Royal Purple 01300 Max Gear 75W-90 High Performance Synthetic Automotive Gear Oil , 1 Quart (32 Ounces)
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The royal purple 75w is what I use. My RAM 2500 differential has a 90 in it. My differential is made by American Axle Manufacturing, and I spoke with one of their mechanical engineers, who told me that the viscosity requirement is determined by a number of factors, including ambient and operating temperature. Because I live in a hot climate, he suggested that I use a heavier weight oil. With this knowledge, I don't believe the difference between the 75 and 80 is significant enough to justify the better lubricity at lower ambient and operating temperatures. He did suggest amsoil, but added that the royal purple is just as good.
In transmissions, RP max gear should not be used. The syncros can't work properly because it's too slippery. Redline MT-II is a product that I highly recommend. Transmissions are worth $90.
As a motorcycle final gear oil, it'll work just fine. This product is used as a final drive oil as well as transmission oil in two BMW motorcycles, a BMW R1150RT and a BMW R1200S.
BMW fluid should be used.
Selected User Reviews For Royal Purple 01300 Max Gear 75W-90 High Performance Synthetic Automotive Gear Oil , 1 Quart (32 Ounces)
I was using Toyota's overpriced gear oil for the limited slip differential in my 2002 Toyota Tundra because I was a master technician for Toyota for over 25 years. When I was cold, I always had a problem with my teeth chattering. I switched to Royal purple a few months ago, and the differential is no longer chattering. Also, I've read in reviews that switching to Royal Purple caused oil seals to leak. I haven't had any leaks, so I'd say the other reviews about oil leaks were simply coincidental. This stuff is much less expensive than Toyota gear oil, and it appears to work better in a limited slip differential.
For those who are curious, it DOES contain the friction modifier additive required for Limited-Edition vehicles. LSD (Slip Differentials) are a type of tire that has a different shape than the.
For a solution to rear end shudder when taking off, I chose Royal Purple based on the Cummins Forum. My 2016 RAM 3500 had developed a noticeable shudder when taking off, especially when turning left at the same time, and I was due for a diff fluid change at 30K miles, but this problem had been present since before the 10,000-mile mark, and BTW, the RAM Dealer had found no problem. br>I immediately noticed a difference in the vehicle after switching to Royal Purple Max Gear 75W90 today. It appeared to be smoother even just driving across the parking lot. I'm so happy with Royal Purple that I'm in the process of switching all of my fluids to it. br>If you have a truck and tow a trailer, you should get this product and try it out. Oh, and I changed my rear differential cover at the same time to increase the amount of fluid in the system, but that'll be a separate review for my Mag-Drive. Cover made of Hytec.
I've been using Royal Purple lubricants in all of my vehicles for over ten years (possibly closer to twenty) and have no plans to switch anytime soon. I change the oil/lube in all components (i. e. , transmission, differential, etc. ) as soon as I get a chance after purchasing my vehicles. Over to Royal Purple products for the engine, transmission, differential, transfer case, and so on. Of course, I don't do it right away; when the oil and/or lubricant need to be changed, that's when I switch. All of my cars have responded favorably to Royal Purple products, and I've noticed minor differences in vehicle behavior (i. e. runs more smoothly, cools down, and so on. ) Also, if you pay attention to your car, you'll be able to tell when it's time to change the engine oil (decreased performance, lower mpg, car runs slightly hotter, etc. ). I've noticed that when I use Royal Purple, I can run longer/further than when I use other oils or the oils/lubes that came with them. Many people have their own opinions, and some don't believe oil is important at all. If you keep up with preventative maintenance and don't "abuse" your vehicle too much, it may not be. However, if you're the type who forgets or doesn't care about your maintenance schedule, or who enjoys driving the s*** out of your car (without going overboard, of course), I'd suggest looking into the Royal Purple products.
I have a 2002 Trans Am with 44678 miles on it, and the rear was noisy, so I started by removing the factory cover, fluid, and noticing fluid was clean, but my concern was it looked thin, I mean light weight (I think it was the wrong weight and a cheap inferior product, I cleaned the area and checked all gears for wear/or excess wear, all good, and replaced with a Updated cover called Perfect Launch all aluminum cover with drain and fill ports, added royal purple max 75-75 90 and the addition of a red line, as well as the addition of a lsd additive. br>After 5 miles of driving, I noticed a significant improvement in the vehicle's noise level. After a week (in my daily driver), the noise was completely gone. br>In my experience, I highly recommend this product; now I can drain and refill without having to remove the cover, and it is well worth the money to replace the rear diff cover.
After 40k miles, I drained the transmission and refilled it with the Royal Purple product, and the difference is night and day. Cold shifting is still a little difficult, but there's no grinding, and once the trans warms up, it's buttery smooth.
My vehicle of choice is a Jeep JK. Every two years, I service both my front and rear differentials. For the most part, I stick to the regular stuff, but I decided to give this product a try because of all the hype. I discovered that it performs the same functions as all other differential fluids. My hearing does not appear to be any better as a result of this. It does not give the impression that there is no wear on the ears. My seals are in good working order and aren't leaking at all. This product, in my opinion, is a ruse to get more money out of me, and it performs similarly to other cheap diff fluids.
My Mazda Miata was built in 1991. The differential makes a noise that is usually inaudible over wind noise, but I can hear it when driving along the freeway next to a concrete wall. br>br>At least, that's what I used to think. br>br>When I first got the car three years ago, I took it to a Miata specialty shop, where they determined that the problem was with the bearings, not the gears. They suggested replacing the diff with a junkyard diff, which I was unable to do at the time, so I have been having the diff oil changed on a yearly basis. It had been 40,000 miles since then. br>br>For some reason, I'd heard good things about the Royal Purple brand, so I decided to replace it myself this year now that I have a garage. When I removed the diff drain plug, I noticed about an eighth of an inch of metal stuck to the magnet in the bolt, and I could see the metal shimmering in the draining fluid. I refilled it with Royal Purple, spun the wheels a few times, drained it, and refilled it. br>br>Now, when I drive next to the concrete wall, I can hear the difference, but only just. I'm blown away. While expensive, the Miata diff only takes a half liter to fill, so it's a small price to pay (especially when compared to getting regular fluid at a lube shop). Perhaps this differential has another 40,000 miles in it. br>br>This has persuaded me that using a high-quality lubricant DOES MAKE A DIFFERENCE.