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Custom Dodge Ram Performance Mods - Engine - 4.7 Liter V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 4.7-liter V8 engine - 310 horsepower, 330 lb-ft of torque.


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  #1  
Old 07-20-2010, 10:16 PM
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GPSHSLAX GPSHSLAX is offline
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Default Hum when hill climbing.

I've recently noticed a slight hum when running uphill on the highway. It seems to happen only is the grade is enough (or the uphill is long enough) that I start to lose speed. I'll drop about 1mph and then I can hear a quite hum sort of like I'm running on rumble strips on the edge of the highway but barely audable. The hum will suddenly dissapear when I crest the hill. The funny thing though is that there is no change in RPM or indication that the trany is downshifting.

What is up with that?

I think I can hear it now only because of the new intake. It doesn't make the engine sound much different at highway speed really, but I seem to be able to pick out this sound now whereas before it was too muffled.
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Mods: Thule Xsporter 422XT bed rack, Underrail Rhinolining, MOPAR class IV Hitch, DIY CAI, Aero Turbine 3030.
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  #2  
Old 07-23-2010, 11:14 AM
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GPSHSLAX GPSHSLAX is offline
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Join Date: Sep 2009
Location: Cushing, OK
Age: 32
Posts: 1,023
Gender: Male
Vehicle: 2009 Ram 1500
Trim Level: ST 2X4
Color: Bright Silver Metalic
Engine: 2008-20?? 287ci (4.7L) PowerTech V8 310hp 330lb/ft
Rep Power: 5
Rep:236
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Default

Bump for my post, but additional info as well. Driving yesterday, and being hyper attentive, I noticed that at the same time as I hear the hum I can also feel a slight vibration through the floorboards. The condition causing this hasent changed, I just noticed the similtaneous vibration. Again it's not bad, barely noticable, but it's there.
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Mods: Thule Xsporter 422XT bed rack, Underrail Rhinolining, MOPAR class IV Hitch, DIY CAI, Aero Turbine 3030.
Future Mods/Wishlist: Tuner, Daystar Comfort Ride 1.5" Leveling kit, Nerf Bars, Police style push bumper with light guards, KC or Thule trail lights, HID projector lights.
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