I had the same problem when they 1st came out years ago.The od. is too big. I called DMI and got the old "we never heard of that before".... Call winters they make a billet alluminum u-joint assembly for a midget.Iv'e had the same one in for 2 yrs with no problems. It's the same part number as the sprint u-joint but add -M after the number. Steve Buckwalter