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active · 21-07-2008

if you are speaking about AR33 4x4 and P4. so they are the same, just P4 has electromagneting coupling for disengaging 4x4 system (needed for abs) and viscous coupling which is better choise for driving on hard surfaces.

But if you are talking about Q4 system which is used on AR155, AR164. So it's pretty diferent things.

21-07-2008	#9 (Post Link)
active Newbie Join Date: Oct 2007 Posts: 10 Member car: alfa 33 16v P4	Re: Q4 vs Permanet if you are speaking about AR33 4x4 and P4. so they are the same, just P4 has electromagneting coupling for disengaging 4x4 system (needed for abs) and viscous coupling which is better choise for driving on hard surfaces. But if you are talking about Q4 system which is used on AR155, AR164. So it's pretty diferent things.