Comments on: TRANSMISSION AND DRIVELINE OFFSET http://www.ret-monitor.com/articles/822/transmission-and-driveline-offset/ Specific mission-critical info for professionals Fri, 10 Feb 2012 13:21:43 +0000 http://wordpress.org/?v=2.7.1 hourly 1 By: Terry http://www.ret-monitor.com/articles/822/transmission-and-driveline-offset/comment-page-1/#comment-6175 Terry Tue, 25 Jan 2011 06:04:55 +0000 http://www.ret-monitor.com/articles/822/transmission-and-driveline-offset/#comment-6175 The transverse box tends to be lighter even with the 90deg input. One reason for this is that putting the hypoid bevel gearset at the output, like in a longitudinal layout, means that it is also carrying the highest torque loads. Torque loads tend to be the primary factor with regards to gear weight. Bevel gears naturally have more gear steel, and also require heavier bearings due to their combined radial/axial loads. A bevel gear set at the output must also be sized for the max torque loads incurred at the lowest gear (ie. 1st gear). A bevel gear located at the input is sized for torque loads independent of the shift gear ratio, and carries less torque due to its higher speed. The longitudinal gearbox hypoid's combination of a heavy type of gear with heavy bearings, located at the point of highest torque loads, makes for a relatively heavy transmission in comparison to the transverse layout. The transverse box tends to be lighter even with the 90deg input. One reason for this is that putting the hypoid bevel gearset at the output, like in a longitudinal layout, means that it is also carrying the highest torque loads. Torque loads tend to be the primary factor with regards to gear weight. Bevel gears naturally have more gear steel, and also require heavier bearings due to their combined radial/axial loads.

A bevel gear set at the output must also be sized for the max torque loads incurred at the lowest gear (ie. 1st gear). A bevel gear located at the input is sized for torque loads independent of the shift gear ratio, and carries less torque due to its higher speed.

The longitudinal gearbox hypoid’s combination of a heavy type of gear with heavy bearings, located at the point of highest torque loads, makes for a relatively heavy transmission in comparison to the transverse layout.

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