Viscosity of Drive-Line Lubricants by a Special Mini-Rotary Viscometer Technique

Paper #:
  • 1999-01-3672

Published:
  • 1999-10-25
Citation:
Lloyd, W., Perez, J., Pruden, D., Henderson, K. et al., "Viscosity of Drive-Line Lubricants by a Special Mini-Rotary Viscometer Technique," SAE Technical Paper 1999-01-3672, 1999, https://doi.org/10.4271/1999-01-3672.
Pages:
10
Abstract:
Current specifications for automatic-transmission fluids and gear oils have viscosity limits which are determined by ASTM D 2983. However, that test is plagued by poor precision. This paper describes the development of a method using the Mini-Rotary Viscometer to make the determination of apparent viscosity at the same nominal shear stress as ASTM D 2983.In this test procedure, samples are cooled in a manner similar to that described in ASTM D 2983. Experimental data were obtained on a mixture of 17 automatic-transmission and gear-oil fluids that included a number of different formulation strategies and commercial products. The results of this method yield a nearly one to one correlation with the results determined by ASTM D 2983.
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