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0307HTP BaerBrake21 Z

On F-bodies with Australian 9-bolts, an axle retainer plate is used on the outside of the axle. Unlike other F-body rears which use a C-clip retainer in the differential, the Australian 9-bolt needs no extra help to satisfy NHRA regulations. It's good to know there's something holding that axle in if it breaks on the starting line!
Baer Track System - The Cold Baer Facts

On F-bodies with Australian 9-bolts, an axle retainer plate is used on the outside of the axle. Unlike other F-body rears which use a C-clip retainer in the differential, the Australian 9-bolt needs no extra help to satisfy NHRA regulations. It's good to know there's something holding that axle in if it breaks on the starting line!  View Related Article

 

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