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Body Extensions For Early 1/4 Ton Jeeps

• CATEGORIES: Advertising & Brochures, Features • TAGS: This site contains affiliate links for which I may be compensated.

UPDATE II (01/22/2024):  A puzzle has been solved. It was the Transport Motor Company that offered a full-width body extension that we’ve seen on several jeeps over the years.


This excerpt is from this document on


UPDATE (09/13/2020): This DENCO body extension brochure appeared as part of the 10/01/1949 Second Supplement of the Willys-Overland Equipment Book brochures. 

Interestingly, the 1948 First Supplement of brochures showed a Newgren collapsible body extension (see a few brochures down or click here) very similar (identical?) to this 1949 DENCO Body Extension brochure. Both extensions offer 7 cubic feet of space and note that a spare tire can be mounted to the side. They also both seem to have the same style of stabilizer bar that connects to the PTO bar. I wonder if Newgren sold this design to Denco in late 1948 or early 1949?




UPDATE 04/28/2020: Someone in Georgia is selling newly built beds.


Originally published in 2016: This may come as a surprise (not) that early jeeps weren’t known for their vast amounts of space. We’ve all seen military photos showing jeeps packed full of stuff, like this SAS desert fighter:


When the war ended and CJ-2As were introduced, a couple companies recognized the need for more room and solved the problem by creating add-on bed extensions (also known as bed extenders and body extensions). These bolted to the back and, usually, had supports that dropped to the PTO bar to help support the extra weight. Then, the tailgate was fixed to the very rear of the extension. The goal of this post is an effort to identify the different companies and their products.

As early as August and September of 1946, two different patents were filed, both by the same people.I have been unable to discover if that first patent model was ever built, but the second one has two sides that fold down similar to the Newgren (shown in #2).

Various Bed Extensions identified so far:

  1. Porter Reed Bed Extension: One of the earliest known bed extensions was produced by Porter & Reed. It was marked along with a half top, creating a truck out of a jeep.
    porter-reed-hardtop-extendedbed-1 porter-reed-hardtop-extendedbed-2
  2. Newgren Bed Extensions: The Newgren Company also entered the bed extension field in the later 1940s with two different versions. The first was their standard bed extension:1947-special-equipment-newgren-body-extension2
    The second model Newgren offered was a collapsable version.
  3. S & B Corporation’s Jeep Panel Body: About the same time Newgren and Porter & Reed introduced their extensions, the S & B Corporation made their own spin on adding more room by selling a kit that converted the jeep into a panel van.
    s-b-corporation-panel-truck-from-cj2a-brochure1-lores s-b-corporation-panel-truck-from-cj2a-brochure2-lores
  4. Koenig Bed Extensions: By 1955, Koenig had entered the market. Whether the company designed their own or bought out one of their competitors isn’t know (to me), but Koenig sold the extensions for at least a decade. This first ad is from 1955, the second from 1960, and the third from the mid-1960s.
    1966-koenig-hardtops-brochure4-extendedHere is an example of a Koenig data plate:
  5. Wall & Borg Bed Extender: In the 1960s, a Lake Tahoe, California, company called Wahl & Borg introduced a unique bed extension. Rather than bolt on to the rear of the jeep, theirs slid out.

There have been a number of bed extensions that have resold over the last ten years on Craigslist and eBay, some attached to jeeps and some by themselves. I have found it difficult to distinguish between them, never having owned or seen that many up close. You can see all the ones documents thus far on eWillys:

Derek Redmond also has some excellent information on extensions over at the CJ-3B Page.


11 Comments on “Body Extensions For Early 1/4 Ton Jeeps

  1. Lew

    Thanks Dave. This is one I will follow as it develops. Had no idea there was a folding semi-portable one. Id be all over that if I could find one or good dimensions to fab one.

  2. SE Pennsylvania Steve

    Thanks Dave. And without the internet all this info probably couldn’t be found, and we all wouldn’t know about it.

  3. Matt

    Hey Dave-
    This is great! I think (hope) this will help other folks take a look at what they have and maybe send in some pictures to you. The one I just got seems to have the lower supports (which are angle iron) bolted around the middle of the box underneath and not out by the tail gate. I’m still trying to determine what kind of extension it is but after seeing this info, (thank you by the way) I’m leaning towards Newgren or Porter & Reed.

  4. Joe DeYoung

    I have a bed extension that doesn’t seem home made but it doesn’t have a tag on it either. Were there any manufacturers that didn’t put a tag on them?

    Also, I have an S&B body extension on a 2A and I’ve never seen actual pis or even known of another one out there. Does anyone else have one of these?

  5. Mike

    Thanks for putting this together Dave, Had no idea that there were so many different bed extension manufacturers.

  6. David Eilers Post author

    Glad you guys liked this. You can thank Matt for the inspiration.

    Joe: I didn’t know there were any S & B panel kits out there. That’s awesome!

    I could not find an example of a Newgren extension bed tag, but here is an example of a Newgren Company plow tag ( ). I would expect if they put one on a bed extension it would look similar:

    As for Porter & Reed, I could find any bed extension or hardtop tag examples.

    Finally, there were likely plenty of home-built extensions, some better than others. This adds murk to identifying production extensions.

  7. David Eilers Post author

    Thanks Dave. Even if it is a Koenig, it would be great to get a better image of the tag.

  8. Matt

    Thanks Dave.
    All this is great. Maybe this could wind up being a “spotters
    guide” of sorts? You’d think the other manufactures (that dont have tags on) would stamp them with i.d./model numbers or something- maybe not.

    I’m headed to the shop today and I’ll take some more pics of Ruby’s extender.

  9. anonymous

    I must have the ” NEWGREN ” body extension — it has full size piano hinges — folds — side tire mount on it — I still cant find it though — it should be in the barn — unless someone stole it ?

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