When I step on the gas my disco starts to vibrate. I can feel it on the pedal, floor, and even in my seat. Feels like its going to fall apart. I was thinking unbalanced wheels, but this just doesn't feel right. Maybe driveshaft, U-joint, or possibly an axle. Has anyone dealt with these problems. I can't afford to pay a shop $130/hr just to look at it. When the forum is way more helpful. Any suggestions would help. Thanks guys.

 

$130 an hour? Where do you live that you can't find a shop with a better rate? I'd gladly look at if for $120! Helpful clarification, does it do this when cruising at a constant speed? That may help someone answer your question.

 

I live in Las Vegas. I mean I could go to a tireshop and have someone who doesn't know what they are talking about for $110. No only really vibrates when I am accelerating. When I let off the gas it goes away but still feels like something is grinding.

 

Could be almost anything, bad engine mounts, a severe mis fire, transmission problem, transfer case problem...almost anything.
It is not tire related though, if it was it would do it all the time.

Open the hood and with the engine running rev the engine while you are watching and see if it vibrates bad.

 

Leave it on the main drag thru Vegas with the keys in after making sure insurance is current. Somebody will take care of it for you and you get another one.

 

My had vibration when accelaratind and bad rear drive-shaft was the problem (one of the four connection points on drive-shaft u-joint was broken)
Vibration was only severe at 75mph, other vise just slight when accelarating.


one of those pivot points was cracked and the rest were loose (at the rear end) resulting in D-S being of-center and causing vibration....
To check for this - go under the car and try to spin each drive shaft with your hand back and forth, and see if there is any play in the joint

 

That's funny Danny a driveshaft sounds right when I hit 30mph is when it gets bad and makes a noise with the vibration/rumble. There is disco shop out here for older range rovers I think I will take it to them

 

I second the drive shaft area, I had a similar problem and found I needed to replace one of my u joints, I should have done all 3 but the first one turned out to be more of a job than I was prepared for. anyways I figured it out because I wanted to turn the drive shafts just a bit to see so I laid under the truck and pushed the truck forward with my feet (I had it in park but it will roll about an inch or two) anyways when moving it back and forth a bit I could see one of the u joints was clunking a bit so I replaced it and found a small crack under the bearings wasn't much but it made a huge difference. may also check your rotoflex mine was pretty torn up (I replaced that at the same time and thought that was the cause of my problem up to that point)

 

Make sure that you make an indexing mark on a set of bolts on each end of the drive shaft before you disconnect it so you can remount it in the same orientation as it currently is in. Otherwise you will induce a nasty vibration, the drive shaft is balanced and you want to maintain that original orientation onb reassy.

 

So a quick question Danny what if I buy a new/used shaft. How will I know what is the correct way to line it up? That's only if I need to replace it. I hope not, but I'll do what I need to do.