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The Terminator
Driveline
03 IRS: Speed sensitive 'clunking'
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<blockquote data-quote="03SVTCOBRA10TH" data-source="post: 7968710" data-attributes="member: 11983"><p>This is one of the causes.</p><p></p><p>The problem is that the setting up of the diff, especially after a gear ratio change, affects the pinion depth. It must be corrected as well as back lash.</p><p></p><p>The other problem is that the diff center section is not soild or fixed to the car, it has rubber bushings. It really need soild aluminum mounts like the MM kit or bruces kit. Then you will notice increased NVH inside the car. To solve the problem you need Dyna mat or some other sound absorbing matierial. Then you need to soild mount the IRS sub frame to the car with the SHM aluminum bushings or the KB hard tail mount. Again NVH can be corrected with sound deadening.</p><p></p><p>Once the diff is set up correctly, the center section is hard mounted and the IRS subframe is hard mounted and the NVH is deadened, then you will have not rear end clunk. You may have noise if the wheel bearing or CV joint is shot, or is the suspension ismaking noise but not the rearend.</p></blockquote><p></p>
[QUOTE="03SVTCOBRA10TH, post: 7968710, member: 11983"] This is one of the causes. The problem is that the setting up of the diff, especially after a gear ratio change, affects the pinion depth. It must be corrected as well as back lash. The other problem is that the diff center section is not soild or fixed to the car, it has rubber bushings. It really need soild aluminum mounts like the MM kit or bruces kit. Then you will notice increased NVH inside the car. To solve the problem you need Dyna mat or some other sound absorbing matierial. Then you need to soild mount the IRS sub frame to the car with the SHM aluminum bushings or the KB hard tail mount. Again NVH can be corrected with sound deadening. Once the diff is set up correctly, the center section is hard mounted and the IRS subframe is hard mounted and the NVH is deadened, then you will have not rear end clunk. You may have noise if the wheel bearing or CV joint is shot, or is the suspension ismaking noise but not the rearend. [/QUOTE]
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03 IRS: Speed sensitive 'clunking'
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