The Detroit TrueTrac Limited Slip is an all gear driven clutchless differential. The TrueTrac will automatically provide smooth transfer of power from the slipping wheel to the non slipping wheel to help you out of a jam. With no clutches to wear out, you will have a dependable long lasting Limited Slip differential.
Can I use it on jku 4doors 2013 dana30 27spline 3.21ratio? What bearing can be use?
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Yes that is the correct unit for the 3.21 gears the bearings are kit D/S 706016x which has both bearings and races. If you decide down the road to go lower gears 373's 410's you would have to replace the TrueTrac again.
The Eaton Corporation has enjoyed over a century of innovation and is in the business of powering Jeeps with a top-rate lineup of lockers, open differentials and limited slips. Traction performance is critical while jeeping and we carry Eaton components for upgrading vehicle traction. Compatible with different axle splines and various gears, these parts are often rebuildable and are top performers on and off-road. Eaton's rich tradition of engineering innovative, dependable products extends to off-road parts and accessories for 4x4s and they have evolved to become the industry standard in differentials, lockers and limited slips. Shop Eaton Now