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Reese Fifth Wheel Installation Kit for the 2012 2500 by Ram

Reese Fifth Wheel Installation Kit

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Code:   RP30074



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Under-Bed Rail and Installation Kit for Reese Elite Series 5th Wheel Trailer Hitches - 2012 2500 by Ram

Custom, under-bed rail kit provides uninhibited use of your truck bed once hitch is removed and features Reese's easy and secure Power Puck mounting system. Works with Elite Series and Signature Series fifth-wheel and gooseneck hitches.


  • Installation kit is designed for use with Reese Elite Series and Signature Series 5th-wheel and gooseneck trailer hitches
  • Under-bed rails provide complete access to truck bed when hitch is removed
    • No exposed rails
    • 4 Small mounting holes sit flush with truck bed
  • Power Puck system allows quick, simple mounting and removal of hitch
  • Wide platform ensures absolute hitch stability
  • Vehicle-specific design reduces installation time and requires less drilling than universal systems
    • Brackets mount on the outside of Ram 2500 frame rails
    • Crossmembers sit along top of Ram 2500 frame rails, beneath bed
  • Black powder coated steel resists corrosion
  • Rails and installation hardware included
  • Made in USA


  • Application: Reese Elite Series and Signature Series 5th-wheel and gooseneck trailer hitches
  • Capacity: 18,000 lbs
  • 7-Year limited warranty

30074 Reese Elite Series, Signature Series Underbed Rail Kit

Video of Under-Bed Rail and Installation Kit for Reese Elite Series 5th Wheel Trailer Hitches

Videos are provided as a guide only. Refer to manufacturer
installation instructions and specs for complete information.

Video fifth wheel install dodge ram 3500
Fifth Wheel Hitch Kit Installation - 2009 Dodge Ram 3500 Series Mega Cab

Video Transcript for Fifth Wheel Hitch Kit Installation - 2009 Dodge Ram 3500 Series Mega Cab

Today on this 2009 Dodge Ram 3500 Series Mega Cab we will be installing the signature series rail kit part number 30074. The first thing we want to do in preparation to installing our cross members under the bed is to remove our spare tire and get it out of the way so we have some more working room. The cross members we are going to be installing are going to be sitting in between the two hat channels right above the exhaust and over top of the gas tank as well. On standard models you can follow the directions to fit the cross members in from underneath the bed and just manipulate them into position. However on this mega cab model the spacing is not there for us to do that so what I am going to do is loosen up the bed and slide the cross members in from the outside of the frame directly across over the top. 00:48

There are four bolts per side that are holding the bed to the frame rail. We are going to remove the two rear most bolts and just simply loosen the two forward ones so that the bed does not shift on us. With the bed loosened up we can slide our cross members into place. I am going to run the bolts in and out of the weld nuts in the side before we go ahead and do that just to make sure that they are cleaned out to make it easier to get the bolts in place. What I have done is put a block of wood here over one of the hat channels that is going to help hold the bed up while I slide my cross members through. When sliding the cross members into place we want to make sure that we have the welded plate facing towards the bottom that is going to be making contact with the frame. Next we can loosely install our frame brackets to the cross members. We are going to be using the 5/ 8 by 1- 1/ 2 inch bolts along with a lock washer and flat washer. 01:40

At this time we need to determine if we are going to be using the clamp on application for our side brackets or if we are going to be using the drilled holes where it mounts directly to the frame. For this installation we are going to be using the clamps so we need to put our clamps into place. The forward clamp that we are going to be using has the square holes in it and you see we have got one at the top and two holes at the bottom. The 1500 series will be using the top hole. The 2500 and 3500 series will use the bottom hole. That is going to align from the inside of the frame with the holes here and the bracket. Attaching to those we are going to be using the long carriage bolts and tube spacers as well. We are going to go above and below the frame. For this forward bracket we are going to be using the zinc colored tube spacers. For the rear clamp we are going to be using this one here. That is going to be attaching to this hole and it is going to go diagonally and attach to these holes as well. We are going to be using the bottom set of holes for our application. For this one we are going to be using the same carriage bolts but we are going to be using the gold colored tube spacers. At this position we are going to need to put a spacer in. This is going to need to go in between the frame bracket and the frame itself. We are going to install those now. Make sure when installing the brackets and carriage bolts that we flush against the frame. Make sure we are not pinching the wiring harnesses or the brake lines. 03:11

