2017 Yukon build - just put on 24s now have bump steer like symptoms

[Matt Fox]

Whats up fellas - don't really post on these forums much but looking for some input on a few things. And appreciate ahead of time all of the responses.

First thing i did was drop the stock rims and throw on some 24s -

DUBS Future 24x10 +30 offset
Pirelli 305/35R24

This is where I started getting the bump steer like symptoms with vibration at 70-85mph. Before with stock rims it rode like a dream. I went back to place where I got rims installed- balanced and got an alignment. Helped the vibration a little bit but still have the bump steer like symptoms. Any ideas on this? I read other threads and some people recommended hub centric rings. So i will give those a shot.

But wondering if I need to upgrade sway bar or steering stabilizer?

Also looking to level out my ride just thinking dropping the back 2"? I live in Minnesota so don't want to get too aggressive but get a better look. Any suggestions on which leveling kit to get?

And if i were to upgrade sway bar & steering stabalizer any suggestions on that?

Thanks really appreciate all the help!

 

[TooMuchTxn]

I went with the Hellwig 7685 front sway and Hellwig 7740 rear bar and McGaughy's 2" rear drop w autoride for my 2016 Chevrolet Tahoe LTZ.

The sways made a HECK of a lot of difference. The weight of the bars compared to the stock was staggering. The Tahoe feels more like my 2012 Range Rover Sport Supercharged and is just PLANTED to the ground. I was very surprised that the ride quality was not impacted as much as I would have expected.

The rear drop was perfect to level it with the front and give it a much nicer stance.

The one thing i did after the fact was add grease zerks. I was just going to drill and tap the hellwig bushings for grease zerks but found a set of Hotchkis bushings and brackets with the zerks already in on ebay for 20$ so snatched those up. For the rear end-links i just drilled and tapped the Hellwig ones for zerks.

I also added Moog front stabilizer bar links (K700538) to replace the stock ones but i didnt lower the front any.

Hellwig also stated that Hellwig 7799 spacer kit was required since I have a 6 speed auto but to my surprise it was NOT required for the 2016 Chevrolet Tahoe LTZ. I had a TON of room without using the spacers so I left them off.

 

[TooMuchTxn]

Ps those wheels look crazy nice. Makes me think about bumping up from 22's!

 

[16blkltz]

I went with the Hellwig 7685 front sway and Hellwig 7740 rear bar and McGaughy's 2" rear drop w autoride for my 2016 Chevrolet Tahoe LTZ.

The sways made a HECK of a lot of difference. The weight of the bars compared to the stock was staggering. The Tahoe feels more like my 2012 Range Rover Sport Supercharged and is just PLANTED to the ground. I was very surprised that the ride quality was not impacted as much as I would have expected.

The rear drop was perfect to level it with the front and give it a much nicer stance.

The one thing i did after the fact was add grease zerks. I was just going to drill and tap the hellwig bushings for grease zerks but found a set of Hotchkis bushings and brackets with the zerks already in on ebay for 20$ so snatched those up. For the rear end-links i just drilled and tapped the Hellwig ones for zerks.

I also added Moog front stabilizer bar links (K700538) to replace the stock ones but i didnt lower the front any.

Hellwig also stated that Hellwig 7799 spacer kit was required since I have a 6 speed auto but to my surprise it was NOT required for the 2016 Chevrolet Tahoe LTZ. I had a TON of room without using the spacers so I left them off.

We have the same year, model and trim. Why did you add Moog front stabilizer bar links? And is that Hellwig 7799 spacer kit for the front sway-bar installation? I'm thinking about replacing my stock front sway-bar.

I have the Hellwig 7740 rear sway-bar and love it.

 

[Matt Fox]

Thanks TooMuchTxn! Will more than likely get that on order ASAP! Hate having to slowdown around them corners if you don't have to!

 

[TooMuchTxn]

We have the same year, model and trim. Why did you add Moog front stabilizer bar links? And is that Hellwig 7799 spacer kit for the front sway-bar installation? I'm thinking about replacing my stock front sway-bar.

I have the Hellwig 7740 rear sway-bar and love it.

Honestly i didn't need to replace with Moog and read positive and negative reviews. They were just aluminum body and seemed nicer but wont improve performance any. They were like 6$.

The 7799 was required for the 6l80e but i dont remember if it specified between being needed for 2wd or 4wd. All it is is a spacer/shim that moves the bushing 1/4" down (so the whole bar would theoretically have more clearance uner the transmission). But again on my 2wd 6l80e i had plenty of room. And if you have a chop saw and a drill press (or even just a hand drill) you could make the shims for way cheaper.

 

[noob]

I'm not familiar with bump steer, but typically vibrations in the steering wheel come for improperly balanced wheels/tires. Some brands so built so poorly, that no matter what amount of weights are used, they are never 100%, and will vibrate at higher speeds.

As far as tracking the road, I noticed when I went to 24 inch wheels with 305/35/24 inch tires, the car would "follow" any imperfection in the road fairly easily. Same thing happened when I changed the wheels on the Escalade, G35 and rode a GTR with 22's.

 

[sickk23]

Never even heard of “bump steer” but the vibration is a balancing issue in one of your front wheels. If they can’t get it balanced then one (or both) wheels are junk. I’d take care of it fairly quickly because the manufacturer will exchange it, or they should. That’s been my experience anyways with a few different brands. I’m not sure of DUB’s rep/quality.

I don’t understand how replacing the stabilizer bars can make a “big difference”. Possibly just me, but it seems a lot like the placebo affect going on. Change a part out, and you’re feeling what you want to feel when you test it.

 

[TooMuchTxn]

Never even heard of “bump steer” but the vibration is a balancing issue in one of your front wheels. If they can’t get it balanced then one (or both) wheels are junk. I’d take care of it fairly quickly because the manufacturer will exchange it, or they should. That’s been my experience anyways with a few different brands. I’m not sure of DUB’s rep/quality.

I don’t understand how replacing the stabilizer bars can make a “big difference”. Possibly just me, but it seems a lot like the placebo affect going on. Change a part out, and you’re feeling what you want to feel when you test it.

i didn't meant to imply that stabilizers would fix bump steer i was just answering the question about brand. Stabilizers don't affect suspension travel. Stiffer/less body roll equates to a more planted vehicle able to maintain a flatter profile around turns/corners.

 

[noob]

I don’t have experience with the Yukon’s but my esky corners amazingly well compared to my previous generation without any suspension mods.