The Electric 5th Wheel Landing Gear Set - 36" Travel # RP500708 will work on your 2006 Forest River Cardinal and will not require a separate battery. These upgraded landing gear have the same mounting locations as most systems, so you should be able to reuse your old C-brackets. I've attached a video as well as the installation details to assist. You will just want to note the brackets are 17-1/2 inches apart to fit the weld stops. view full answer...
The only coupler we have that is a fit for your 1-7/8 inch ball and 2-1/2 inch channel is the Channel Tongue Trailer Coupler # CT-2002-Z. The bolt holes on this are 2-1/4 inches on center instead of 2-1/2 inches. view full answer...