At the top of the bracket you will notice that it has got round holes opposed to the square holes for the carriage bolt so at this location you are going to need to add a one by two inch block. We do not want to forget to put the spacer at this location in between the frame and the bracket. We want to attach those carriage bolts to the brackets using the conical tooth washer and hex nut. Then we just want to repeat that procedure for the passenger side as well. With both frame brackets on each side we can go ahead and start tightening the bolts down so we do want to make sure that the frame brackets are sitting square evenly on both sides. With the brackets tightened down we are next going to go ahead and use the pointed bolt that is provided with the installation kit and mark out our holes that are going to need to be drilled for our puck system. Before we do that we want to remove the spacers in between the bed and the frame and also put the bed bolts back in. To mark the holes in the bed take the pointed bolt and run it into the threads in the cross members here. When we tighten that down the pointed end will make it dimple inside the bed. Note that the upper driver side hole is right above the gas tank so we will not be able to get our pointed bolt in there. Once we get the other three marked out we will take some measurements and that will tell us where to drill the hole for that location. 04:48

Now that we have used the pointed bolt we can go back inside the bed here and find the dimples that we made. On this particular vehicle they are kind of hard to see because we do have a spray in bed liner but they are sitting on the inside of this corrugation. To make sure you are finding the correct one they will be 13 inches apart. We will find the one on the driver side as well and measure out 13 inches. With those located we want to remove the bolts that are holding the frame brackets to the cross members. Just slide the cross members out of the way a little bit so when we drill our holes through the bed we do not hit the cross members and the scar those up. With the holes cut we want to take our cross members and slide them back into position both into the frame brackets and hand tighten them. We will come back inside the bed here and install our pucks. The pucks are going to sit into the cross members. The bottom will fit right in the groove in the cross member. We want to make sure we put our trim ring over top of the puck before we it. Take our button headed screw along with the lock washer and that through the hole in the puck down and thread it into the cross member and tighten those down. Continue that for all four of them and come back through and start the torquing process. Start torquing with these pucks first. Go back under the bed to first torque the cross members to the frame brackets and finally torque the frame brackets to the frame. You may notice that when you go to torque the cross members to the frame brackets that you have some interference from the overhang on the bed itself. If that is the case you may need to cut out a section to give you enough clearance to get to the bolt heads to torque them down. You can possibly move the pucks and lift the bed back up out of your way. With all of the bolts torqued down our installation is completed. Make sure that if you removed any wiring harnesses from the frame rail that you tie those back up into place and if you removed any brake lines, the same thing there. Also make sure to put the spare tire back up into position. That will conclude the installation of the signature series rail kit part number 30074.

Customer Reviews

Under-Bed Rail and Installation Kit for Reese Elite Series 5th Wheel Trailer Hitches - RP30074

Average Customer Rating:  ratingratingratingratingrating4.3 out of 5 stars   (3 Customer Reviews)

- RP30074

ratingratingratingratingrating by: Rick Z.11/21/2011

Is this review helpful?

This is an excellent product, all parts were correct. The install was challenging but was accomplished in the freezing cold of my driveway and it was the first fifth wheel hitch I ever installed thanks to the etrailer videos and instructions from the manufacturer's website.27276

- RP30074

ratingratingratingratingrating by: John S05/16/2013

Is this review helpful?

This is the second truck using the Signature Series Fifth wheel hitch. Had a Ram 05 2500 SLT, now installing on Ram 2012 Big Horn 3500 (not dually). both beds are long box. First time on the 05 took less the 4 hrs. Pretty simple, directions were good. This time not so smooth. Don't have the MEGA Cab but after wasting too much time trying to insert the rails(which I did on the first truck), just decided to follow the MEGA option and raise the truck bed. Also needed to remove the fender well cover on Driver side to access the area. Once I did this went pretty smooth. One ground lug had to be relocated which fell right in the middle of the plate on driver's side. Exhaust is always in the way for what you are about to do. Good idea to run all bolts into rails to clean out threads before install, especially the pointed locator bolt supplied. Also removed the spare tire and heat shield. Just do it, you will be thankful for the extra space. 80580

- RP30074

ratingratingratingratingrating by: James03/01/2013

Is this review helpful?

this is the only way to go this is the third one I have installed, and alos etrailer has the best price.68342

Ask the Experts about this Reese Fifth Wheel Installation Kit
Expert Answers about Under-Bed Rail and Installation Kit for Reese Elite Series 5th Wheel Trailer Hitches - RP30074                                           Do you have a question about this Fifth Wheel Installation Kit?

