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Old 09-16-2011, 08:50 PM   #8
the misanthropist
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Join Date: May 2002
Location: a house
Posts: 6,251
The lurch almost sounds like it's just a downshift... the transmission pops down a gear, revving up the engine, which reduces the vacuum and the brake assist.

edit: hmm saw yours isn't auto. Not sure what causes the lurch, but the lurch would result in the engine revving so that would explain the brake assist loss
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