving Style: Daily Driver

    Helpful (6) (0)

  • 5/5 Yes, I recommend this product

    January 25, 2012

    Great reputable product for my 2008 GT

    I installed new FRRP 4:10s myself (I do all my own work) and used Royal Purple 75w90 for the 500 mile break in period. After the break in period, I removed the cover, inspected the ring gear and put it back together. I then filled the diff with Royal Purple Max Gear 75w140 weight oil. I plan on reinspecting at 10K miles. The car accelerates much better than with the factory 3:55s. Has a little bit more whine than the stock gears, but my rear supension is not stock either and transfers more noise. To protect my new rear set up I chose Royal Purple because of the temperature and low friction properties (slippery) + I did not have to worry about a friction modifier adder. I buy the majority of my high perfomance components from American Muscle. Good prices, quick delivery and great customer service. A supercharger is next...!

    2fast08

    Year: 2008 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 1 Ohio

    Helpful (3) (0)

  • 5/5 Yes, I recommend this product

    January 07, 2012

    Satisfied coupled with Ford Racing 3.73 Rear Gears

    No Gear wine or chatter with new set of Ford Racing 3.73 Rear Gears. Shifts are nice a smooth.

    NLDawg72

    Year: 2006 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 1 Allentown, PA

    Helpful (3) (0)

  • 5/5 Yes, I recommend this product

    October 15, 2010

    75w140 Gear Oil

    The Royal Purple 75W140 Gear Oil is the absolute best quality gear oil that you can buy--bar none. I have used RP's manual transmission oil as well for the past three years and it is smooth, smooth, smooth shifting. You cannot go wrong when buying Royal Purple. It is the best on the market...fullstop!

    Steve N

    Driving Style: Daily Driver

    Helpful (4) (1)

  • 5/5 Yes, I recommend this product

    March 05, 2012

    Royal Purple is the way to go

    i had my T-Lok and 4.10 gears installe at my local dealership and the mechanic told me to get the Royal Purple instead of going with motorcraft and ford's friction modifier. I used the 75w90 for my break in period and switched to the 75w140 for the rest of the life of the car. you cant go wrong with Royal Purple products!!!

    Top 250 Contributor

    MaxwellMurder

    Year: 2010 Model: V6 Driving Style: Street / Strip 'Stangs I have owned: 1 Butler, PA

    Helpful (1) (0)

  • 5/5 Yes, I recommend this product

    October 14, 2010

    the best gear oil

    i but this product like 2 or 3 months ago when i do my 3.55 geras isntallation and it seems to be working good no problems at all ... i will recomend to use when ur doing gears or just oil change..

    salvador

    Driving Style: Daily Driver

    Helpful (3) (2)

  • 5/5 Yes, I recommend this product

    September 28, 2009

    No complaints

    Bought to change my rear diff cover to the girdled style and for my axle bearing change. No complaints other than the bottle's lid could use a better design; flimsy and leaks a little around through the threads when you're trying to squeeze it out into the differential. Call me wierd, but I like the smell! Supposed to be the best there is and run cooler. Rear diff girdled cover will likely bump you up to 2.5 quarts on refill, so get three if you change your stocker!

    StNcLd

    Helpful (1) (1)

  • 5/5 Yes, I recommend this product

    October 15, 2010

    Perfect!

    Worked perfect! no problems! 5 stars

    Eric R

    Driving Style: Daily Driver

    Helpful (0) (2)

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