Comments: Per the vendor universal joint JLG p/n 8007770(Dana p/n 212.06.610.03) is no longer available and does NOT have a direct replacement. Before ordering service replacement parts you must first verify the vendor p/n stamped on the universal joint. If your universal joint is stamped with Dana p/n 212.06.610.03 you must order qty. 2 of JLG p/n 70023105 and replace both universal joints at the same time. If your universal joint is stamped with Dana p/n 212.06.610.17(JLG p/n 70023105 you can replace on an as needed basis.10/20/2009 - All information contained in this C.F. as per Lori Kerch - Orrville Tech Pubs. 8/12/2013 - Per Lori Kerch and the vendor this C.F. is no longer required. It has been comfirmed p/n 8007770 can be superseded by p/n 70023105, both u-joints do not need replaced at the same time. C.F. has been turned "off", but history should remain.