Im going to have a eaton posi carrier along with 3.73 gears installed in to my differential and ive read that I should upgrade the diff cover as well to add structural support. T/A performance as well as summit racing make good covers for this porpose but they range from 149.99 to 160.00. If anyone has either brand or one compatable that is used but in good condition and you're willing to sell for less pelease PM me. Thanks Matt