Well are you going to be driving this on the road? If yes then do not do that!! You can run that in the rear fine for even road driving. Also what are you putting this on? Do you have manual locking hubs or automatic hubs? Ifs its manual locking hub you can just disengage the front and have a spool up front and be fine on the road cause your diff wont be turning. But if you drive this on the street and have automatic hubs i would not do this at all. Im completly locked front and rear. I can drive my truck on the road fine cause i can just unllock my hubs and my front drive shaft dont spin when in 2wd. The rear end just chirps and hops around when turning. But i also dont worry bout it cause i dont drive my truck on the road. every now and then ill take it around the block just to run the motor