  • Elite Series Fifth Wheel Hitch Installation Kit for a 2006 Dodge Ram Pickup
  • Yes the # RP30074 custom install kit (see instructions link below) will work with your mega cab. The estimated install time is 120 minutes, but that is for the pros. It would take me longer so I would allow more time unless you have installed these before. When you order the Elite Series fifth-wheel hitch # RP30143, you will need to order for the 8 foot bed to get this option for use with the Fifth Airborne. You will have to drill through the bed of the truck to install the Pucks that the
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  • What is the Difference Between Signature Series Install Kits 30074 and 30067
  • The Signature Series Reese hitches are indeed the puck systems. Both installation kits, part # 30067 and part # 30074, will fit your 2006 Dodge Ram 2500. The 30067 will require drilling the truck frame. The 30074 is a custom designed install kit that will bolt to existing mount locations and clamps around the frame so that no drilling is necessary. This reduces install time and some people do not want to add any holes to their truck frame. Most of our customers choose the custom fit inst
    view full answer...

  • Correct Front To Rear Location of Hitch Rails For Reese Fifth Wheel Kit, # 30074, On 2004 Dodge Ram
  • There are no fore and aft measurements available. The actual location of the hitch rails over the axle is determined by when the hitch rails are connected to the hitch frame brackets under the truck and installed to the frame by drilling or Clamp-on brackets. On the 2004 Dodge Ram the location of the hitch rails is between the two truck cross members that are right above the exhaust and over the gas tank. The hitch rails are slid up on top of the truck frame rails under the truck bed. On s
    view full answer...

  • Will a Standard 5th Wheel Trailer Hitch Fit in a Reese Elite Series Under-Bed Installation Kit
  • Reese under-bed installation kit # RP30074 will only accept the Reese Elite Series of 5th wheel trailer hitches like # RP30142. These hitches fit in the 4 pucks in the truck bed. The feet have a handle that you will turn at each foot to secure the hitch in the pucks. In order to use a 5th wheel trailer hitch that normally fits in above the bed rails with the Elite system, you would have to use an adapter, # RP30156. For a standard 5th wheel installation kit with above the bed rails for you
    view full answer...

  • Reese Signature Series 5th Wheel Install Kit Fits Elite Series Install Kit for 2012 Dodge 3500
  • The Under-Bed Rail and Installation Kit for Reese Elite Series 5th Wheel Trailer Hitches # RP30074 would be considered a fit for a 2012 Dodge Ram 3500 with both an 8 ft bed and 6 ft bed. The Signature Series was the predecessor to the Elite Series. For the truck that you have and the ones that you are considering the Elite Series and Signature Series are compatible products and there is no need for any adapters. Please keep in mind that the bed size is the determining factor for the fit of th
    view full answer...

  • 2013 Dodge Ram 2500 Short Bed Under-Bed Install Kit for Signature Series 5th Wheel Trailer Hitch
  • Yes, the Reese under-bed rail kit # RP30074 will fit your 2013 Dodge Ram 2500 short bed and it will fit the Signature Series 5th wheel trailer hitches. I have included a link to the installation instructions and a link to a video showing a typical installation for you.
    view full answer...

  • Under-bed Fifth Wheel Hitch Install Kit and Sidewinder Recommendations for a 2007 Ram 3500 Short Bed
  • You are correct that the Reese Under-Bed Rail installation kit # RP30074 is confirmed as a fit for your truck. I have included an installation video of this Under-Bed Rail system installed on truck very similar to your. Since you do have a short bed truck, you will need either a sliding hitch or a Sidewinder for sharp cornering and maneuvering. I have included some informational articles about both sliding 5th wheel hitches and sidewinders for your reference. It would work great to use t
    view full answer...

Ram 2500 Accessories

Info for this part was:

Test Fit:
Joe V

Photos by:
Theodore B

Expert Research:
Michael L

Video Edited:
Zack K

Written by:
Lindsey S

Expert Research:
Patrick B

Expert Research:
Michael H

Expert Research:
Jeff D

Expert Research:
Rachael H

Video by:
Alan C

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.

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