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thats great. i had a dana/spicer locker put in my 2001 dak V6 3.9 with a 4.1 gear, a 8 1/4 axle. best money i ever spent. then a surprise my MPG went from 8-9 to 13. cause i dont drive on the hi way. this let the OD come in at 30 MPH, running a lower RPM. but i dont have the power you do, but iam good with that.