Raising Trailer Height Using an Over-Under Conversion Kit

Question:

hi, thanks for the support, my question is, the back end of the trailer is drooping on my trailer, a 24 footer, i bought new spring shackles so i could weld 4 inch lift tubing but if i can explore other options i am happy to do that..so if i was to purchase this kit, how much lift are we talking about and are there blocks that can be added? is there a possibility the axle can break off and roll away? i do have sway control bars and hitch , i definitly want to give it a lift what do you think? what is the process for installing a kit like this if it will work:?

asked by: John

Expert Reply:

First you are going to want to determine why the trailer is sagging at the back. Replace in worn suspension parts because you do not want to make any changes until the suspension is in good working order.

An over-under conversion kit like # K71-385-00 would be the best way to go. This kit fits 3 inch round axles. We also have # K71-384-00 that fits 2-3/8 inch diameter round axles. The new spring seats are positioned on the top of the axle and the springs will then sit on top. The height difference is roughly equivalent to the axle diameter.

When lifting your trailer you need to keep in mind that the geometry of the trailer will change. You may encounter lower or heavier tongue weight, and/or the trailer may become top heavy, contributing to trailer sway and instability, especially when passing large trucks or in high winds.

I do not advise using blocks to add lift because it will only increase the instability of the trailer. If you are wanting to raise the trailer because the towing vehicle is too high, the best and cheapest solution is to use a ball mount or weight distribution shank with more drop.

expert reply by: Michael H