GQ spring lift vibs.

Submitted: Saturday, Sep 14, 2002 at 00:00
ThreadID: 1976 Views:1359 Replies:4 FollowUps:1
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I have just installed 40mm lift springs in my GQ and despite assurances by the manufacturer I have developed a vibration between 80 and 90 kph and over about 115 kph. Its not bad but its annoying, has anyone got any ideas or advice? I had a wheel alignment as soon as I fitted the springs.
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Reply By: shane - Saturday, Sep 14, 2002 at 00:00

Saturday, Sep 14, 2002 at 00:00
is that with the hubs locked in?
could be:
front tailshaft slip joint.
rear tailshaft slip joint.
uni joints.
wheel balance.
caster. maybe fit caster bushes to fix it. ARB 2.5 degree.

The vibration is always there but suspension lifts usually make it worse.
but make sure the rubber rings are still on top of your springs.
can't think of anything else,

shane
AnswerID: 6606

Reply By: Rob - Saturday, Sep 14, 2002 at 00:00

Saturday, Sep 14, 2002 at 00:00
If it is a swb it will probably be the angle of the rear tailshaft.

You can insert a 12mm packer between the chasis rail & the cross member on each side which will drop the gearbox & reduce the angle.

Also drop in & join the Yahoo patrol group at http://groups.yahoo.com/group/Patrol4WD/
AnswerID: 6617

Follow Up By: Mark - Sunday, Sep 15, 2002 at 00:00

Sunday, Sep 15, 2002 at 00:00
Thanks for that guys, it's a long wheel base and the caster came up ok so it must be in the drive line somewhere. I'll have a think about whether I can put up with it or not, might even buy some standerd height springs if all else fails. I am just a bit worried about wear and tear even though it's not a bad vibration.
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FollowupID: 2976

Reply By: Member - Nigel - Sunday, Sep 15, 2002 at 00:00

Sunday, Sep 15, 2002 at 00:00
There have been several good replies to similar questions in 4WD Monthly. I got an OME lift for my 95 GQ Wagon, which was 50mm above standard, but ended up being 75 mm over the sagged originals. I didn't have any vibrations, just exceptional handling. I'd recommend aftermarket suspension to anyone.
AnswerID: 6627

Reply By: Gray - Tuesday, Sep 17, 2002 at 00:00

Tuesday, Sep 17, 2002 at 00:00
Hi mate, As you increase the driveshaft angle the uni joint gains more work load and if slightly worn a vibration can appear it can also happen doing the opposite.(reducing angle)
AnswerID: 6707

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