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Detroit Locker

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We had to put our Superior Axle & Gear 4.11 ring gear (PN F90411) in the oven at about 250 degrees and put the 31-spline Eaton Detroit Locker (PN 187SL17B) in the freezer to get them to fit together. Never try to pull the ring gear to the carrier with the ring gear bolts. The ring gear should be sitting flat on the carrier before installing and torquing the bolts to 70 lb-ft. Use a rubber dead-blow or brass hammer to help knock the heated gear into place if need be.