roundss said:
SavageSun Willys said:
off-camber situations that could create issues like landing on your lid.
Landing on lid.................... bad.
Are there any newer, passenger side diff (for the front), spring under?
I've tried to think of how to classify the 4 wheeling I would do. I'll be hitting some nasty forest roads, some deep ruts (from washouts), with some off camber. Not planning on anything like the Rubicon, or slick rock..............but I'd like to be able to get out of a sticky situation.
When I built my rock crawler the vogue was 6,8 and even 10 in lifts. I did a 3 in lift. That fad of big lifts did not last real long. Going over a curb could literally lay your rig over on its side.
In the top center of my windshield is a angle meter. It only goes to 45 degrees and I can and have pegged it many times. On one of the trails in Moab there is an obstacle called 'tip-over challenge'. I can do any section of it and few folks will even attempt it.
So the question really becomes how stability do you want...a SIMPLE question, yes? The answer is so complex that one could write a book on it and the last line would still be, 'well it depends'.
The higher you lift your rig the better to get over obstacles, yes? Well, not really. Your axle provides x amount of clearance and going 4, 6, 8 even 10 in beyond that often serves no purpose. 1) Thus my approach is get the axle off the ground first. Do this via tire size. Go from a 33 in tall tire to a 35 in tire and you gain 1 in in axle height/clearance.
Tire size is generally limited by the body. Install raised body pucks to get the body higher. I run an extra 2 in. You might also need to do some body trimming.
At this point in our rig we now have 3 in of gained height. Of that 3 in only 1 in has affected the overall CoG by about 90%. The body lift impacts CoG by about 25%.
2) Lets now reduce some of the impact on CoG. Rule of thumb. For every inch you lift your suspension you need to extend your wheel track by 1 1/2 in outward per side. You can put on wider axle sets, wheel spacers or even different backspacing in your chosen wheels. Generally you can pick up an inch on either side using wheels or wheel spacers.
3) Add spring shackles or more curved springs such as HD or those from trucks. Say 2 in worth.
Bottom line: 1 in added at the axle, 2 in at the body, 2 in at the frame = 5 in in total lift, wider track by 1 + 1 in for more stability: Result, 5 in, wider track and you are still stable and have more clearance.
BONUS: Many rigs have 'stuff' hanging down underneath. Typically this is the transfer case. Note this under any Jeep TJ that has not been altered. By adding a flatter 'belly skid' you can gain an extra 2 inches or more by tucking the transfer case up into the tunnel. We rock crawler do this on our TJs by adding a 1 in motor mount lift which brings the entire drive line up further into the tunnel. I call it free lift as it gives you an added 2 in of under-body clearance.