can anyone help ? getting a vibration at 95mph goes off at 100mph and is smooth below 95mph. Can feel it through the seat and in the cab in general, feels like a change to a rough road surface or uneven concrete road surface, have had prop shaft and wheels balanced no better, it's not bad but anoying - any ideas? Tork convertor balance? although do not get it through any other gears, only at the one speed.

 

A friend of mine had the same problem with a 2001 spot-trac, turned out that he had a torn belt in his tire which you couldn't see. The dealer couldn't find this problem, it took a really good tire shop that does that old school balancing on the rim.

Adam
1999 F250SD 4x4 PSD "hot" chipped
2001 Black L on order

 

Ummmmm... yes I'm familiar. Don't expect much of an answer from Ford on this one. "It's a truck you know. They vibrate a lot!?!"

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2000 Red Lightning - #835 of 4966 Born 3-8-00 / Delivered 3-22-00
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Best time: 13.45 sec. @ 101.99 mph

2000 Red Trans Am Ram Air WS6, 6 Speed - Delivered 2-15-00 - Awesome Looking Car

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Does changing the tire pressures affect the mph that the vibration occurs? I've noticed that a slight vibration I had at 75 mph @ 28 psi has now moved to 80 mph @ 31 psi. It also diminished it to some degree. I only changed the pressure in the rear tires in order to loosen up the handling a bit, the fronts are still the same.

LocoSVT
00 Red Lighting
EuroLid II, BedRug, misc stero mods