Jump to content

Cognito Leveling kit and Major front end vibrations!!!!

easy_streat82

By easy_streat82
in Modifications & Accessories

 Share

Recommended Posts

easy_streat82 New Member

easy_streat82

Posted
Posted

I got my truck a few months ago and put a Cognito Leveling kit on that included the UCAs, Keys, Pit and Idler arm supports, Front Shock spacers and Fox 2.0 on all 4 corners. Been fighting it for several months to get it right, but there has been a HORIBLE front end vibration ever since it was put on. I was very confused by this and thought it was wheel tire issue so had dealer look into it since this is almost the same setup I had on my 2015 Silverado 3500 SRW truck that drove and handled like a sports car. To make a long story short I kept dropping the keys a bit at a time to try to get the vibrations to settle out since a mechanic friend said its probably the CV angle causing the vibrations. As I have been dropping it was getting better but still not right. I finally got fed up and pulled the Cognito keys out today and put the factory keys back in but cranked up. The front is about 1/4" lower than the rear but I am still getting a very bad vibration. I have been reading on here on other posts about people using what sounds like the same Cognito kit, all Cognito told me was keep turning the keys down till it goes away. Well at that point if it brings it back to the factory level what's the point of the kit? I would like to go back up with it to level if at all possible but need to make sure I can get my ride and handling back. Any help or pointing in the right direction would be greatly appreciate.

 

I also just went on to the Cognito website and noticed there is another set of UCAs that they offer. Those look more like the ones I had on my last truck. anyone know what the differences are between them?

2019 3500.jpg

2019 3500 cognito pic1.jpg

2019 3500 cognito pic2.jpg

EJCarter Enthusiast

EJCarter

Posted
Posted

Did the Cognito kit come with diff drop spacers? If not, I would add these. It will lower the diff a little which will decrease your CV angle...

 

Pic is one of my rear spacers...

 

diff drop rear.JPG

  • 2 weeks later...
spiritwalker Enthusiast

spiritwalker

Posted
Posted

Following. I have the same kit minus the fox shocks.

To the last poster, these kits do not come with diff spacers however I have seen other brand kits include them.



Sent from my SM-G950U using Tapatalk

EJCarter Enthusiast

EJCarter

Posted
Posted

Just FYI if there is interest...

 

CCM sells just the diff drop spacers too. They will fit 2011-present 2500/3500 trucks. Works with all brands of leveling or lift kits. It comes with (4) spacers, (4) longer bolts, and washers.

$45.00. There are quite a few good reviews where adding these spacers eliminated the vibration.

www.ccmoffroad.com

  • Like 2
  • 2 weeks later...
  • 10 months later...
Thielio20 New Member

Thielio20

Posted
Posted

Did you ever get an alignment after you installed the kit? I know it's obvious but maybe it's a step you missed.

MikeLee661 Enthusiast

MikeLee661

Posted
Posted
X2 on the diff drop.

Does the diff drop matter that much? I am kinda worried now I'm going to one lol.
gearheadesw Senior Enthusiast

gearheadesw

Posted
Posted
On 12/11/2020 at 2:56 AM, MikeLee661 said:


Does the diff drop matter that much? I am kinda worried now I'm going to one lol.

 

 

It helps the angle that the front axles come out of the differential, the rubber boots aren't  bunch up on the top and bottom with the little fins touching. The axle itself is more parallel to the ground, as you are dropping the diff down slightly to get that angle back to stock.

  • Like 2

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.4k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,764
    Total Members
    8,960
    Most Online
    Tbhats2130
    Newest Member
    Tbhats2130
    Joined

  • Who's Online   5 Members, 0 Anonymous, 1,046 Guests (See full list)

  • Latest Articles

  • Posts

    • KARNUT
      Wow I'm in a pickle. (Broke down truck) and a story.

      By KARNUT · Posted

      Google converting 98 4.3 spider injection to carburetor if all else fails. 
    • Hoginedgewood
      MPG Surprise

      By Hoginedgewood · Posted

      That computer lies!
    • Tbhats2130
      2018 Silverado Console USB Port Not Working

      By Tbhats2130 · Posted

      My centre console USB ports haven’t been working and the one in the glovebox is starting to act up. When I plug my phone into the cord the radio will go black and stop playing, and the CarPlay is inconsistent.   I checked the fuses and they were fine. I changed the USB port out and still nothing. Hoping for some advice on what I should be looking at.  
    • Atlas
      Wow I'm in a pickle. (Broke down truck) and a story.

      By Atlas · Posted

      The truck is a 1995 Chevrolet S10 Blazer, 4.3 VIN "W" engine. :cracks knuckles:   On a whim - because I needed a headache - this truck was for sale so I stopped to take a look. Doesn't run. Well, it does, but barely. Long crank, choppy idle, bad misfire(s), it REEKS of fuel. I can DO this..I'm thinking. Diamond in the rough. One owner until last year. A young guy is selling it, he bought it 6 months ago. It stranded him more than once, he's got a newborn. It was in the shop 10 days ago and he "thinks" they said it needs a new fuel injection system. He can't put any more money into it, needs it gone. I was thinking of upgrading my Macbook, which is a total want, not a need. For less than the price of a new laptop I can have fun for months tinkering on this truck and enjoying it. I'm taking this truck home. The guy was beyond thrilled, his wife was there, she thanked me profusely, I could tell they were hurting. They seemed like good people in a bind.   Some parts, a wash, maybe a set of tires, and I can have a few months of fun and then turn it for beer money (or the next project).   Sure enough, there's a work order from a shop last week in the INCHES of paperwork on this truck dating back to when the first owner bought it. They put a new distributor in it, fuel injection work describes basically opening the plenum and putting it back together. He said he couldn't afford any more work so he had them button it up and that's when he put it up for sale.   I'm not well versed in 4.3. I did discover 1995 uses the 1992-1995 SCPI "Spider" injector which is riddled with issues from splitting lines, clogged or cracked poppet valves and plastic spider legs that crumble over time. Cool. I'll just order me a ne---. Oh, the auto parts store doesn't have it? Rock Auto doesn't have it. eBay? $$$$$$ for used. These are UNAVAILABLE period end of story unless you know "a guy" who's still got one in a box somewhere.   Can't upgrade to the '96-'04 injector, it's a different plenum, wiring/pinout and sensor config.   There are a few kinda "know a guy" -guy rebuild services for these injectors out there for about $350. Okay, Okay... I'd like to know if anyone has used them? Anyone got a lead on these crappy 92-95 spiders?   I also don't want to send MY spider to Narnia and back without knowing if that's truly the problem. I guess I'll need to pull apart the plenum and do some digging.   I was also thrown for a loop. This 1995 model year truck has an OBD-II connector. The interface is decidedly not OBD-II. I can read and reset trouble codes and view live data, but there's not a lot of data. Like misfire count and on what cylinder, that's not there. It's OBD-1.5.   Nothing is ever easy. Now it makes sense why this guy wanted to disappear this thing for cheap. I'm guessing the shop told him the injector is toast, the part is unobtainable and they're not going to sort sending the thing to a rando offering rebuild service on craigslist, and the kid likely can't be without a working car for 3 weeks even if they'd facilitate that.   Experience with these early SCPI's? Stories? Things to check? Sympathy? (..Nah...)   This can sit until I sort it. But I haven't had a problem with a vehicle I couldn't easily solve in a long time.    
    • Grumpy Bear
      OCI, not when but why?

      By Grumpy Bear · Posted

      I have four that read by the dash 8 to 10% better than miles/pump calculations and I have one that is spot on. 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...