Major brake problem after lift

[shyster7]

I have a 05 CC 2wd 1500 that I lifted 7" with the fabtech crossmember kit. I also have 20X10 welds with BFG 35's.
My problem is after the lift i have a severe shaking that occurs during mild braking at about 25-40 MPH. Aside from this the truck seems to drive great. I have gone though and made sure the parts are all tight but have found nothing. Fabtech is telling me my tires are too big but i swear i have seen many trucks with the same combo. Will upgrading the rear drums to disk help the problem or is it not the brakes themself but and actual suspension problem. The steering wheel doesnt seem to be shaking during the braking but i cant tell for sure if it is the front or back. When i get a chance i will put the stocks back on and test it. Until then are there any sugestions?

[whiskeytown]

my brother had a shaking problem on his old truck when he would break and he went and got his rotors turned and that seem to clear the promblem...not saying thats what it is but u may want to look into that if you have never changed out your brakes or never had your rotors turned...but being an 05 you shouldn't have to deal with that stuff already...good luck

[Bad-Intentions]

Are your rims hubcentric if not it can cause shaking because the wheels are not perfectly center.

[fabtech_chevy]

Are your rims hubcentric if not it can cause shaking because the wheels are not perfectly center.

mine does it too... and its not the rims, cause mine did it stock too... wasnt the brakes cause ALL mine are new.. i think it just does it cause the coils are compressing and trying to push out some...

[shyster7]

Im not sure if my wheels are hubcentric. If it was a problem with them not being centered i would think the problem would be obvious at freeway speeds. It couldnt hurt to have my roters turned and buy new pads. Maybe i will give that a try this weekend.
If there are any other sugestions let me know. I would really like to find someone with the same setup to know it is not the wheel size.

[97rcsb]

is this shaking during breaking only or is it after you hit the breaks while drving ~40 but dont stop does it do it on the highway? also where does the shaking come from? i know you said you couldnt tell but maybe get a friend to drive along side you and try to make it shake

have you gone mudding recently? cuz i tore some big ruts in the treads of my tires...enough to get them out of balance and looked forever to see what was wrong

[20002wdchevy]

ya do what 97rcsb said and check your wheels and if thats not it check your rear brakes. it is kind of odd though that you had no problem whatsoever before and now the lift is installed and it had problems. you said you checked all the bolts and all. mine did the same thing, turns out my rear rotors were super warped.

[shyster7]

The shaking only occurs when i am braking to slow down. As soon as i let off the brake it stops.
When i get a chance i will have someone drive along me to try and narrow down the problem.
One concern of mine is that the rear drums may be insufficient to stop the larger wheel. What are my options for upgrading? Can i purchase a rear setup on a pre 05 and simply bolt it up, or are the mounts totally different. I really dont have the coin to drop 5 grand on a set of baer brakes at the moment.
And no i have not gone mudding recently. I have only bolted up the kit and driven it to work for about 3 days now.

[Fishnfergie]

Isn't their some clip you have to take off of the drums when getting after market wheels?

[fabtech_chevy]

do you have a tall block?? i just thought of it now, but it could be driveshaft vibration or axle wrap... just a thought

[97rcsb]

do you have a tall block?? i just thought of it now, but it could be driveshaft vibration or axle wrap... just a thought

if that were the case then it would vibrate all the time not just when braking

i dont think youll have to go so far as to replace everyhting....your rear drum brakes shouldnt be insufficient to stop your new tires/wheels.....remember something like 70%(im not sure if thats right but its a majority of it) of your stopping power comes from your front brakes that being said i think its probably something in the front end....most likely your rotors so go have them turned...it wouldnt hurt anything to do it anyway

[justgrouchy2]

it could be your antilock brakes. that what was wrong with mine. just disconnect one of the sensors to the front wheel and see if it stops. i just disabled the antilock and it brakes just fine

[shyster7]

Well I am happy to report the problem is fixed. At the same time I was pissed to find out what it was. Fishnfergie gets a star for the day. When the new wheels were put on the rear the clips were not removed. Im perplexed as to why it didnt shake at freeway speeds but only when braking. Thank you for all of the input on this subject.

Greg

[1bad05]

so these clips, are they something that the tire shop should remove? ive got aftermarket wheels now but im getting ready to go from 265's to 35's in the next couple weeks. will i have a problem when i put the 35's on or would i already notice the vibration with the 265's?

[shyster7]

The clips are the metal retaining rings that slide onto the wheel studs. The wheel shop should remove them when aftermarket wheels are installed. The stock wheels have a recess machined into the mounting face so they dont interfere with eachother. Aftermarket wheels (or at least mine) do not have the relief cut into it. If you dont have any problems now they have most likely already been removed and would not worry about it. I put the wheels on myself and was unaware of the potential problem.

Greg