Do you have a Sunline Truck Camper or a Solaris Motorhome? If it is a truck camper, the shocks are part of the truck that hauls it, therefore it's a problem with the truck, not the Sunline
On the other hand, if you have a Solaris, I can't really help you here. You may want to move the topic over to the Solaris specific forum. I have not looked at a Solaris in detail (I haven't seen that many of them), so all I know is what's listed in the Solaris brochures on the Files page of this site. BTW, the Solaris MH was built from 1978-1983.
2007 T-286SR Cherry/Granola, #6236, original owner, current mileage: 9467.8 (as of 5/26/19)
1997 T-2653 Blue Denim, #5471
1979 12 1/2' MC, Beige & Avocado, #4639
Past Sunlines: '97 T-2653 #5089, '94 T-2251, '86 T-1550, '94 T-2363, '98 T-270SR