the weight and contact height of select axles with wheels 22 in multiple tandem axle type vehicles may be changed by changing the settings of load leveler valve 50 air diverter 52 and regulator 54 depending upon the need air will be diverted to lift air bag 44 which in turn actuates second end 32 of lever 28 causing lever 28 to rotate about the fulcrum 34 and in turn lift first end 30 first end 30 then exerts upward pressure on adjustable sling 38 lifting axle with wheel 22 which in turn lifts remote end with adapter 20 which is now able to deflate and compress first suspension air bag 24 by exhausting air to atmosphere through diverter valve 52 the result is an elevated wheel position relative to ground level 56 such that the tires on axles with wheels 22 that are part of lift axle suspensions 10 are conserved further should the need to adapt the lift axle suspension 10 to a different vehicle an operator may select one of adjustably positioned fulcrum points 40 and adjust the sling by operating sling adjustment mechanism 42 in order to allow for safe operation of a lift axle the prior art lift axle suspension 10 described above was designed to ensure that the safe operating load limit could not be exceeded when a trailer is being operated in the u201c lift u201d or u201c up u201d mode in the lift axle mode diverter 52 is set to supply air to lift bag 44 which causes corresponding air bag 24 to be compressed and axle 22 to be raised regulator 54 is set to prevent the pressure in line 48 d from exceeding.