JON BAILEY

Thanks for the info. Just concerned about all I have been reading on driveline angles and harmonic vibration

OK... So I think I got my UCA issue figured out, so now onto the next issue. I leveled my 2014 GMC Sierra 1500 with Bilstein 6112 and added 5100 in the rear. Perfectly level, but I haul a bit and would like to get a bit of the rack back so I am not riding nose high when hauling. I have read just about every forum post out their on flat vs. tapered lift blocks. I would like to go with 2 - 2.25 block in the rear. Flat vs tapered. It makes total sense to me to use flat blocks to keep the pinion angles the same. I have read many threads about how folks are getting a vibration when using tapered. So I have been looking for flat blocks everywhere. I have ordered superlift, readylift, mammouth, bison, etc... all claiming to be flat, but all coming with a 1/4" taper. I want to do this right and not have to redo it if I get the vibration. Do FLAT rear lift blocks exist for a 2014 GMC Sierra 1500?? If so where??? What manufacturer. I know I can leave it as is and live with it, but if I could find some flat blocks I would really like to try it. So I am asking for your help!!! Jonny B.

OK.. Another question for all of you that undoubtedly no more than I do. Looks like finding a beefier UCA that does not rub with my set-up could be like finding a unicorn... What about Mevotech UCA. They seem to be closer to the stock ones, but a bit more durable. Any thoughts, opr experience with these?? JonnyB

Thanks for the info. I have a little time to think on it... I have no interest in spacers, and there is nothing wrong with my wheels so need to replace.

I have a 2014 GMC Sierra Z71 SLT. I put Bilstein 6112 up front and 5100 in the rear. I also gave the girl some new new shoes. Nothing crazy just some Copper Discovery AT4s and I went from 275 55 20 to 275 60 20. My question is... I need some new UCA's. Mine are going and I am having a heck of time figuring out what will fit with my set-up. I am 80% highway and 20% offroad. When I am off road I am in the backcountry in the mountains of CO. I need some articulation to go from point A to point B, but I am not going wheeling as a pastime. I worry that the stock UCA's might be an issue with the level even though it is only 1.8", but I can not fit any of the quality aftermarket ones that will fit my set up. I don't need new wheels, or any of that. It is not a cosmetic thing for me. Just wanted a better suspension and more clearance. Any Suggestions???? I thought for sure the Cognito UCA's would work, but they say they won't clear because I increase the tire size. Also.. sorry for my ignorance on this subject. I am no the guy that will spend all my time doing mods to my truck. I just want it to get me where I need to go and would like some advice on how to make that happen. JonnyB