Clunking front end when braking or release

I have a K5 and one last nerve. I have taken my vehicle to about 10 mechanics now in the last three months with no answers as of yet. The issue: when I apply the brake, something in the front end (which I can feel through the brake pedal) clunks into place. When I take my foot off the brake before the vehicle even moves, this thing seems to clunk out of place. Sometimes this seems to jerk the steering column ever so slightly which terrifies me to think this is all connected somehow. I feel as if something in the front end will brake off onto the ground maybe while I am driving down the freeway, or perhaps I will not be able to stop when needed or even that I may lose my steering. I just had the rear differential replaced as well as pitman and idler arms. I have heard that this issue could be the transmission but just got a thumbs up on that and was advised perhaps it is the transfer case but not sure I understand why that would be affected when I am not even accelerating but then again I am not a mechanic. Funny thing is that this problem is very inconsistent several blocks of braking no problem then all of a sudden it feels like my blazer is all kinds of broken. Also it seems like when the mechanics look it over the problem ceases for a day or two then it comes back and I think this is because parts are removed and then returned and somehow this is affecting things. The best I can figure, this all seemed to begin very mildly last December when I first began to use the 4X4 in the snow sparingly on about 4 occassions; not sure if this is related though. I just made another post about crackling which is brand new issue for me. I am so frustrated and broke, I can not afford another vehicle and I do love my blazer but I don't want to feel like I am gonna die either. Someone please help; I just don't know what to do at this point. :frown::banghead:

When you release the brake pedal, does it ever feel like it's holding the vehicle from moving before you hear the "pop"? I replaced the front calipers on mine last year and had some clearance issues that caused the right front brake to lock very slightly. Once it "popped", the truck would move fine. If you have time, remove the front brake calipers and give them a good cleaning, including chipping away built up brake dust and giving the pins a good cleaning as well. I also had the driver's side shock piston seperate from the shaft and would give kind-of a pop when braking or taking off. I veryfied that by removing the shock and then getting an oil shower when the shaft blew out of the shock body. The shock was only 18 months old. My last guess at this point would be the sway bar ends. My son jumped it onto a curb when he was learning to drive and broke the sway bar bracket off of the driver's side lower control arm. I looked twice because of the front end making a popping noise and didn't see it because it just wasn't out of place enough to grab my attention.

Good luck.

these vehicles are notorious for clunking noise from worn bushings when stopping or starting. not a saftey issue, but easy to fix. check by bouncing up and down on the front bumper and rocking the vehicle back and forward to see if you get the clunking noise.

Could be any number of things including worn control arm bushings, worn brake hardware, worn steering knuckle, worn or loose wheel bearing or hub, sway bar end links, or loose ball joints to name a few. Does your K5 have coil springs or leaf springs in front?