Math: Axle shift per inch of lift
07-19-2016, 01:09 PM
#11
JK Jedi Master
The easy way to see what the shift will be for a particular JK is get a stick the length of the track bar, hold one end on the top bolt, and swing the bottom end downward, watching how much the end moves toward the center of the vehicle.
07-19-2016, 01:11 PM
#12
JK Junkie
As the axle drops, the distance between the track bar body mounting point and where it meets the axle at a right angle (B) changes, as does the distance between the axle side mount of the track bar and the imaginary vertical line from the track bar body mount (A).
Last edited by 14Sport; 07-19-2016 at 01:14 PM.
07-19-2016, 01:15 PM
#15
JK Jedi
So you are assigning C as the track bar, B as the distance between the track bar body mount and the axle, and A as the distance from the track bar axle mount to an imaginary vertical line drawn from the track bar body mount to the axle. This line has to include a 90 degree angle for the theorem to apply.
As the axle drops, the distance between the track bar body mounting point and where it meets the axle at a right angle (B) changes, as does the distance between the axle side mount of the track bar and the imaginary line from the track bar body mount (A).
As the axle drops, the distance between the track bar body mounting point and where it meets the axle at a right angle (B) changes, as does the distance between the axle side mount of the track bar and the imaginary line from the track bar body mount (A).
07-19-2016, 01:16 PM
#16
JK Junkie
07-19-2016, 01:35 PM
#17
JK Jedi Master
What I was getting at was, it can't be said an inch of lift will result in a standard shift that can be said for all JKs, which is what I think the original post was searching for. In fact, the variable nature of the shift value is pointed out in the first post.
07-19-2016, 03:12 PM
#18
JK Jedi
OK. I see what you are saying about the formula. One would have to go out to the Jeep and take some measurements.
What I was getting at was, it can't be said an inch of lift will result in a standard shift that can be said for all JKs, which is what I think the original post was searching for. In fact, the variable nature of the shift value is pointed out in the first post.
What I was getting at was, it can't be said an inch of lift will result in a standard shift that can be said for all JKs, which is what I think the original post was searching for. In fact, the variable nature of the shift value is pointed out in the first post.
07-19-2016, 08:08 PM
#19
JK Super Freak
There's some interesting math here, that I wish I was more adept at constructing.
If the original equation, from the drawing is:
a² + b² = c²
The equation once the Jeep is lifted is:
(a-S)² + (b+L)² = c²
Where L is the amount of lift and S is the amount the axle will shift.
I sat and tried to put my high school trigonometry to work and didn't come up with something even close. The biggest problem is that the equation is not linear. I wish I was better at this. There still would not be any definitive answer, but a formula could be built in which you could plug some number in and get your axle shift.
If the original equation, from the drawing is:
a² + b² = c²
The equation once the Jeep is lifted is:
(a-S)² + (b+L)² = c²
Where L is the amount of lift and S is the amount the axle will shift.
I sat and tried to put my high school trigonometry to work and didn't come up with something even close. The biggest problem is that the equation is not linear. I wish I was better at this. There still would not be any definitive answer, but a formula could be built in which you could plug some number in and get your axle shift.
07-19-2016, 08:23 PM
#20
JK Jedi Master
There's some interesting math here, that I wish I was more adept at constructing.
If the original equation, from the drawing is:
a² + b² = c²
The equation once the Jeep is lifted is:
(a-S)² + (b+L)² = c²
Where L is the amount of lift and S is the amount the axle will shift.
I sat and tried to put my high school trigonometry to work and didn't come up with something even close. The biggest problem is that the equation is not linear. I wish I was better at this. There still would not be any definitive answer, but a formula could be built in which you could plug some number in and get your axle shift.
If the original equation, from the drawing is:
a² + b² = c²
The equation once the Jeep is lifted is:
(a-S)² + (b+L)² = c²
Where L is the amount of lift and S is the amount the axle will shift.
I sat and tried to put my high school trigonometry to work and didn't come up with something even close. The biggest problem is that the equation is not linear. I wish I was better at this. There still would not be any definitive answer, but a formula could be built in which you could plug some number in and get your axle shift.