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So I got a puzzler. Don't even know how serious it could be. I have some theories but I'd like to just provide the symptoms and see what some of you guys think about them. I recently drove without the radio on and heard and felt something I hadn't noticed before. So I have a 2005 with the 5.7, and the five speed automatic, and 3.90:1 rear end. In fifth gear I'm up over 2k rpms going 55-60mph and I noticed at that speed, if I backed off the gas and then gave it very light throttle input, like as little as possible but still pressing the pedal, I got a funny noise almost like the engine bogging and I felt a vibration in the steering wheel, not the floors, pedals, seat etc, just the steering wheel. The more I play around, I can duplicate it in any gear at almost any speed, but just letting the car coast for a minute and then feather the gas ever so slightly. If I give it more gas it goes away. If I hammer it, I don't notice it happening. If I go through all the gears just giving it some gas, then I also won't notice it. Today I got it to do the noise and vibration going uphill, by backing off the gas until I was giving just barely any throttle. I also took note when I was going down a very steep hill, I was coming to a stop sign and was on the break, I could feel it shift down through the gears and aid in slowing the car, and I felt no vibration and heard no noise. I also don't hear or feel anything if I let it coast down a hill and build speed on its own and bump through the gears under its own momentum.
Also the auto stick thing was broken when I got the car so I can't shift it manually to observe anything that way.
Curious what you guys think about what's going on. Oh yeah, if I'm cruising in high gear and get it to do the thing, it will keep on doing it for ever unless I let off the gas completely, or give it more gas. I think I noticed it cruising in that state under cruise control at 60mph today.
Also the auto stick thing was broken when I got the car so I can't shift it manually to observe anything that way.
Curious what you guys think about what's going on. Oh yeah, if I'm cruising in high gear and get it to do the thing, it will keep on doing it for ever unless I let off the gas completely, or give it more gas. I think I noticed it cruising in that state under cruise control at 60mph today.