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I plan to change my transmission and.... (archive)

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Posted by Steve Borsse on September 26, 1998 at 12:31:19:

In Reply to: Changing transmission fuild in M Roadster? posted by Jason L. on September 26, 1998 at 09:55:43:

differential fluids to Redline synthetics when they are due to be changed during the regular BMW maintenance program in my 98/2.8. (I'll supply the dealer with the Redline product and they'll do the labor.) Redline makes fine products for this. They have a "ShockProof" gear oil that provides much greater viscosity in the thin layers between the gear teeth, but at the same time having very low internal fluid friction, which means very little power loss for the protection achieved. There is a 40% lower coefficient of friction and 250% the load-carrying capacity compared to conventional gear oils, which means the metal-to-metal friction is greatly reduced! Temperature reductions between 25-75 degrees are common in circle track, road racing, and off-road racing. Redline offers three weights in this "ShockProof" gear oil, and I will talk to one of their engineers soon as to which one is recommended for the Z3/climate/driving habits/etc. The retail price is $8.50 per quart. (They were extremely helpful in picking the correct weight synthetic motor oil for my 2.8.) You can receive a very informative brochure on their gear oils (with test charts) by calling 1.800.624.7958.

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