Transmission fluid in both manual and automatic transmissions also helps to keep the transmission cool. Shifting gears is a strenuous task for a car, and transmission fluid is what allows a vehicle to shift with ease without wearing down its parts.
Next you will find documentation from the Bentley manual on how to change your oil in a E46. Last you will find the official directions from ZF on how fill and check the ATF Fluid. So, in conclusion, your ATF should be changed. If done correctly this will not cause any problems to your automatic transmission. Most problems if any that occur
Multi-Vehicle Synthetic Transmission Fluid. Multi-vehicle transmission fluids are becoming more and more popular in the marketplace. Oil marketers design these fluids for a wide range of automatic transmission types. While they are not licensed by any specific auto manufacturer, they are designed to provide superior performance and protection.
The trend in the automotive industry (and this is not just BMW, but every manufacturer) has been to increase service intervals to artificially reduce the cost of ownership. The issue with this is those intervals have been proven to be detrimental to the long term reliability and service life of the vehicles in question. This is the case with BMW's 6HP and 8HP automatic transmissions.
Changing the filter changes most of the fluid, and you clean the magnet. That is plenty enough. If you REALLY REALLY REALLY must flush the fluid, you can do it yourself by removing the lower trans cooler hose and putting an old garden hose over it then putting that in a bucket. Then disconnect the fuel pump via the fuel pump relay or the
The method of changing the oil has not really changed much either. There are 2 options that owners have preferences for: 1) Drain the trans and refill regularly maybe every other engine oil change on an on-going process. or. 2) Drain, fill and then flush until oil comes out clean and filling in-between.
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how to change automatic transmission oil