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Old 02-26-2011, 11:33 AM
1964afx 1964afx is offline
Dodge Ram Forum Newcomer
Join Date: Feb 2011
Location: norht carolina
Age: 57
Posts: 1
Gender: Male
Vehicle: 2009 dodge 2500
Trim Level: slt
Color: intense blue
Engine: 1994-2001 488ci (8.0L) LA V10 300 hp 450lb/ft
Rep Power: 0
1964afx is on a distinguished road

I also have this exact same issue It just started about 1,000 miles ago, my truck is a 1999 2500 V-10 that I bought new and only logged 81,000 miles on it so far. I use it mostly for towing race car with a 32 foot enclosed trailer. I hear the same rattle or tapping sound @ 2000 rpm only at highway speed and light throttle input, if I lift off throttle slightly, it goes away and if I tip slightly on throttle when at 2000 rpm it also goes away. This noise is there at any cruising rpm on the highway when the vehicle settles in at a certain speed and light throttle input, I just noticed it @ 2000 rpm because that is where I am mostly cruising along when I noticed it. It does NOT do it at start up, idle, or if I rev the engine. Note: the clutch, flywheel, pilot bearing and release bearing were just replaced 1500 miles ago. All parts replaced with factory parts. I have used Mobil 1 10w30 engine oil since day one and changed oil every 3500 miles religiously.
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