Word forms: (regular plural) balk rings
( Automotive engineering : Vehicle components , Engine, transmission, and exhaust )
The balk ring in a gearbox wears out very quickly so engagement can become a problem on that gear.
The 3rd gear shifts had become a bit crunchy, indicating wear on the 3rd gear balk ring.
The balk ring helps gear changes to be smooth by synchronizing the speeds of two gears before engagement.
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