MAX GEAR 75W140- Quart, pack of 6

I love Royal Purple Differential Fluid as well as their Manual Transmission Fluid. Good stuff that I swear by!

Royal Purple is always high quality.

I'm so used to companies flat out falsely advertising their products and promoting product features that don't do as described.. I've gotten to the point I just don't believe anything and only expect what I've already come to know from experience. Regardless, the time came to change differential fluid.. and I want nothing cheap for my Ram. I decided that, based on reviews, the least this product would do is lube as well as other gear oils. To my surprise, there really was immediate results from using. I expected nothing noticeable, but it actually did improve performance. Most people I know never even bother changing their differential fluid. For a 100 mile round trip (that I make twice a week, every week for years).. my MPG increased from an average of 14.5 to 16 on average (fluctuates with oil life, air filter and aggressiveness) to 18.6, which is actually higher than manufacturer's estimated MPG 14/18 city/highway). I gained this while driving fairly aggressively (a bit above normal), as gas mileage was the last thing on my mind to test or check. I just happened to notice after the trip while checking diagnostic logs for other things. The gain was just significant enough that it was undoubtedly the fluid change affecting it. Too many things affect torque and horsepower for me to have solid statistics from comparison, but as a "first time" Royal Purple user, the results that have been noticeable has made me more optimistic towards effects less noticeable or not noticeable at all.. such as advanced conditioning and wear reduction.. effects that would take much more time to observe. Because of my experience, I will now be ditching Mopar and replacing various fluids throughout my vehicle with Royal Purple. I don't recommend for others to make decisions based on my review, though. I suggest trying the product out next oil change and make decisions based on first hand experience.

I have used this product in the rear differential of my 2003 F150 4x4 with great results. This is the second time I have changed the gear oil with this product and I like it better than other synthetic gear oils, primarily because I experienced no chatter with it (I did add the Ford friction modifier). I also use this same brand for the gear oil in the front differential as well.

Great price and fast shipping

Suggested for the ford 8.8 rear differential in the 01 explorer sport trac even tho amazon says no. Really smooth and kinda messy. Make sure you have a small flex funnel to add the oil. No leaks yet but that has to do with seals not fluid. Seems hugh quality uoud expect from royal purples.

Used in my 2013 Ford escape 2.0 differential no issues. Original oil has about 160k on it and was black thick and stunk bad. This seems.to work great no issues at all. When I bought it a year ago it.was $10ish cheaper

This is a great gear oil to use. This seems to work best for my sports car. It is a bit more than most but worth it.