Outer Limits 4x4 Board

Hey all, just ironing some bugs out of the new rig and here they are,

got a weird rattle coming from the front diff or cvs only when the hubs are locked in, a bit louder when transfer is in 4x4. sounds louder from the rhs but not sure, i'm thinking cv but would like a second opion.

also when in 4x4 high cruising about 50k's and you are in between accelerating and decelerating (just faintly toughing the gas) there is a backlash uni weird noise from the rear diff maybe. only in 4x4 though?

lastly, just cruising with the revs about 1500rpm there is a intemident miss (not bad but its there)

thanks all ....

sounds like u need a tune to fix backfire, not much tho, front end issue id put down to freewheeling hubs, but the rear im not to sure about, check grease in slip joint?