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. On 2013 and newer trucks, the solenoid was moved next to the brake booster on the driver’s side. Connect a vacuum pump to the hose going to the IWE units. The readings should not drop more than 12.5 mm-Hg (0.5 in-Hg) per minute.
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