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		Hi everyone.
  Rather than start a new topic I thought I should post this here.
   I have just fit the 4:11 ashcroft CWP's to my RRC.    They are disturbingly noisy at around 70 to 80 kmh.  Had a quick search around the web and a few have made the same comment due to the lower tooth count etc.:eek:
   I pulled the rear and had another crack at setting it up and has made no difference at all.   So far I have only travelled around 2500 Ks with it like this and I cant imagine they will last too long with the vehicle being used as a mile muncher.  
     Not sure what else to do aside getting the gears lapped?   Be an expensive job.
http://http://www.aulro.com/afvb/att...1&d=1375708771
	 
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		Just wondering if anyone had changed diff ratios on D3s/4s, is it possible ?
	 
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		Road Speed = RPM x 60 / overall gear ratio x tyre revs. per kilometre.
	 
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		I had Ashcroft 4.11:1 gears in my disco for quite a few years and never noticed any noise at all, and had muddies most, but not all of the time.