This is the Lightweight Diff Assembly for the TC3. YOU WILL RECEIVE: Two washers #6573 One diff bolt #6575 Six thrust balls #6574 One spring #6582 Two brass bushing #3907 Two diff rings #3906 One long hub #3908 One short outdrive #3908 (same as above) One 2-56 locknut #3904 One ring gear #3914 Twelve diff balls #6581 One diff bolt cover #3908 (same as above) REQUIREMENTS: Diff Lube (ASCC4691) Assembly 5/64" Allen wrench Shim set (ASCC3911) Bearing set (ASCC3976)