Owners Pictures of 35" Tires on Stock AT4 or Trail Boss

Mark Vyskocil · August 17, 2019

No guts no glory. I went ahead and did the Rough Country 1318 2in level. It was anything but level. It had had the front up an inch higher than the rear. So out go the factory AT4 blocks and in come 3in ones. Sits dead level now. Went with 35x12.50x20 Nitto Trail Grapplers. Was a little nervous since they measure and true 35in and 13.39 wide. A 1/4 spacer was needed on the front since the width of tire was causing a light rub on the upper control arms. Removed the mud flap bracket, trimmed the mudflap, and pushed and pulled the liner out of the way. No rubs, lock to lock now.

brianc636 · August 17, 2019

No guts no glory. I went ahead and did the Rough Country 1318 2in level. It was anything but level. It had had the front up an inch higher than the rear. So out go the factory AT4 blocks and in come 3in ones. Sits dead level now. Went with 35x12.50x20 Nitto Trail Grapplers. Was a little nervous since they measure and true 35in and 13.39 wide. A 1/4 spacer was needed on the front since the width of tire was causing a light rub on the upper control arms. Removed the mud flap bracket, trimmed the mudflap, and pushed and pulled the liner out of the way. No rubs, lock to lock now.

Pics of the post surgery modification?

dctackett10 · August 18, 2019

17 hours ago, brianc636 said:

Pics of the post surgery modification?

Did you go with the borla wheel spacer?

Mark Vyskocil · August 18, 2019

She still has the bandages on, but once they come off and she has time heal a little maybe.

I didn't use a wheel spacer or adapter just a Dorman 6 lug "shim" I picked up at the local O'Reilly's. 1/4in thick, worked perfect.

DarrenC24 · August 19, 2019

On 8/17/2019 at 3:02 PM, Mark Vyskocil said:

No guts no glory. I went ahead and did the Rough Country 1318 2in level. It was anything but level. It had had the front up an inch higher than the rear. So out go the factory AT4 blocks and in come 3in ones. Sits dead level now. Went with 35x12.50x20 Nitto Trail Grapplers. Was a little nervous since they measure and true 35in and 13.39 wide. A 1/4 spacer was needed on the front since the width of tire was causing a light rub on the upper control arms. Removed the mud flap bracket, trimmed the mudflap, and pushed and pulled the liner out of the way. No rubs, lock to lock now.

Awesome looking truck!! Do you have any side pictures?

mattsvtcobra · August 19, 2019

How does everything look with the "Rough Country 1318 2in level" kit? I see that it's specific to the at4, but curious if it's the same as everyone else's level.

I started a chat with Kirk at RC, and he stated that the geometry stays perfect with this kit. Anyone?

Edited August 19, 2019 by mattsvtcobra

Mark Vyskocil · August 19, 2019

I'll try to get a few more side pics uploaded tonight.

The geometry was perfect. My alignment guy was shocked, a slight tweak to the toe and we were done. I think the idea with the 1318 is that the lift comes from more than one location. A spacer at the bottom of the spring and the shims between the lower control arm and the shock. Rather the just a big block at the bottom of the shock. When the say 2 in, they mean 2 in.

brianc636 · August 19, 2019

I'll try to get a few more side pics uploaded tonight.

The geometry was perfect. My alignment guy was shocked, a slight tweak to the toe and we were done. I think the idea with the 1318 is that the lift comes from more than one location. A spacer at the bottom of the spring and the shims between the lower control arm and the shock. Rather the just a big block at the bottom of the shock. When the say 2 in, they mean 2 in.

How was the CV and ball joint angles? I think this is the area of concern when going over 1.5” on the AT4/TB trucks.

Got any pictures of those?

Mark Vyskocil · August 20, 2019

I don't feel the angles are a concern at all. It drives just like it did stock but with a more stable or planted feel.

Mark Vyskocil · August 20, 2019

brianc636 · August 20, 2019

CV angle looks good, close to LCA/shock at all?

I like the look of the 2” system better than the 1.5” system for sure. I just didn’t want to run the risk of blowing the CV or ball joints out at full droop.

Cody OTR/L · August 20, 2019

1.5" Motofab

TB 18s on 35x12.50r18

2"

I think the last 2 are before the level and spacers spacers

Sent from my SM-G960U using Tapatalk

Mgmack · August 20, 2019

38 minutes ago, Cody OTR/L said:

1.5" Motofab

TB 18s on 35x12.50r18

2"

I think the last 2 are before the level and spacers spacers

Sent from my SM-G960U using Tapatalk

What size spacers did you use up front?

dctackett10 · August 21, 2019

16 hours ago, Cody OTR/L said:

1.5" Motofab

TB 18s on 35x12.50r18

2"

I think the last 2 are before the level and spacers spacers

Sent from my SM-G960U using Tapatalk

thsoccer3 · August 21, 2019

On 8/19/2019 at 7:28 PM, Mark Vyskocil said:

No big deal, but your installer installed the bolts upside down according to manufacturer's recommendation (instructions). I cannot tell in the photo, as your pre-load spacer looks identical to mine, but I wonder if the spacer was also installed upside down (with the chamfer facing up) which resulted in the extra, unwanted lift.

My RC 1318 kit leveled my truck perfectly, within 1/16". No biggie, angles still look good, and you got alignment. Congratulations on your extra lift haha.