lowering rear of 3500 4x4
Yes, as mentioned above, there is a kit to lower the truck. However woe onto you if you are at all past either the time or mileage limits (time limit in my case) - then the 'stealer' will charge for the parts to the tune of $700 or more.
I ended up going to a local suspension shop and for about $100 they installed shorter blocks between axle & spring. (replace 4" with 2") This doesn't affect how the overloads work at all. What complicated my situation is I have a Coverit enclosure in which I store my 34' Travel Supreme and truck when not being used. I simply don't have the clearance to spare to flip the axles on the trailer - as it is now I have to play games tying back the fabric on the Coverit to get the height clearance I need at the door area. Once inside all is well, but the door area is really tight.
There is only one down side of the method I used so far - I notice when pulling hard there is a bit of driveshaft-type viabration. It doesn't do it under normal conditions, only when pulling the 5th wheel up hill at near 30 lbs boost. I am wondering if anyone else has experienced this. Maybe the factory kit changes the differential angle a bit which only replacing the blocks does not do?