rear differential compatability | Ford Explorer - Ford Ranger Forums - Serious Explorations
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rear differential compatability


New Member
May 23, 2017
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Year, Model & Trim Level
2005 Explorer XLT 4WD
My 2002 XLT 4.0 4WD has the dreaded diff whine which is now steadily getting worse. I'm thinking the easiest remedy would be to replace the rear-end with a used one. I've already changed the fluid with no effect.

Since the whine problem seems to have been fixed after 2005, is the 2006+ rear a direct swap? Or that from the 2005+ Mustang? My axle code is 45, which is a 3.55 open diff.


I don't have the cross reference book, but I can tell you that looking on the door sticker for, "code 45" is the easiest way to search the junque yard. (Been there, whined that.)

Rock auto shows the same part numbers for the 31 spline 8.8" Eaton posi rear differential between the 2002 and a 2006. They also show the same part numbers for the front as well with the Dana 30, 27 spline.