40s, how to fit??

[muddy12]

I respectfully disagree....Now keep in mind, my "back in the day" was the NP205 transfer case and dana 44 solid axles. We put 40's on them all the time, coupled with 4.11 gears, drop-down transfer case supports (for proper drive shaft alignment), longer drive shafts, etc. We abused the hell out of them in the mud. They held up just fine. 3/4 tons (as we called them then) were for 42's and 44's.

Just my perspective. I'm not familiar with the independent axle assemblies, or the strength of them. That being said, your comment of "oof' might be right on the mark nowadays.

My back in the day was a new 2000 ram 1500 I bought when I got out of high school. Still had solid axle, but man you could snap an axleshaft with a set of 35’s on command. The new IFS stuff I know nothing about.... but something tells me its not any stronger.

Big difference between the “old school” solid axles, and anything made after about the early 90’s.
The older axles still used a spindle with inner and outer wheel bearings. The newer axles (as well as the IFS) use a unitized bearing assembly.
The uni-bearing design is much more “assembly line friendly”, but is not as robust as the older spindle/bearing design.


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[olyelr]

Big difference between the “old school” solid axles, and anything made after about the early 90’s.
The older axles still used a spindle with inner and outer wheel bearings. The newer axles (as well as the IFS) use a unitized bearing assembly.
The uni-bearing design is much more “assembly line friendly”, but is not as robust as the older spindle/bearing design.


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Oh trust me, Im aware of the modern hub bearings.... changed one too many of them in my time.

 

[DodgeDude99]

Friends don't let friends install body lifts.

Friends don’t let friend install tires 37” or bigger on an IFS truck. Fixed it for you.
If you want to run big tires, get something with a solid axle, which doesn’t have suspension components made out of aluminum.
I cringe whenever I see an IFS truck with big tires. You think your cool, I see you as a danger to me and everyone else on the road.

 

[chippy Dee]

Howdy, I’ve scoured this thread and others but can’t seem to find this particular answer. Currently my 2017 1500 has a 6” Rough Country suspension lift and I’m running 35x12.5r20s on the stock rims. I know I can fit 37s as is but when I get new shoes I wanted to jump to 40s. Anyone know what size body lift I would need in conjunction with my current suspension lift in order to fit 40x13.5s? Brand recommendation?

Thanks in advance!

I have 13.5" of lift on my 1500 with 24x14 and 40s and I have full u turn

 

[Dean2]

I know this is a neckro thread being resurrected by a newbie, but at least he used the search function.

A modern 1500 with a big lift, and 40" tires is for going to the burger shack and posing on main street. If you are going for the looks, fill your boots. If you seriously expect to off road that thing, I am sure glad I am not the one paying the repair bills.

Also, don't mean to hurt your feelings of the original OP fro,m 2019, but Rough Country does not make quality lifts. They are poorly designed, not well engineered and made too light. Even for street use, take it to a specialist and make sure the angles, drops etc are right BEFORE pushing it up even more.

 

[TD84]

I have 13.5" of lift on my 1500 with 24x14 and 40s and I have full u turn

How did you get 13.5 inches of lift? I was able to get 12 and I wouldn't want to push it anymore.

 

[DILLIGAF]

Friends don’t let friend install tires 37” or bigger on an IFS truck. Fixed it for you.

Thats what broke people say And usually they dont even have a 2 post lift at home either So their opinion on the matter is laughable.