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I was wondering: while I am replacing the noisy pinion bearings in my 99 durango .....can I use one of the older type posi units from the 80's in the 9.25 housing. I want to use the older type because it is spring pre-loaded much like an auburn unit. With 233k on it the original trac-lok is more worn out than Joan Rivers these days. I see lots of the mid 80's trucks in the local junkyards around here are they a 31 spline as well? :huh:
 
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