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Jeep FlatfendersQuick Tips to ID Your Favorite Flattie From the March, 2009 issue of 4Wheel & Off-Road
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 Rear storage compartments...  Rear storage compartments in a MB or a GPW also mean the wheelwells are wider than in later Jeeps. Hence, the rear seat is narrower. Since this provides for more tire area within the wheelwells, wider tires can be run without sacrificing articulation. The small box on the floor encloses the shock tower on the frame. Later Jeeps had a flat floorpan with lower shock brackets on the frame.  Underneath the CJ-2A, -3A,...  Underneath the CJ-2A, -3A, and -3B passenger seat is a storage compartment built into the floor. This is a handy place for tools, but it collects water, which causes rust and the loss of said tools and garbage. The word Jeep was embossed on the floor.  The basic dash for flatties...  The basic dash for flatties contains the speedo in the center, surrounded by the ammeter, oil pressure, water temperature, and gas gauges. The two holes above the gauges on this early MB are for instrument lights, while the civvy style had only a single light. The hole to the right is for the E-brake handle, while the later M38 had the E-brake on the left side of the column. The dash has a shallow depression that the steering column is bolted into, while later models have a taller depression. Notice that this very early MB lacks a glovebox, while all Fords and later WWII Willys have a glovebox on the passenger side.  A Spartan interior and dash...  A Spartan interior and dash are all that is needed on any real Jeep. The same gauge arrangement and E-brake handle is used on 2As and 3As, but dashboards differ from earlier military models in that the glove box is gone, and a single, center-mounted dash light is used. The steering column is also mounted higher in the dash, and the space above the column was originally used for the column shifter of early CJ-2s (arrow). The transmission cover was raised and set back farther than on the MB, due to the use of a slightly larger T-90 transmission. Early CJ-3Bs used the standard dash design, but later ones used the large speedometer cluster of the CJ-5.  Two data plates are affixed...  Two data plates are affixed to the passenger-side firewall on both the CJ-2A and -3A (arrow), while the CJ-3B has only one, usually on the driver side. A common engine conversion was the F-head four-cylinder from the later CJ-3B and CJ-5 Jeeps, as it was nearly a bolt-in and provided a few extra horses, even though they were both 134ci displacement. The stock F-head carb sat higher on the engine and required a hole to be cut in the hood. But a small Holley carb could be fitted (as shown) with a different air cleaner arrangement that left the classic lines of the flat hood intact.  While none of the WWII Jeeps...  While none of the WWII Jeeps has a tailgate, many attempts have been made to install one, and in this Jeep it was welded back in place. Notice the remnants of the Willys logo (arrow) typical of very early production MBs. Ford also embossed its logo in script on the rear, but the military decided to eliminate any advertising and requested that a gas can carrier be installed in the area. Script Ford and Willys Jeeps are quite rare. The taillight was originally recessed into the body on a bracket, but this is commonly converted to the style shown.  With the introduction of the...  With the introduction of the tailgate on the CJ-2A, the spare tire was moved to the passenger side and a bracket was added behind the body to strengthen the side panel. Lots of factory options were available, including this aluminum hard top and these nifty little side steps. For agricultural work, plows and other implements were offered to increase the vehicles operational value.  On the rear corners of CJ-2A...  On the rear corners of CJ-2A tubs are small tubes; these are used for the factory soft top bows when the top is up. When the bows are stored, they fit into two sheet metal pockets welded to the passenger side, one near the rear and one close to the driver&8217s elbow on the outside of the body. On the CJ-2A, -3A, -3B, and DJ-3A, the tailgate has slotted hinges so it can be removed. Chains hold the gate closed and support it in the open position. Notice the externally mounted taillight on the driver side only, as only one was required.  As with the WWII design, the...  As with the WWII design, the gas can carrier and spare tire on the M38 are mounted on the rear. A tailgate is used, although it is always bolted shut instead of chained, since chains would rattle and make noise. The tailgate does not have Willys stamped in the center, and it also has extra reinforcement ribs for the spare tire mounting rack. This non- stock rear crossmember is similar to the original, as it features lifting hooks and a pintle hook in the center.  A standard-size gas filler...  A standard-size gas filler was fitted on the CJ2A with an exterior fill, eliminating the need to lift the seat cushion as in the MB. This location and fill design lasted in the CJ series until 1972, when the government mandated the elimination of passenger compartment fuel tanks. Although gas would leak past a worn-out gas cap on side hills, the location proved handy for visual verification of the fuel level, and a handy stick could be inserted if the gas gauge was broken.  