For trailers that have either a leaf spring suspension or a
torsion axle suspension, Monroe manufactures the Retrofit Kit.
Adding Monroe RV shocks reduces the bounce and wander of
your trailer for improved towing capacity. Monroe RV shocks
also reduce the surge caused by trailer motion feedback to the
tow vehicle, for a smoother, more comfortable ride.
Recommended for use with Monroe RV shock absorbers for a
softer, more controlled ride.
Easily installed without welding or special tools, this do-it-yourself kit
enables modification of your trailer suspension to accomodate
Monroe RV shock absorbers.
Kit Selection: For installation of a retrofit on your light
duty trailer, you need to determine what type of frame and suspension
you have on your specific trailer. The frame types shown will
reflect mounting the shock on the inboard side. If ample clearance
(about 4 inches) exists between the frame and the tire, outboard
installation is acceptable.
Note that one kit is required for each axle, therefore tandem
axle requires two kits.
- Determine the frame type:
- Determine the diameter of your axle (leaf springs.) Determine
specific GVW rating of your trailer suspension (torsion axle)
- Based on the axle diameter/GVW rating from step 2, locate
the correct retrofit kit from the corresponding chart below
- Determine the location of the upper mounting. Measure the
distance between the upper and lower mountings. Based on the
centerline dimension at the vehicle static height. Dimension
should be taken with trailer on level surface.
- Using the measurement from step 4, select the appropriate
Magnum RV shock absorber from the third chart below.
- You can download the instructions for the Monroe kits. They
are in the standard Adobe PDF format. CLICK HERE for page 1
(860KB). CLICK HERE for page 2 (760KB).
Due to the variances of different modifications to a vehicle or trailer,
it is your responsability
to measure that the shocks and kits you purchase are dimensionally correct.