Slight vibration after lift

[Peppercorn]

I have just done a 2" lift on my '98 Disco and I've noticed a slight vibration that seems to be coming from one of the tail shafts.

It isn't bad, but it is noticeable. Is this a common occurrence after lifting the suspension?? and if so, is it more likely coming from the front or back shaft and what is the fix???

I noticed that the rear shaft doesn't have a rear uni joint but instead a rubber mount. Is this usually a problem?

Thanks for any help in advance.

Peppercorn.

[waynep]

could be the donut ( the rubber joint you refer to ). If you look closely you might see some cracks or elongation of the bolt holes.

[knotty7]

could be the donut ( the rubber joint you refer to ). If you look closely you might see some cracks or elongation of the bolt holes.

What Waynep said. Most likley the donut

[Peppercorn]

thanks guys!!

DO you just replace it or is there a conversion to Uni joints that owners choose to do???

[waynep]

Replacing it is easiest ...then carry a spare with you. ( or carry the old one as a spare if it doesn't fix it )

Some do convert to uni it but that is much more involved of course - search for more info on the site.

[Peppercorn]

Thanks Wayne.

[Bush65]

Suspension lift increases flexural stress in rubber coupling, so their life is generally reduced.

[Blknight.aus]

its not just limited to rubber couplings, sometimes a UJ will Settle into its natural running position and when you lift it you change that so you get the vibe.

It may only be one on a shaft but if your UJ's are say 50K Km old it might be worth changing them if your dropping the shaft to do the donut anyway.

[Peppercorn]

Yea that makes sense. I was just trying to find out whether it was common for the front shaft or rear shaft to vibrate after a lift but it is never that simple is it?

[Blknight.aus]

the rubber donuts (and therefore the rear propshaft) are a lot more prone to it and it will repeat as the rubber is stressed more, as already covered.

Re do the rear shaft first

[Shamo]

I just went through this massive saga with all this stuff. I had to get a new tail shaft and diff yoke cause i left it too long, you should change the couplink as soon as possible, it cost me a hundred bucks for the couplink by itself and all of it only took me half an hour to change, but that was with all the extra stuff as well (being a new tail shaft and yoke) man it was worn out, just do it asap to save money hey