OEM vs Aftermarket http://www.bluetopsteeringgears.com/apps/photos/ OEM vs Aftermarket Ford OEM Ford OEM top cover adjustment screw with allen wrench top to screw. All OEM gears have only 4 or 2 (pre 1997) bolts holding on this cover. Some aftermarket gears have 6 bolts for this cover. http://www.bluetopsteeringgears.com/apps/photos/photo?photoID=205123588 205123588 Ford clone aftermarket Aftermarket Ford clone adjustment screw. Always have a flat blade screwdriver slot instead of an allen wrench. http://www.bluetopsteeringgears.com/apps/photos/photo?photoID=205123589 205123589 Ford OEM valve housing Ford OEM valve housing. Has 2 depression rings around valve body http://www.bluetopsteeringgears.com/apps/photos/photo?photoID=205123590 205123590 Ford aftermarket valve housing Aftermarket valve housing has 1 depression ring around the body http://www.bluetopsteeringgears.com/apps/photos/photo?photoID=205123591 205123591 OEM vs Aftermarket Aftermarket input shaft (top) missing the torsion bar stud. OEM input shaft (bottom painted black) with torsion bar stud sticking out 1/4" +. http://www.bluetopsteeringgears.com/apps/photos/photo?photoID=205123592 205123592 Aftermarket Input shaft Aftermarket input shaft showing the missing torsion bar nipple missing which the OEM has sticking out. http://www.bluetopsteeringgears.com/apps/photos/photo?photoID=205123593 205123593