What is auxiliary?

auxiliary seal

Glossary “auxiliary seal” Definition:
A secondary seal mounted outside the seal housing. 1). To prevent refrigeration oil from escaping and entering the clutch assembly. 2). To aid in the prevention of the loss of fluid from a system.

auxiliary section

Glossary “auxiliary section” Definition:
The section of a transmission housing the auxiliary drive gear, main shaft assembly, countershaft,, and synchronizer assembly, where range shifting occurs.