Advances in Automatic Transmission Cleanliness

This paper presents the rationale and underlying logic for automatic transmission filtration contaminant control (ATFCC). This approach relies upon an integrated filtration system as opposed to simply sandwiching in a piece of filter media or metal screen in the traditional transmission oil sump area. Most significantly, quantitative filtration system design and specification will result from implementation of a thorough ATFCC approach.

A new transmission filter test procedure is also presented which closely represents the field operation of these types of filters. Test results are presented which compare the new test procedures results' with more traditional Multipass Filter test results.