There isn't much contest that the "high-end" synthetic Manual transmission gear oils are very much superior. The toss up is if you use Amsoil, Redline, Royal Purple, or Mobil1. Those are in the order of "quality" as fas as I know, with Redline maybe outdoing Amsoil Mobil 1 is the slightly lower quality/cheaper of the group. But whatever works for you, any of them will be much better than a normal natural based oil.
LSD maintenance
- Thread starter MikeyG_U2
- Start date
The manual indicates 2.8 quarts, but when you actually fill it, it'll take in excess of 3 quarts... nearly 4 or even more to meet the fill hole like is indicated in the manual, which makes basically no sense. But that's what I saw physically when I dealt with it!03MSP said:Actually T3ase...tranny holds 2.9 liters. Yes, I do read my manual
Later.
Steve
Just a quick heads up on the tranny fluid: since the LSD shares the box with the gears, you need to think about the synchromesh cones that match gear speeds to avoid grinding the gears. A GL-5 rated fluid is too slippery and the synchros won't work properly thereby slowing your shifts. This is why Redline MTL and MT-90 are GL-4 rated. They are less slippery to allow the synchros to work properly while still giving excellent lubrication to the gear faces. Go check out the Redline web site.
Also: my tranny took 3.5 quarts of Redline MT-90. I know because I had to buy a fourth quart to fill it. YMMV.
Also: my tranny took 3.5 quarts of Redline MT-90. I know because I had to buy a fourth quart to fill it. YMMV.
GL-5 is not "more slippery" than GL-4. The difference is that a GL-5 rated gear lubricant contains a higher level of EP additives. These are "extreme pressure" additives that provide more protection for certain types of gears. These additives are most important for gear sets that are subjected to the high pressures and high shearing forces normally found in high performance vehicles. In fact the only place that wouldn't benefit from a GL-5 rated lubricant is an application that specifically calls for a GL-1. I know of no automotive application that calls for this, certainly not a current model Mazda.
flyguy
flyguy
MSP Pro said:
Hi t3ase:
Certain applications may specify a GL-1 or GL-2 gear lubricant, in this case you cannot use anything else. The reason for this is that the EP and AW additives are not compatible with the metal because the gears contain brass or bronze material. Any application that specifies a GL-4 can safely use a GL-5. In fact a GL-5 will give more protection under conditions of high shock loading such as you will find in the components of high performance vehicles. Here is something else you should probably consider. Mazda specifies fluids based on the conditions expected for the component, any modification to increase power or performance may be outside those for which the component was designed. In other words, using a superior lubricant may be well advised.
Flyguy
Certain applications may specify a GL-1 or GL-2 gear lubricant, in this case you cannot use anything else. The reason for this is that the EP and AW additives are not compatible with the metal because the gears contain brass or bronze material. Any application that specifies a GL-4 can safely use a GL-5. In fact a GL-5 will give more protection under conditions of high shock loading such as you will find in the components of high performance vehicles. Here is something else you should probably consider. Mazda specifies fluids based on the conditions expected for the component, any modification to increase power or performance may be outside those for which the component was designed. In other words, using a superior lubricant may be well advised.
Flyguy
t3ase said:
Similar Threads and Articles
