My K30 makes alot of clunking and shuddering from the rear while braking. It only happens on ice/snow (ie. slippery conditions). Sometimes it is only one large 'clunk' (when very slippery -ice) or multiple shudders (when not as slippery - snowy roads). I have 4" lift blocks in the rear and 38" tires. Is this common? SHould I be concerned? I get no axle hop when accelerating or under load, just when braking. I'm assuming the it's rear axle hop when braking.
I'm not 100% sure it's axle hop, just assuming it is. The rear has a Detroit locker in it. Is this common on detroit equipped vehicles? I would have never suspected the locker but I guess it is possible.