Noise after lift, 97TJ, bump stop shaft & spring?

Hi,

Hearing a noise at about 25~30mph, during a slow left curve. Sound seems to amplify when small bumps are hit also during a left curve at same speed.

Over the Christmas break I installed a 4" lift on a 97 TJ, 4.0, standard. After the lift was installed I took it to a suspension specialist that aligned it and installed 2 offset ball joints. The offset ball joints help to bring the alignment in better.

During the installation process I noticed a real close fit between the passenger side front spring and the bump stop shaft at the top of the spring. It almost looks like the bump stop shaft does not fit exactly in the center of the spring. In fact the bump stop shaft seems to angle towards the front of jeep, just missing the spring by about 0.25 inches. Since the sound I have noticed some paint removed from the inside of the spring and on the bump stop shaft.

Prior to the lift, I consulted with a number of jeepers concerning bump stops and they indicated if I did not go over jumps or the jeep was not dropped from any distance, they did not see the need for new bump stops. So I opted not to put bump stops on this lift project.

Question on bump stop shaft that comes from the inside top of the fender to about mid way down the spring.

  1. Do I need this shaft? Could I take a metal blade in a Sawzall and cut the metal bump stop shaft out, a little at a time as to not having to remove the spring?

I would only need to remove about ½ of this bump stop shaft.

Thanks,

Paul

97TJ, 4.0, 5speed

snipped-for-privacy@houston.rr.com

Reply to
pbarton
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Reply to
L.W.(ßill) Hughes III

I have the same problem with my bump stops -- the shaft is now pointed at the spring... sort of. Anyhow, I got the same problem after installing a 4" lift. I'd say it is due to the movement of the axle...

I don't get any noise until I go offroad, and when it flexes, the cup will contact the spring with the occasional "sproing" noise. (don't know how else to put it -- the spring gets hung up on the cup for a second the pops free).

Eric

99 TJ SE
Reply to
Eric

If I remember right, the bump stop is just a press fit. You knocked it loose by the sounds of it.

You 'really' need the bump stops or you will soon start breaking parts. If you even come down a little too hard crossing a ditch and twist up the axle you can/will blow a shock right up through into the back seat area. I saw that once on a non Jeep lifted wrong.

I have seen the shock stay solid and the frame snap in several older vehicles.

The same goes for droop. I have even snapped off one of my CJ's shock mounts when my rear wheel dropped into an unseen hole and over extended my spring.

Mike

86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's

pbart>

Reply to
Mike Romain

I'm surprised none of the Jeep kits come with axle straps.

Reply to
Dave Milne

They rely on the anti sway bars on the TJ's to limit droop, especially in the rear. The CJ's springs are usually stiff enough to limit the droop. I caught it by surprise....

Mike

Dave Milne wrote:

Reply to
Mike Romain

Reply to
L.W.(ßill) Hughes III

Not totally in the other direction at all - you make it limit the axle travel to just before the coil spring pops.

Dave Milne, Scotland '91 Grand Wagoneer, '99 TJ

Reply to
Dave Milne

Reply to
L.W.(ßill) Hughes III

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