This tool allows you to set the clearance of the clutch pack. This increases the life of the clutch pack and provides for proper functionality. The pack clearance should be between .055 and .072.
Clutch Pack Clearance Tool — B&J Transmissions
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J-26914 Clutch Pack Clearance Gauge Applications: Allison. (0.074 - 0.147) Tool is utilized to properly set the clutch pack to Allison Transmission
Clutch Pack Clearance Gauge J-26914
B&J Clutch Pack Clearance Set Up Tool W/Indicator
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