Locking Hubs and Axles
Brake & Front End
SEPTEMBER 28, 2023
According to Ford TSB 20-2028, apply 508 mm-Hg (20 in-Hg) of vacuum. This is typically due to a partial vacuum being applied to the IWE. Partial engagement can cause rapid wear to the splines on the axle and wheel bearing hub unit. But, since the clutch ring is made of softer metal, it will take the brunt of the abuse. mm-Hg (0.5 mm-Hg (0.5
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