Jump to content

Drop Shackles

Tano53180
 Share

Recommended Posts

Brad65ford Enthusiast

Brad65ford

Posted
Posted (edited)

Been waiting to sign up on this forum for a while now and share thoughts on this subject. We've had our 2023 High country 4x4 with has Adaptive Ride for a few weeks now yet really wanted to bring down the rear just a little bit to remove the rack.  What surprised me was how different our truck sat compared to every other 4x4 1500 chevy I've seen posted, not sure if its the high country suspension is different than others?  But there was only 1  1/16" difference if that from the front to the rear fenders to the ground.   I almost drilled another set of hole since I only wanted a 1/2" drop lol.  Lucking we end up with about a 1/2" rack.  Do love the way it looks now, wishing I could go lower both front and rear but thats not going to be easy with this adaptive ride crap lol.  Not sure how much this 1/2" lowering is really going to effects the adaptive ride or not time will tell or I wont even notice. 

 

Regarding the whole shaking feeling most of us all seem to get when slowing down, yes its there.  Wondering if it is also the torque convertor at those speeds causing some of this.   Ours did it prior but it does seem a little more pronounced now (kind of livable IMHO just for the looks alone).  It happens at around 27-22 ish mph when deceleration.  I've attempted in different gears in L with different throttle / loads trying to understand how to drive around it or to create it more so.   One thing no one mentioned that also changed when we did these drop shackles is that there is now polly bushings versus rubber.  So if there was some shaking or vibration to begin with, it would only be even more pronounce now.  Also the connection point between the rear left spring and the new shackle is now farther away creating even more room for defection/vibrations.  Not saying any of this is truth, just food for thought that no one has mentioned.   Wondering if there was a drop shackle kit that had rubber bushings instead, that it might help eliminate some of that vibration we are feeling with these lower cost kits.  The concept of why it should be equal angles totally makes sense though, might have figure out how to shim it. Probably the best video explaining it.

 

Anyway, I don't have before but it wasn't much different about 1/2" higher in the rear.  This is the first set of holes not the furthest out ones. Same kit everyone else is purchasing on amazon lol.

 

IMG_2009.JPG

IMG_2010.JPG

IMG_2011.JPG

Edited by Brad65ford
  • Thanks 1
  • Replies 86
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

mafd2
mafd2

Looks good . Spinning the shim does clear the vib. I like the looks of dropping the rear to level than raising the front.

Zach-91
Zach-91

Got mine in today. Tried to install them on the higher set of holes and found that I still had about 3/4" of rake so I went ahead and went with the lower set. Also flipped around the shims just to be

19trailbossRic
19trailbossRic

Installed those 2”  dropshackles and used the 1.5” hole. Also did airbags to stop the porpoising I was experiencing while pulling a travel trailer at highway speeds over dips. I ride it 1/2” higher th

Posted Images

passat774 Enthusiast

passat774

Posted
Posted

Thanks for the further insight. I have always notices the High Country trucks have the smallest amount of rake.

 

Can anyone suggest a YouTube how to on the shims? Or has anyone made a short video the are able to share?

Brad65ford Enthusiast

Brad65ford

Posted
Posted (edited)

What i haven't done is put in neutral  (not even sure you can with all these damn nannys on the truck) to see if it still does it and if its trans related.

 

Edit:

Its confirmed, putting into neutral removes the shacking.  Totally believe its in the trans doing it, just magnified when we do shackles.

Edited by Brad65ford
Brad65ford Enthusiast

Brad65ford

Posted
Posted

Went for a 300 mile trip today, not to happy with the drop shackle mod.  Going to put the stocks back in there, the amount of shaking it does at that 30mph and lower is just to much.   

Brad65ford Enthusiast

Brad65ford

Posted
Posted (edited)

Stock shackles are back on, the shake is still there by about 60 percent less.  Assuming stock angle sucks as they come out unless its the nature of the trans and the shackles exaggerating it. 

Edited by Brad65ford
  • 2 weeks later...
passat774 Enthusiast

passat774

Posted
Posted (edited)

Had the 2 degree shim installed today and it is back to factory smooth, if you want to call it that

Edited by passat774
  • Like 1
  • 8 months later...
DwDrummer Enthusiast

DwDrummer

Posted
Posted

I had the Maxtrac 2" shackles installed on my 24 Sierra Denali yesterday and I slightly noticed the vibration/shudder on deceleration between 27-22mph, right now it's not bad enough to take them off as I like the leveled look better. Is this something that will get worse with mileage, my truck currently has 400 miles. The shop that did my install said they could do the rough country rubber bushing drop shackles but would have to figure out something to do on the adaptive ride sensor, that is the only reason for going with Maxtrac shackles as it came with a new adaptive ride bracket to keep warning lights off.thumbnail(1).thumb.jpg.c59d74f057d675308e8f81e149da50a8.jpg

