The unit you are referring to has a Detroit Locker in it.
The down side is that it will cause increased tire wear and possibly some loss of control in slippery conditions(ice/snow,etc)
The up-side is that it will have better traction.It will make some clunk/bang noise when it goes around corners under heavy throttle but that is normal.
How much are they asking for the unit and what gear ratios are the units?


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