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6.4L Power Stroke Engine and Drivetrain Discussion of the 6.4L Power Stroke diesel engine and drivetrain in the 2008 Super-Duty trucks. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.4L Power Stroke engine.

       
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Old 05-30-2008, 07:36 PM   #1 (permalink)
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brake/air conditioner rumble question

2007 F250 SD 4x4
39,000 miles

Lately I started feeling a slight vibration in my pedal foot or hearing a slight roar when beginning a turn. At a stoplight today I noticed it just seemed different and loud. I turned my fan down and the roar went away. At the next light I turned it off again and I heard the rumble and felt slight vibration in my brake foot. Very strange. Although I cannot duplicate the brake vib at every stop it seems related to the a/c fan. The roar and vib is sort of like the one you get if the power steering was having issues but much quieter.

Somebody mentioned that it could be a brake booster issue.

If someone could sort through my poor description of my problem and shed some light I'd appreciate it.
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Old 05-30-2008, 10:40 PM   #2 (permalink)
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brake booster issue.
Check your fluid.
Change to Mobil 1 synthetic ATF if you can.

If under warranty, take it in. Let them work their magic, THEN change to Mobil 1 synthetic ATF.
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  Diesel Forum - The Diesel Stop.com > 2008-Up Super Duties > 6.4L Power Stroke Engine and Drivetrain



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