  • 2 months later...
AvidR Enthusiast

AvidR

Posted
Posted
On 12/16/2023 at 12:55 PM, DwDrummer said:

I had the Maxtrac 2" shackles installed on my 24 Sierra Denali yesterday and I slightly noticed the vibration/shudder on deceleration between 27-22mph, right now it's not bad enough to take them off as I like the leveled look better. Is this something that will get worse with mileage, my truck currently has 400 miles. The shop that did my install said they could do the rough country rubber bushing drop shackles but would have to figure out something to do on the adaptive ride sensor, that is the only reason for going with Maxtrac shackles as it came with a new adaptive ride bracket to keep warning lights off.thumbnail(1).thumb.jpg.c59d74f057d675308e8f81e149da50a8.jpg

I have a 2022 GMC Elevation and would like to install the 2" drop shackles as well. You still having the slight vibration?

  • 1 month later...
DwDrummer Enthusiast

DwDrummer

Posted
Posted
On 2/25/2024 at 7:12 AM, AvidR said:

I have a 2022 GMC Elevation and would like to install the 2" drop shackles as well. You still having the slight vibration?

Sorry for the late response but yes I do have a vibration on decel from 28-22mph. My brother has a truck just like mine that is not lowered in the rear and I can just slightly tell where his is but mine is extremely noticeable compared to his truck.

  • Like 1
  • 1 month later...

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

  • Latest Articles

  • Posts

    • newdude
      Magnetic ride struts

      By newdude · Posted

      Got part #s of what you ordered vs what you got?  
    • Tommy 1960
      Magnetic ride struts

      By Tommy 1960 · Posted

    • KARNUT
      OCI, not when but why?

      By KARNUT · Posted

      Well if you insist.
    • diyer2
      OCI, not when but why?

      By diyer2 · Posted

      You have to have the last word. 
    • Chuck FB
      summer road trips in the 2026 2500HD

      By Chuck FB · Posted

      I am sure that was quite the pass experience and not a great place to experience during the winter when the conditions are not good. I've seen video of that pass and also more detailed information and pictures about the wrecks at that one hair pin turn where tractor trailers have flown right off the cliff and I am sure from all the warning signs that you know the exact curve that was !. After all there is a reason why a song was made about Wolf Creek Pass !. By the way and I didn't realize this either when I bought my truck as its nothing I even thought of that would be programmed into the cruise control and this occurs in either the basic or the more advanced cruise that controls your distance behind a vehicle and that is the brakes going down a hill are being applied as soon as the vehicle goes a certain speed over the set cruise speed. While it certainly does force downshifts in the transmission as you found out with cruise on while going down hill, its also dragging the brakes as needed to keep the speed controlled to what the cruise was set to. For me, I find that unsettling simply because I have no concept then as to how MUCH brake input is being used a and just how hot are those brakes getting and the wear factor as well. I can see that system getting a person into trouble on long mountain grades while pulling a trailer as it would not only be standing on the brakes of the pickup without any driver input, it would also be automatically applying the trailer brakes and it could cause a run away unit by overheating the brakes. Its one thing on a shorter hill and if the driver allows it to do its thing but on a long mountain grade is where things could get so out of hand. As someone a while back on this forum said, they had someone following them at night I believe on a down grade and had the cruise set and the person behind them could see the brake lights being energized all the way down the hill. I figured when I saw your comment that you didn't know and would have no way of knowing that your truck was applying the brakes and that you would and rightfully so assume you only used the brakes when you pressed on the pedal to slow down more than the cruise set speed for the slower sharp curves. So its good knowledge to know this about the newer GM trucks, certainly when doing any descending on long mountain grades. In the future try kicking off the cruise and use the the manual mode on a pass to see what that is like as I know myself when I first experienced it I thought no way can this engine be holding me back this well and tried the same hill in manual mode and sure enough the engine was revving way up and still could not hold the trucks speed down like it could in cruise mode.    Fuel mileage, that is where a really low sleek type of car can do better at higher speeds, certainly it starts sucking fuel too but a tall pickup is pushing massive amounts of air and also allowing a lot more air under it and the tow mirrors as in elephant ears pushing through the wind  as well. Driving like grandpa is about as good as one can do when driving one of these if trying to get the best fuel economy they can. I bet these trucks would get the best mileage they can if driven on a freeway in Florida if not busy traffic at a sedate speed and that sea level elevation without hills, vastly different then Colorado !. 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...