3rd gen 4Runner bad front end shaking in brakes

Hi guys just did the tundra caliper upgrade on my wife’s 2000 4Runner 4x4 limited. Had a problem with the booster being a Tacoma booster. Installed the correct one. And extended the throw of the booster just a bit. Calipers where sticking. One day the truck just started to shake violently in the front end. Driving down the highway, started around 40 with a real light vibration and turns into a baddd vibration jolting the car feeling like you popped a tire almost. It did this on two occasions the brakes smelled baddd so the calipers had to be sticking. Went to drive it to my dads garage to check it out. And the brakes just didn’t work pedal to the floor then it would stop after about a second of the pedal to the floor. Checked it out my mechanic changed the already brand new booster and it was bad. He installed a new one and it seemed to fix the problem just fine for about a week. Braked well no calipers sticking. All of a sudden it started to do the same thing shake violently in the front end around highway speeds. I’m am completely stumped. When I did the tundra upgrade installed new rotors, pads, calipers, master cylinder and brake booster. Only thing I could think it could be is a bad calipers. They where cheapies from Amazon. But it confuses me because changing the booster seemed to fix the issue until a week went by and it started to do it again. Any ideas or idea on what it might be?

 

Bump

 

I have a 3rd gen myself. I don't have the tundra brake "upgrade" on mine but read plenty about it on t4r.org , maybe there are some answers over there for you.

 

I read a bunch or stuff over there can’t find anything specific to my problem. I made a account to post but they won’t let me post a thread yet haha. Thanks for the reply bradddda. I’m gonna really look at it tomorrow. I’ll update this thread when I fix the problem for future references.

by the way you should totally do the upgrade to tundra brakes. I have it on my 03 Tacoma and it’s really a amazing upgrade for a low cost. A lot more braking power

 

for future help on this fix. I believe I figured it out. When I got my pads for the 2005 tundra they sent me 4 pad clips. I dont know why I didn’t check my Tacoma or look it up but I put 2 clips on each caliper. One on the top and one on the bottom of the pads of each caliper. I took off that bottom clip as that’s the OEM orientation. Fixed the problem. I think that it was just enough pressure to keep the pads applied every once in a while causing the jolting in the brakes. Along with my booster knob on the inside being adjusted just a little to far out. I adjusted thatwith a master cylinder adjustment tool and the pedal feel increased immensely. The pedal was not contacting the rod soon enough because it was to far adjusted out. This fixed the problem! The pedal still feels a little little soft so I’m going to try changing the gasket between the master and booster to the OEM paper gasket see if that helps.