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Retail Lubricants
Published in R. David Whitby, Lubricant Marketing, Selling, and Key Account Management, 2023
After a significant amount of development work, General Motors introduced its new Dexron-VI specification, which is a significant upgrade from the previous Dexron-III(H) ATF. The new fluid has been designed specifically for six-speed Hydra-Matic 6L80 automatic transmissions, in which new direct clutch interfaces require greater precision to keep interactions consistent.
Automotive Transmissions and Drive Trains
Published in Don M. Pirro, Martin Webster, Ekkehard Daschner, Lubrication Fundamentals, 2017
Don M. Pirro, Martin Webster, Ekkehard Daschner
General Motors released DEXRON VI as a fill-for-life fluid for 2006 model year cars. This DEXRON VI fluid had even greater antiwear performance compared to past DEXRON type fluids and has improved oxidative, thermal, and shear stability to provide extra protection under severe service conditions. The DEXRON VI is back serviceable to all DEXRON III and DEXRON IIe applications. Many current GM vehicles use DEXRON VI as its power steering fluid. Please refer to the vehicles owner’s manual to select the proper power steering fluid.
Numerical simulation of ball bearing flow field using the moving particle semi-implicit method
Published in Engineering Applications of Computational Fluid Mechanics, 2022
Wei Wu, Chunhui Wei, Shihua Yuan
The type of angular contact ball bearing used in this experiment is SKF 7210 BECBP. The structural dimension parameters of the SKF 7210 BECBP are given in Table 1. The lubricating oil is an automatic transmission fluid, which is ATF DEXRON III. The parameters of lubricating oil are shown in Table 2. The spindle rotation causes the bearing inner ring to rotate, and the interaction force between the inner ring and the roller causes the roller and cage to move. The motion of the rolling elements will cause a complex flow of the lubricant oil. In the process of calculation, the rotational speed of bearing balls and cage needs to be determined. The formula for calculating the rotational speed of balls and cage was proposed by Harris and Kotzalas (2006). where ni is the rotation speed of the inner ring, rb is the rolling element radius, rm is the pitch radius, α is the contact angle.