Steering wheel vibration at all speeds on '06 Grand Cherokee
My steering wheel is shaking/vibrating on my 2006 jeep grand cherokee 4.7 V8. Normally I would assume that this was the alignment and balancing of the tires, but it happens at most all speeds and I'm feeling it in the gas and brake pedals some as well. I had my wheels aligned and tires balanced a month ago and it fixed the issues I was having then, but a few weeks later this started. My mechanic had it a few days ago to see if he could diagnose another problem and he chalked it up to it just being a jeep. He said they generally ride rough, but I don't know about everyone else but my grand cherokee has always driven pretty smoothly. Yeah I can feel the road a bit more than most cars but not like this.
I'm also having some trouble with my RPMs being erratic and idling issues, but that could be an entirely different problem.
I'm not sure if this helps , but anytime I have my foot on the gas I hear this whirring/humming sound. I want to say it's coming from the drivers side. As soon as I let off it stops. I've been getting lots of vibration and shaking when breaking from higher speeds too. You can feel it in the pedals, steering wheel, and on the floorboard. I'm worried that there may be a transfer case issue now too. It's been extremely sluggish for two days. It'll be working to accelerate and then it'll lunge forward for a second and throw me back. It just seems like it's working way too hard for what power I'm getting. Of course it's worst at startup. I've been doing a lot of work to it lately and I'm starting to get frustrated with it. I hate to give up on it because I've given it so much tlc and put a good amount of money into replacement parts and improvements.
I can't address all of your questions/issues, but vibrating in pedals and steering wheel when braking from high speeds is a sure sign of warped rotors. Depending on how many miles you have on the rotors you may be able to find a place that will turn them. If not, rockauto.com has good prices on rotors. Do the pads while you're at it. Most likely the front is the problem...
this is an odd response but i had a friend with the exact same problem and he had gone out trailing the night before. he drove it like that for a few days and then finely realized that there was a hardened and hard to see chunk of mud and rocks on the inside of his front right tire. sorta funny but he chiseled it off and it solved his problems. and i dont know why you would feel warped brake rotors when your not braking. ive had 2 vehicles with really bad warped rotors on the front and never felt them until i braked and then the steering wheel shook and brake pedal pulsed.
I have not been mudding or trailing recently, but this all DID seem to happen overnight. I checked under the car this morning and there was some sort of puddle on the passengers side. Not sure what I could be leaking. My car did the same thing this morning where it almost seemed stuck in a low gear for about 10 minutes.