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Duff rear plate bumper - with a few Todd mods

toddz69

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I watched a new Monster Mike video the other day on some updates to the James Duff rear plate bumper which reminded me to snap some pictures of a few mods I've done to mine that might be useful or interesting to someone else.

If I'm doing the math correctly, this is the 6th rear bumper I've had on my Bronco over the years and it's my favorite to date - hands down. Construction is top notch and its very functional. I like that the spare tire is mounted low enough that I don't have a huge blind spot on the passenger's side of the truck and the eccentric cam latches work great and don't require adjustment.

Michael Duff and crew built a custom 2-jerry can carrier for the driver's side of the bumper for me that's easily removable. I only use that carrier when I'm going on longer trips when I want extra gas or my 5 gallon water jug along.

All of our trucks have their own personality traits (quirks and features as Doug DeMuro might say) and mine is no different. Mine seems to have a bit of a vibration in the rearend that causes it to 'bounce' a little bit on certain road surfaces. It's done this over the years with different axle housings, axle shafts, springs, tires, wheels, nothing seems to change the inherent 'feature'. Every year when I get it emissions tested, I watch the rear end run on the rollers and see the up and down motion. That motion translates into vibration/shaking in the spare tire carriers on certain road surfaces.

When I got the Duff rear bumper, one thing I *didn't* like is that the spare tire bounced/shook more than on the bumper it replaced. It was enough that you could feel the whole truck moving back and forth and I worried about fatiguing the bumper enough that my spare tire might part company with the truck at some point and end up on the freeway. I knew that to solve it, I'd probably have to increase the vertical seating plane for the tire carrier somehow or add some other restraint on the horizontal surface of the bumper to try and restrain it in 2 planes. I visited Paul at Bent Fab here in Phoenix - he's done a lot of work on my rig in the past 10 years and I've always been pleased with his work. We talked over what I wanted, some potential solutions, and I left the truck for him to go to work on it. He came up with a mounting pad on the bumper that the bottom of the nutsert (more on that later) of the Hi-Lift carrier rides on. It effectively gives the horizontal stabilization to the carrier that I was looking for. It won't win any prizes at the car shows but it works. The shaking was probably reduced by 90% with this simple addition.

While the truck was at Bent Fab, I also had him fab a bracket to allow me to mount a Rotopax to the carrier. Here in AZ, I like to carry an extra 2 gallons of water with me at all times - might need it for the cooing system for the Bronco or my personal cooling system if I run into trouble in the backcountry. Paul's solution, as typical of his work, is simple, elegant, and looks good. The Rotopax adds just a slight counterweight on the opposing side of the carrier and is mounted as to not interfere with the tailight or the tailgate.

I hate rattles and my Hi-Lift was rattling on the tire carrier as well. Now I know that the ultimate solution for a rattling Hi-Lift is to leave it at home in the garage but in this case, I'd like to still have it along. I found that the jack base didn't quite sit tight down on the bumper plate so I added a couple pieces of rubber sheet (I think it was originally conveyor belt material?) to the base via pop rivets. Coupled with the mounting nut up top, this put the jack in compression to a small degree and quieted it down. I also had noticed the jack base moved around a lot on rough roads so I drilled a hole in the carrier base and installed a nut-sert. I found a small threaded handle on McMaster-Carr, glued a spacer to it for the proper spacing and stuck it through a hole in the jack base and then into the outsert. This keeps the base of the jack in one spot. Jack problems solved.

For the jerry can carrier, I added nut-serts for mounting the license plate, tie down rings for the ratchet strap that retains the cans, and a small LED light for the license plate. The wiring attaches to the backside of the bumper using some Adel clamps and I added a single Weatherpack connector in the wiring that easily allows me to disconnect the tailgate plate mount light and hook up the light on the jerry can carrier for the license plate. A long trip to CO for Super Cell in 2020 revealed I need to revise my tie-down locations a bit but otherwise it's solid.

Special thanks to Mike and Suzy for working with me on the custom gas can carrier when I ordered this thing a few years back.

I've attached a few pics that hopefully illustrate a few of the things I've done to the bumper.

Todd Z.

Note: After looking closer at my pictures, I realized that I should add the caveat that my truck is not a show truck. It occasionally get a hose pointed in its general direction, but it's a faded almost 54 year old truck that sees a lot of dirt and not a lot of clean up when I return. So I apologize for the dust/dirt/grime you see in the pictures.
 

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toddz69

toddz69

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A few more photos.

Todd Z.
 

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Jdgephar

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Sep 25, 2012
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What do you do about the license plate being covered up?

Sent from my SM-G981U using Tapatalk
 
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toddz69

toddz69

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What do you do about the license plate being covered up?

Sent from my SM-G981U using Tapatalk
I move the plate from the tailgate bracket to the can carrier when I have it on there (hence the LED light and nutserts I mentioned). I didn’t move it for the photos.

Todd Z.
 

bigmuddy

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Todd, is the pad you are using to fix the bouncing made of Delrin or something softer?? Looks like Delrin?

Good mods! I always enjoyed your Todds mods writeup when they were available on AZ bronco back in the day.
 

Yeller

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Looks great Todd! I need to apologize for dirt, means it gets loved and used, which is absolutely perfect!

I need to get with you and schedule a trip to your neck of the country next winter so you can share some of your favorite haunts 😊
 
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toddz69

toddz69

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Todd, is the pad you are using to fix the bouncing made of Delrin or something softer?? Looks like Delrin?

Good mods! I always enjoyed your Todds mods writeup when they were available on AZ bronco back in the day.
Ben - it's delrin or something of a similar durometer. Some sort of UHMW stuff in general, but not as 'slick' as delrin. It's a very hard material. If that mod didn't work, I was going to make a higher durometer bump pad on the back of the bumper to see if that would help.

Todd Z.
 
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toddz69

toddz69

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Looks great Todd! I need to apologize for dirt, means it gets loved and used, which is absolutely perfect!

I need to get with you and schedule a trip to your neck of the country next winter so you can share some of your favorite haunts 😊
Sounds great! You came out for a Stampede or two back in the day, right? Always happy to show folks around and tell stories but I'm not a crawler like you. Much more mild trails if you're ok with that!

Todd Z.
 
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toddz69

toddz69

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Nice.
You going to the Stampede this weekend?
I was hoping to but it now looks like I won't make it up there. I just got the Bronco back on the road yesterday after being down for 4 months waiting on some parts. I have a kitchen pass this weekend and I have a spot or 3 I want to go out and explore.

Todd Z.
 

Yeller

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I was hoping to but it now looks like I won't make it up there. I just got the Bronco back on the road yesterday after being down for 4 months waiting on some parts. I have a kitchen pass this weekend and I have a spot or 3 I want to go out and explore.

Todd Z.
Exploring is perfect. According to my GPS we did 365 miles in the last 6 days. Your probably like me, skip the big event to go alone or with a very small group. We just have to go so far to really have good exploring not much in OK, some national forest in AR. But to really get lost we have to go west to at least NM.

Best day wheeling I’ve ever had at the AZ stampede was the day we left everyone behind and spent the day wandering around. We left late, covered 90 miles and still made it back for dinner with everyone.

The exploring factor is what really keeps drawing me back to Moab. You really can’t go anywhere else that you can base camp for a week in one location and cover 50-100 miles every day, see some amazing things and not miss dinner. Been here I believe 25 times, I’ve truly lost count…. , in the last 21 years. My list of “gotta check it out” never gets shorter. Revisited some good ones but spent time getting acquainted with 5 new trails this week. Only a hundred or so more to go on my list😎
 
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