Help me calculate the 3link/4link suspension in the calculator for my WJ!

[John_Miller]

Hello everyone! I’m sure this has all been discussed a thousand times already, but I’ve already read a bunch of information and watched a bunch of different videos on 3link/4link calculations. My head is about to explode. Theory is good, of course, but you need the opinion of those who have encountered this in practice. It’s hard to understand what antisquat 50% and 100% are; the sensations cannot be conveyed in text. Someone says that from 50 to 120 you can’t even feel the difference, someone says that anti-squat 80 is already a lot. I haven’t driven any jeep with 3link/4link, so I can’t rely on any values at all. It's just a brain explosion. Therefore, I turn to you for help.

Source data: Jeep grand cherokee wj 4.0. Axles patrol. Wheels 40 inches. The purpose of use is comfortable driving on highways, dirt roads, off-road in the forest, I don’t plan to crawl over rocks. Top speed 60 mph. Attached my calculations in the 4link calculator. What can you say based on the final values? What should you pay attention to? Suddenly I missed some important details. Just don't throw stones, I'm new to this.

I am attaching calculations for 4wd and 2wd

 

[John_Miller]

2 wd

 

[06h3]

Help is if you’re stranded not in need of a link calculator question answered.

Mods, can you remove the help prefix? Austin

 

[06h3]

Looks good, nothing glaringly bad from what I can tell

 

[John_Miller]

Help is if you’re stranded not in need of a link calculator question answered.

Mods, can you remove the help prefix? Austin

I apologize for the HELP prefix, I can’t remove it.

 

[Treefrog]

Values look good. Front pinion angle change during travel is on the high side for a highway vehicle. Plan to run an anti roll bar.

If you are after comfort, going to 50/50 travel will make a big difference. Unless the forest roads require it, running 37s instead of 40s will make a big difference.

 

[John_Miller]

Values look good. Front pinion angle change during travel is on the high side for a highway vehicle. Plan to run an anti roll bar.

If you are after comfort, going to 50/50 travel will make a big difference. Unless the forest roads require it, running 37s instead of 40s will make a big difference.

Thanks for answers. For me, the main thing is that there are no values that could greatly affect the steering.

The location and length of the rear links have changed slightly. Hence 2 questions: 1) can I move the upper links on the axle forward as in the screenshot? (marked with an arrow) 2) the roll axis of the rear axle has become at a large angle, although the overall roll axis of the car does not seem to be very large. Is this critical?

 

[Treefrog]

Thanks for answers. For me, the main thing is that there are no values that could greatly affect the steering.

The location and length of the rear links have changed slightly. Hence 2 questions: 1) can I move the upper links on the axle forward as in the screenshot? (marked with an arrow) 2) the roll axis of the rear axle has become at a large angle, although the overall roll axis of the car does not seem to be very large. Is this critical?

1. No reason you can't.
2. Depends on how large and what the vehicle is meant to do

 

[John_Miller]

I repeat, this is not a car for every day. It will mainly be used for forest off-road use. But to get to the forest you will have to take the highway.
Let's say I can drive 60 miles on the highway?

1. No reason you can't.
2. Depends on how large and what the vehicle is meant to do

 

[Treefrog]

There's 60 mile son the highway and then there's 60 miles on the highway with the wife and kids. 4 degrees is not all that steep. The front is getting a bit steep. The overall be oversteer may require more attentive driving.