Yes, on my 2013 E450 Jayco.. I wouldn't say they helped with alignment but the sway on a bad road has been worlds better. Also, don't get the rocking back and forth in/out of driveways anymore...
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what is the chassis,.... I will say this, with the front... there is a multitude of spring # ratings and first check there... I've had poor results with putting sumos on the front because of the twin Ibeam suspension... there's just not much travel and the sumo's make it to harsh of a ride.... next, as said,..you need to have a min. of 5 Degrees caster..another problem for most drivers with the un equal axel length is as you are driving you can feel the steering wheel move back and forth,.. when this happens they over correct and start sawing at the wheel...the way I teach to correct this is to let go of the wheel and see that it is actually is going straight and needs no correction,... most e series are over sprung in the front causing the rear, which is softer to sway around...that is why I weigh every coach, then adjust the spring to match...cab over models need more spring weight than the b class... but uploaders always get the heavyest springs available...and most are wrong.. when I install the Sumo's on the rear I put them behind the axel... stops the pogo that putting them infront causes and makes them a more softer progression.. adding a bigger rear sway is a big help... have some one video you driving and make sure you aren't sawing the wheel with out knowing
depending on the year, some f53's didn't have a front tracking (panard bar ) and were plagued with a multitude of suspension problems , a big one was the shocks,... ford decided that bilstien didn't know how to valve shocks correct, so they contracted with bilsien to make shocks with their valving speck,... that why you can take the factory bilsiens off, put after maket bielstien on and net a huge improvement....on f53's a lot of people do whats called the CHF,... and it's exact that,. a cheep handling fix. when what was needed was the proper sway bar to be installed...putting a bandaid on a broken bone makes you feel like you done something...
there's a lot of tuning that can be done with sumo's, I did R&D with jerry at sumo... and helpped with getting the kits tuned for a more over all package to be sent out...naturally a set up for a 26'r won't be the same as one for a 34'r... I have shied away from using sumos on the front for this reason... I off road with my rv,.. with the sumos it made it too harsh and stiff and took away wheel travel...beings the front isn't subject to a wide rage off weight change, I choose to just spring and shock to correct weight
