2008 SE 4lo makes noise on the trail

[Swanny69]

so a little bit about my rig
2008 SE V8 AWD
Icon Stage 2 lift, with total chaos UCAs
Icon 2.5 remote resi in the rear.
285x70x17 Good year Duratracs, 17 method wheels
Body mount chop

I did a search for this but couldnt fine the results.

Im on the trail and engage 4lo with no problem with car in Neutral.
as i start my ascent on the hill my front end seems to make a grinding or vibration noise (really hard to explain)The noise only happens when my front tires seem to bump off rocks or ledges, No lights or warnings or beeps come on the dash!

Any help on this issue is greatly appreciated.

Thanks

 

[BlackWorksInc]

Sounds like it could be ATRAC trying to help get you more grip as it feels the tires losing grip momentarily? I don't normally run my '04 V8 4WD in 4Lo so I couldn't tell you, but ATRAC does become more aggressive in 4Lo