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2” SST or Readylift 4” Big Lift

CoreyOringderff

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I recently bought my 21 trail boss and I’m wanting to add 35s and a lift to it. It seems like the 2” SST leveling kit is the go to lift kit when looking for reviews but I can’t find any reviews on the 4” kit. It seems like the 2” leveling kit can easily clear 35s with the correct offset. I’m hoping to fit 35x12.5 KO2s on an 18x9 rim with a -12 offset

I did notice that the 4” 44-39420 kit doesn’t come with upper control arms and notes say they require the stock ones.

Aside from these two kits are there any in similar price ranges I should consider?
 
Some go with the 1.75” Readylift front level. RL says you can still use Auto 4wd (they say not to on the 2” fyi), so if that is important to you that makes the 1.75” a contender. Not sure if or how much more difficult it would be to stuff 35s under it
 
Some go with the 1.75” Readylift front level. RL says you can still use Auto 4wd (they say not to on the 2” fyi), so if that is important to you that makes the 1.75” a contender. Not sure if or how much more difficult it would be to stuff 35s under it
Looking into that lift now and it looks like all I need. They still recommend not using the auto 4wd but readylift claims I can fit a 285/75R18 with stock rims with no rubbing or trimming. Should be 34.8 x 11.2. Now just need to determine what wheel spacers to use for the wider stance, I’m thinking 1.5” will be perfect as long as I don’t have to modify studs.
 
Looking into that lift now and it looks like all I need. They still recommend not using the auto 4wd but readylift claims I can fit a 285/75R18 with stock rims with no rubbing or trimming. Should be 34.8 x 11.2. Now just need to determine what wheel spacers to use for the wider stance, I’m thinking 1.5” will be perfect as long as I don’t have to modify studs.

I'm in the same boat. I'm looking at leveling the front and everyone is pointing to the RL 1.75" leveling kit. I think my rake is only 1.5" but RL said I can use just upper spacers to achieve 1.5" or both and get 1.75". I would love to maybe lift the rear by an inch or two and level the front but then it's $$$ and then you start messing with sensors, cameras, lights. I just want the truck to stand out a little, not where i need a ladder to get in. I'm starting to see more on the road.

So I figured just level the front and be done. But then seeing the not recommended auto 4WD makes me nervous.

I've got a '24 with stock 20 inch stick, stock suspension and I'm running 285/65/20. Basically 34.6" with no rubbing and no removal of anything.
 
I'm in the same boat. I'm looking at leveling the front and everyone is pointing to the RL 1.75" leveling kit. I think my rake is only 1.5" but RL said I can use just upper spacers to achieve 1.5" or both and get 1.75". I would love to maybe lift the rear by an inch or two and level the front but then it's $$$ and then you start messing with sensors, cameras, lights. I just want the truck to stand out a little, not where i need a ladder to get in. I'm starting to see more on the road.

So I figured just level the front and be done. But then seeing the not recommended auto 4WD makes me nervous.

I've got a '24 with stock 20 inch stick, stock suspension and I'm running 285/65/20. Basically 34.6" with no rubbing and no removal of anything.
From what I have gathered any lift or level near or above 2” from any company will cause problems with 4Auto, readylift is just trying to cover themselves by alerting the customer first.

I think I’m going to go with the 1.75” level and the 285/75R18s that they say will fit on the stock wheels with no rubbing. I think that should get me almost completely level. After measuring it seems the 2” SST lift/level will retain a 1” rake while the 1.75 will have about a .25” rake.

If I don’t like the stance I’ll put on some 1.50” spacers until I can get new wheels with a -12 offset.
 
From what I have gathered any lift or level near or above 2” from any company will cause problems with 4Auto, readylift is just trying to cover themselves by alerting the customer first.

I think I’m going to go with the 1.75” level and the 285/75R18s that they say will fit on the stock wheels with no rubbing. I think that should get me almost completely level. After measuring it seems the 2” SST lift/level will retain a 1” rake while the 1.75 will have about a .25” rake.

If I don’t like the stance I’ll put on some 1.50” spacers until I can get new wheels with a -12 offset.

Yeah, I'm guessing under 2" should be safe. Rough Country has a leveling kit that is 1.5" I think I like the RL since it gives the options with upper and lower spacers. I'll have to measure again but I think my rake is 1.5 so with that lift I should be perfectly leveled. I had a Tundra that was just about perfect but changed the shackles on the rear to give a slight rake, but went to big on the shackles and had a noticeable rake again!
 
1.75 Ready lift W/ upper arms. this is a 285/55/22 on a 10" wide -18mm wheel...

you will be very close with a 9 and a 12.5 wide tire...the -12 may be just what you need to clear after trimming, most go with a ZERO offset
 

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Can anybody lead me to how I can remove the plastic covers that are connected to the upper strut bolts? I’m assuming I can just pry them off and the cover should move out of the way, right?

I’m going to go with 285/75R18 on stock rims instead of the 35x12.5. According to readylift that will fit without spacers but I’m going to get some 1.5” Boras to push them out until I can get something with a -12 offset.

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From what I have gathered any lift or level near or above 2” from any company will cause problems with 4Auto, readylift is just trying to cover themselves by alerting the customer first.

I think I’m going to go with the 1.75” level and the 285/75R18s that they say will fit on the stock wheels with no rubbing. I think that should get me almost completely level. After measuring it seems the 2” SST lift/level will retain a 1” rake while the 1.75 will have about a .25” rake.

If I don’t like the stance I’ll put on some 1.50” spacers until I can get new wheels with a -12 offset.
why would a level kit give auto 4wd issues?
 
why would a level kit give auto 4wd issues?
I don’t know the specifics but from my understanding the increased torque from the system changing itself between 2hi and 4hi can cause vibration and damage. Readylift tells you with all of their kits that you can’t use 4 auto with their kits.
 
I had seen in some other threads or elsewhere when doing my research folks asking what the actual spacer stack up is for the 1.75” leveling kit. Here’s the actual measurements since readylift doesn’t supply the info. The actual spacer stack up is 1.265”.


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I had seen in some other threads or elsewhere when doing my research folks asking what the actual spacer stack up is for the 1.75” leveling kit. Here’s the actual measurements since readylift doesn’t supply the info. The actual spacer stack up is 1.265”.


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It’s not a 1:1 ratio. Geometry. RL told me that the top spacer equates to 1.25” and the bottom is .5” for a total of 1.75” lift.
 
RL is just covering their butts with the Auto 4wd warning. I have the RL 2in kit and have used Auto 4wd. Works fine.
I guess if you were going 70mph and hit some ice then went back to 100% traction, it could be a problem. But then again, maybe not? The very minimal “risk” was not a factor for me but everyone uses their trucks differently 👍
 
IMHO, the issue with the AWD auto, is the truck is already lifted from the factory incorrectly, (improper - too short and wrong angles) on the upper a-arms. That a leveling kit then exacerbates and already higher angled CV joint in the front driveshafts since the front diff is still in the stock location.
If you install a proper lift that drops the diff case, thats one way to fix it, or you can go for a hardcore prerunner style setup that changes upper and lower arms, and then uses different front CVs that can handle the angles.
 

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