My immediate reasction is design feature, unles you know that its got worse over time. Mine isn't the best example as it has a 7.5 ins diif as opposed to the more normal 7 inch and also is not trimmed so there is only a thin piece of stainless between me and the diff!!. There is a lot of dif noise and clunking, which I have always believed is due to the fact that the rubber coupling is removed and therefore any drive differences between gearbox and driveshafts manifests as clunking due to taking up the backlash. I am not sure what the backlash tolerance is; certainly it isn't insignificant, but is pretty easy to measure if you have a dial gauge. I have had two diffs and both behaved similarly. I too have noise on overrun, but am pretty sure mine is the gearbox, which does need to come out for a recondition, bvut this will be a job for its next winter hibernation. Before spending £500, which seems hellish high to me, I would hitch a ride in another Xtreme and compare notes.
There is another potential source of noise caused by the rear hubs not being machined to sufficient a diameter to clear the alum ABS ring on driveshafts fitted from Sierras that had ABS. The solution on mine was simply to machine away the teeth to get clearance. Nigel -- You received this message because you are subscribed to the Google Groups "Quantum Owners Group" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/quantumowners?hl=en IMPORTANT NOTE: All information presented herewith is provided on an "As Is" basis, without warranty or the implication thereof. Neither the Quantum Owners Club nor the individuals associated with the Quantum Owners Club or in the preparation of the above information shall have any liability to any person or entity with respect to liability, loss, or damage caused or alleged to be caused directly or indirectly by the instructions contained within this or related message(s).
