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Fifth Wheel Trailer Hitch Installation - 2012 Dodge Ram Pickup

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How to Install a Fifth Wheel Trailer Hitch on a 2012 Dodge Ram Pickup


All right today, on this 2012, Dodge Ram, we're going to install part number Rp50140-58. While we're underneath the vehicle we'll go ahead and start off by detaching the wire harness on the inside driver's side frame rail. This is going to give us room to install a frame bracket later on. We'll have to remove the heat shield for the spare tire too. On the passengers side next to the exhaust, we'll go ahead and remove the rubber hanger to give us some clear, so we can install the bracket. There two clips on the end of two, of the three pens holding the exhaust in place.

We'll go ahead and remove those, spray down the rubber hanger here, so we can slide it off. Next we'll go ahead and start working with our rear rail that goes in the bed of the truck. We're going to measure from the edge of the bed, forward as described in the instructions.We'll go ahead and make two marks in the bed and then line up the rail with it. Then we'll make sure its centered from left to right. Next we'll go ahead and mark and drill our holes in the bed.

The one by the holes as described in the directions. We'll go ahead and use a -inch drill bit to make a mark. Okay, then we'll follow up with a small 1/8th-inch drill bit for a high uphold. Okay, once their drilled, we'll go ahead and temporarily position the rear frame brackets, on the inside edge of the frame. I want to make sure that the holes and brackets, line up with our pile holes in the bed. Once we're satisfied they're in the right place we can go ahead and enlarge the holes.

Now we're going to enlarge the holes eventually to 9/16ths on the holes closest to the edge of the bed. On the other side of the rail, they'll be drilled out to a bigger size. Next we'll go ahead and install the rear brackets onto the frame in the truck. We'll have to take the U-bolt, slip it into place, and install the conical tooth washer and nut. Now go ahead and work with the holes going towards the front of the truck on the other side of the rail.

On top, we're going to enlarge with 1/8th-inch holes to 1-1/8th inches. After we make this cut, you'll notice this is directly above the hat channel. We'll use our hole saw as a guide to find the center at the bottom, and then we're going to go ahead and drill that out as well to 9/16ths.Now we'll take our tube-spacers, and we'll drop them in the hat channel. Then we can go ahead and move our rail back into place and install the hardware from the top. So with the holes going toward the back of the truck, we'll get the 2-inch long carriage bolts. Then we'll go back underneath the truck, and above the frame brackets and between the bed, we'll get another block. Its the block with the notch in it. That will go between the frame bracket and the bed of the truck. Below that we'll get another block, we have a round hole that is all set, and then a conical tooth washer and a nut. Now for our holes going towards the front, that will get the 4-inch long carriage bolt going all the way through the tube- spacer and out the bottom. Below that we'll get the conical tooth washer, a lock washer, and then a nut. Then lastly, our bolt that goes in the center, we'll install a spacer to go between the rail and the corrugation, our 2-inch carriage bolt, another flat block with the hole all set in the middle, and a lock washer and a nut. Now with all our hardware loosely installed, we'll leave it just like that. Now we'll go ahead and take our hitch, put it in the bed of the truck and use that to place our second rail. We'll go ahead and put it into place, once youre satisfied with the location, once again we'll go ahead and mark and drill the appropriate holes in the bed of the truck. Once we have them marked, we'll go ahead and move the rail away one more time. We'll go ahead and drill the five holes in the bed, and then install our hardware. Now the brackets for the front rail will sit on the outside of the truck. Go ahead and put the frame brackets into place and then we'll install our hardware. The holes that are closest to the back of the truck will get the 4-inch carriage bolts.You'll notice that it will go all the way through the outside of the hat channel. We'll also need to install a block between the had channel and the bed to keep it from crushing. Now this will be a tight fit, so we'll have to pry it out a little bit so we can install the block. That way we can ensure metal to metal contact. Then below the block we'll get our spacer-tube, and then our spacer-tube will go directly down to our frame bracket. Then underneath that we'll get a conical tooth washer and a nut. We'll do that on both sides of the rail, and then we'll do the hardware towards the front. Then I'll get the shorter 2-inch carriage bolt, blocks as needed to take up the space. In this case, it will be on top of the bed but below the rail. Then another large block with the hole offset underneath with a conical tooth washer and nut.We'll also install our last bolt that goes in the center. Then we'll go ahead and move onto our hardware that attaches the frame brackets to the frame. Again that'll be another U-bolt on the passengers side, it'll be pretty easy. We'll go ahead and slip it into place and install the conical tooth washer and nut. The driver's side is going to be a little bit more complicated. We'll have to take the U-bolt and stick it behind some electrical wiring, and also some break lines. We'll go ahead and slip it into place and work with the lines as needed to get it in there. Just make sure none of the lines are crushed. Then once again we'll install our conical tooth washer and nut. Now at this point we can go ahead and start tightening down all our hardware. First of all, we're going to tighten down our hardware that goes in the bedrail, to the frame brackets and the bed. We'll tighten it up, hand tight. After that we'll go ahead and torque down those bolts as described in the instructions. Then we can go ahead and continue on and tighten down the frame bracket hardware to the frame. We can tighten them down and then torque them down as specified in the instructions. Once all the bolts are torqued down, that will finish it for the installation of a hitch. Then we can go ahead and reinstall our exhaust, the heat shield for the spare tire. Okay with that, that will finish it for our install, part number RP50140-58, on our 2012 Dodge Ram Pickup. .


Info for this part was:

Employee Zack K
Video Edited:
Zack K
Employee Joshua S
Video Edited:
Joshua S
Employee Rick A
Test Fit:
Rick A

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