tailshaft play, or back lash in the diff. my old diff did both these. does the clunk happen when you lift off the accelerator? or when a gear is upshifted? now with my lsd, which has had a fair share of flogging does an occasional clunk. id replace the diff oil and see if there is any change
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AU1 Forte - 17'' AU2 Tickford rims on all corners, Super low springs,
KYB shock absorbs + camber castor kit and a 3.45 LSD, Tickford snorkel,
3" mandrel intake, K&N pod in the box, Polished Rocker Cover.
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