MikeJ06 wrote:
Tokyojoe wrote:
Yes, the rear has to be adjusted for the extra lift height and causing the rear arms to move the tire closer to the front of the well/flares.
This is going to seem like an odd question, but could you or anyone else explain the whole rear suspension angle to me? What I mean is, when either side of the rear travels, does it get pulled closer to the front of the wheel well under normal conditions? I asked a friend of mine and his response was that I was thinking of the rear arm as being a single pivot point on the axle and not as an entire structure with multiple points. But if there are multiple pivot points at the rear ( I guess it is a U joint?), then at what point in suspension travel does the entire rear get pulled forward? Also, does the opposite side become effected when one side is pulled forward and if so how?
Well MikeJ, because you asked, I will try to paint a word picture.
First: there is an “arm” from the frame (in front of the axel) to the bottom of the axel (one on each side). If this arm was swung completely straight down the axel would be under the passenger seat, way “forward” of its correct position. Of course the axel will not swing down that much because the shocks extend only so far, but you see that the axel moves forward as it swings down. So when a truck is lifted (axel swung down a few inches) the at-rest position is forward of the at-rest of a non-lifted truck. And yes the axel moves forward in normal conditions -- a lifted Liberty operates more forward because the arm has swung down to its “lifted” position.
Second: there is also an “Arm” on the top of the axel that together with the Arms under the axel keep the axel from rotating with the wheels. This top “arm” is a yoke or V that comes together at the top of the differential. As the axel moves up and down, the input shaft stays somewhat level and the drive shaft universal joints bend to keep things turning. The upper and lower arms are not the same length so the axel tilts a bit also.
Third: On a lifted Liberty, the angel that the drive shaft meets the differential is always a little extreme -- so the 4” lift added the spacer to move the top arm back up, more to its normal position, this swing up moves that point backward, tilting the differential input shaft back up, lessoning the angel with the drive shaft.
Opposite side effected -- well a bit if one side moves down and forward the axel tilts and the wheels stay true to the axel so the higher wheel is tilted out at the bottom and turned out at its front ever so slightly -- not so mush to effect its alignment. But will not move forward unless its arm swings down.
Now you are likely very confused!
_________________
Ed
2006 4X4
Full Jeep skids
Rock Lizard Super Sliders
OME Spring Lift
Al's A-Arms and Quick Disconnects
Cobra 75 WXST and Fire Stick
Garmin 580 GPS
LOST #EH075243
http://www.cardomain.com/ride/2934108