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| 2004 to 2008 F-150 and Mark-LT 4.2L, 4.6L and 5.4L equipped F-150s and Mark-LTs. |
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#1
Mon, February 23rd, 2009, 01:10 AM
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Belt Slippage
Did not know of one common place to post this thread.
Hate to disappoint you guys but this is not just a Ford thing!!! Belt slippage is a side affect of almost every serpentine belt system ever manufactored. Most of the direct cause is the tensioner and it's inability to keep up with system load. More at WOT but also times at shift points when AC is on and a good load is on the alternator when driving vehicle sensibly. Bill has noted this in another thread. There are companies that sell better designed belts than that of the OE style. They definately help the system. Also stiffer tensioners are offered for more HO systems. Under drive pulleys also can dampen the sound. The worst one I ever heard doing this was a Buick gnx 3.8 with twin turbos after it launched off the line. That owner replaced the belt every race. Lars
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