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Kinda sounds like a tire has a belt separating.

 

I would suspect something in the driveline or a bad/out of balance tire, if it was a misfire it wouldn't just be at a certain speed most likely.

 

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Maybe a trip to a tire store is in order. Similar thing happened to a vehicle my daughter bought some time back, but her's would shake bad at about 50. New tires installed, no more shake.

 

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Fuel pump?

 

Man, I'm sorry he's at Altus... Let alone his Taco giving him troubles. My wife was stationed there for a little bit and when I went to visit a few times I was amazed at how much of nothing was out there

 

Yeah it's not a place I'd want to live. I saw a couple of youtube videos of the town and it wasn't pretty.

 

At least the gas was cheap there! Although that was two years ago... Tell him to check out Donuts and Fried Rice... It's like 5 minutes outside of base and I think my wife ate there just about once a day. I will say the older/historical part of Lawton is pretty cool, made me feel like I was in one of those "never have to lock the front door and everyone's my friend" sorta place