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Ford F250: I have a F250 diesel 4x4. It thumps when you first…

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I have a F250 diesel...
I have a F250 diesel 4x4. It thumps when you first start it up n while you are driving n it makes the truck go faster. Tires are fine.
Submitted: 3 years ago.Category: Ford
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Answered in 1 day by:
6/21/2015
Ford Mechanic: Ray M., Ford Master Tech replied 3 years ago
Ray M.
Ray M., Ford Master Tech
Category: Ford
Satisfied Customers: 3,085
Experience: 30+ years in trade, Ford Master Tech, Journeyman Automotive Tech
Verified
What year is your truck, and is it a standard transmission?
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Customer reply replied 3 years ago
1993 manual transmission
Ford Mechanic: Ray M., Ford Master Tech replied 3 years ago
Does the thump or noise change when you push in the clutch and put it in gear or speed up the engine?
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