Jeep build stages - for example: Wrangler

jeep build stages, just for information and brought from Quadratec

after lift

lift calculation

here is the instruction from FSM,

Checking Front Ride Height

Measure front ride height with the vehicle unloaded (no luggage or passengers) and with the fuel tank full.

Place the vehicle on a level surface and measure the veryical distance between the top of the axle tube (A) and the underside of the frame sill (B). Refer to Figure 1 for driver's side measurement and Figure 2 for passenger side measurement. Be sure each measurement is taken from the top of the tube and not from the axle or shift motor housings.

With Standard or Soft Ride Suspension, vertical distance should be 17 cm (6-3/4 inches) plus or minus 13 mm (1/2 inch). With Heavy Duty Suspension, vertical distance should be 20 cm (7-3/4 inches) plus or minus 13 mm (1/2 inch).

Checking Rear Ride Height

Measure rear ride height with the vehicle unloaded (no luggage or passengers) and with the fuel tank full.

Place the vehicle on a level surface and measure the vertical distance between the top of the axle tube (C) and the underside of the frame sill (D) inboard of the jounce bumper (E).

With Standard or Soft Ride Suspension, vertical distance should be 15 cm (6 inches) plus or minus 13 mm (1/2 inch). With Heavy Duty Suspension, vertical distance should be 18 cm (7 inches) plus or minus 13 mm (1/2 inch).

I measured mine and result is:

front spring

front springs replaced with  MB W124's springs. Diameter was bit smaller, but it corrected with acetylene torch and sledge hammer

 

1" spacer added on top of springs.

track bar moved 2cm driver side and steering wheel adjusted.

 

now differential clearance and ride height: 

with 31x10.5R15, 

ride height measured from top point of axle tube to bottom point of frame, differential clearance measured from ground to bottom point of differential case.