Vibration getting worse

[Daurie]

Can you get a C clamp in there and clamp the trans mount to the cross member? I cant remember off the top of my head if there is room but if you could get a clamp between there nice and tight. If one side is lifting under slight throttle making a small gap it could be the culprit. If you try it and it will fit, I'd tether said clamp off somehow just in case.

[jp-]

A few more things to check:

-Engine fan, make sure you're not missing a blade.
-Wheel bearings, make sure they are tight.
-Rear diff pinion nut, make sure it's tight.

[SafeAirOne]

Suggestion...

You can't fix it if you cant isolate the source (of course). You might try to narrow down the source of the noise/vibration by having a competent person either 1) drive the rover while you sit in the back and determine if the problem is coming from the rear axle or 2) do it the other way around with a competent listener.

Also, and this may sound rediculous but it works, you might try getting a small length of garden hose, fixing one end so that it points at a suspected noise source and stick the other end in your ear while someone drives around. Keep doing this until you find the source. Of course this may be more difficult in our normally noisy rovers. Needless to say, make sure the length of hose isn't going to get snagged on any moving bits.

Might have someone drive it around while you look and listen through the (removed) access cover under the center seat also.

[thixon]

Also, and this may sound rediculous but it works, you might try getting a small length of garden hose, fixing one end so that it points at a suspected noise source and stick the other end in your ear while someone drives around. (removed) access cover under the center seat also.

Not ridiculous at all. I've done this for years to diagnose anything from bad bearing in engine parts to valve issues. Works great.

[bearcrawl]

Interesting new advice. I was ordering a few new gaskets and came across a new opinion. A fellow @ a parts supplier, not our hosts, is trying to convince me this noise is normal. Would any of you consider his noise normal. Again @ highway speed I am getting a pretty loud pretty violent vibe or rattle. Sounds like its coming from the t-case behind the parking brake. It happens when I feather the gas coasting. Applying no real load either pos or neg. Not the O/D. Neither diff. Replaced Transmission / engine mounts. Tight main shaft nut. Nut under prop shaft is good (both ends). Parking brake is in good working order, although, are there any parts in the P-Brake that could be responsible for this. Going to pull speedo and inspect now. Thanks again guys for all the help.

[Daurie]

What you're describing doesn't sound normal to me.

At the moment I'm putting my money on a transmission mount.

[bearcrawl]

replaced both, keep em comin.

[Momo]

Take your floor panels out and drive around. You might end up seeing the problem as well as getting a clearer earshot of it.

[Tim Smith]

Try grabbing the e-brake drum and wiggling it. I'm wondering if your output shaft is loose like mine was a few weeks ago or if the brake drum has somehow just made it's way loose.

Another thought. This one is a bit dangerous so use your head... Have you tried jacking up the rear on stands and spinning up the rear tires? I'm wondering if a wheel balance has fallen off and is just making the exhaust rattle along the frame somewhere. Just a thought but you really shouldn't notice anything with tire balancing until about 30 mph.

[Les Parker]

Is there any loss of trans fluid from the handbrake backing plate?
My thought is either the output shaft bearing in the t. box or the rear drive shaft is out of balance (taken that the u/j's have been checked and are in good order)

2p

[xsbowes]

What type of vibration does it sound like? Mechanical or maybe more like sheet metal. I was getting a loud vibration at idle and could not figure out where it was coming from. I thought it was the transfer case because of its territorial marking capability. After awhile of searching for the source I discovered it was coming from under the driver's seat (LHD), I pulled my seat and access cover, the vibration was from the fuel tank (military type which is normally empty). For some reason the extension tube and the top of the tank vibrate obnoxiously loud. I don't think the aux tank is original because the cap is not the same as the passenger side and it is not POR coated like the rest of the undercarriage. It's not as annoying as the mystery toe heater (feels like direct exhaust on my foot but only when I'm moving).

[adkrover]

Ok, I've followed this thread for some time now and I'm starting to thing its about time you accept the fact that your truck (and all series trucks) make NOISE! It's either that or you rebuild the entire vehicle so you can eliminate almost all possibilities. Almost all because even rebuilt parts can be defective or installed incorrectly and no matter what, it will never sound like a new suv.