1965-02-01

Tailoring Automatic Transmission Fluid Shift Quality in the Laboratory 650466

The influence of lubricant formulation and service degradation on automatic transmission shift quality was studied in full scale transmission cycling tests. Fluid frictional degradation was found to follow a well defined pattern. This pattern is influenced by fluid formulation as well as transmission environment. Both fluid oxidation and selective additive degradation affect the rate of progression through this pattern.

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