vac or hydro boost?

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Jun 6, 2009 | 01:13 PM

05superv10

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vac or hydro boost?

I think i need a new master cylinder. how do i tell if i have hydro boost or vac boost it is a 05 f250 with tow package 4x4 v10

Jun 7, 2009 | 07:31 AM

Lazy K

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If it is vacuum there will be a large "drum" against the firewall with a single vacuum hose connected to it and the master cylinder bolted to the front of it. If hydraulic the booster is much smaller with two hydraulic hoses going to it and the master cylinder bolted to the front of it (the hydraulic booster really looks like another master cylinder without the resevoir).

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