The side fill on an M38 is...  The side fill on an M38 is similar to the civilian flatties, but the opening is large enough to stick your hand into. The extension shown pulls out of the tank to facilitate refueling from a jerrycan without a spout. Unlike the lifting handles on the sides and corners of the MB, the large grab handle around the filler is more for protection of the cap than for lifting.  The introduction of the CJ-2A...  The introduction of the CJ-2A brought a grille design that carried through to the last CJ-7 in 1986. The larger 6-inch round headlights were closer together than on the MB, and the grille only had seven slots. The parking lights shown here are a typical aftermarket addition that replaces the small original style, and the headlight bezels were originally stainless steel, not painted. The CJ-3A had a similar grille, with slightly different parking lights and smaller, rounder headlight bezels. The CJ-3B grille was taller and embossed with Willys.  Brushguards over the headlight...  Brushguards over the headlight typify an M38 grille, and the headlight bezel is more square than the civilian style. The grille is hinged onto the frame and can pivot forward and be removed. The parking lights are actually blackout marker lights and are recessed behind the grille. The early Warn 8074 winch fits nicely between the stock grille and bumper with minimal modifications.  Other than the grille, the...  Other than the grille, the CJ2-A&8217s other significant feature was the taller windshield frame, which was due to the increased width of steel between the cowl and the bottom of the glass as compared to the MB. This area also allowed the Willys name (shown here on the backside) to be embossed on the frame, as it was on both sides of the hood and in the center of the tailgate. The lever shown here is part of the mechanism used to keep the fold-out part of the windshield closed, and is also rare item.  Military M38 models feature...  Military M38 models feature a CJ-3A-style one-piece windshield; however, the center vent is bolted shut and not movable as it is on the 3A. The cowl has a lid for the battery box, and the hood has a cutout for a snorkle option. Like the MB, the hood is devoid of the Willys name.  Chassis frames of MBs and...  Chassis frames of MBs and CJ-2As have the front bumper attached by upper and lower gussets. This allows the bumper to take a beating while the frame remains intact. Very little, if any, boxing is evident on the front of the frame, except for the Ford variety, so cracks and bends often appear after years of service. The front crossmember is a round tube on all civilian and military Willys, while the Ford models used an inverted U channel. The center tab in front of the crossmember is for the extra grille mounting point of the WWII model. On Willys, the frame number is on an aluminum tag riveted to the left side inner frame rail near the gussets, while Fords had the number stamped on top of the frame rail behind the left motor mount bracket. Body data plates are affixed to the glovebox door on the passenger side.  CJ-3A and -3B frames eliminated...  CJ-3A and -3B frames eliminated the earlier gussetted bumper design and had the frame horns enlarged to fit the standard bumper. The round crossmember was retained, but the grille of the 2A and 3A doesn&8217t bolt to it in the center. Boxing of the frame is limited to areas behind the crossmember, but savvy owners usually add some reinforcement up front to prevent damage. The later M38 frame was gusseted in this area and proved much more substantial.  Another tip on frame ID is...  Another tip on frame ID is how the transmission crossmember is mounted. Two tabs drop down to enclose the U-channel ends of the crossmember on WWII models and the CJ-2A. This photo shows a drop-down extension fitted to relieve driveline angles, but the basic two-side-bolt, one-center-bolt design is retained. The CJ-3A and later models use a similar crossmember, but it is bolted flush and flat at the frame with two bolts per side pointing straight up. As with almost any Jeep, the later crossmember can be retrofitted to earlier versions by drilling some holes in the frame.  Stock rear axles of MBs and...  Stock rear axles of MBs and GPWs consist of a full-floating Dana 25 rear with 4.88 gears. The full-floating axle was a great idea; the differential interchanged with the Dana 25 front axle, which all the flatties used. But snapped rear axleshafts were common because the diameter was too small for rough service. The two double-nutted bolts are used to take out the axle once the retaining bolts are removed. The hub was flat under these bolts, so screwing them in would force the axleshaft out for removal.  A lemon-shaped cover identifies...  A lemon-shaped cover identifies the Dana model 41 rear axle found in CJ-2As. This axle uses the same spider gears and axleshafts as the Dana 44 found in CJ-3A and later CJs, but has different ring-and-pinion gears and carrier. While the Dana 41 was strong enough for most uses, the popular Dana 44 found its way into many a CJ-2A as the original 41 axles became shredded. Notice how severely the housing is offset to the right to match up with the output of the stock Dana 18 transfer case found in all 4x4 flatfenders.  A CJ-3A windshield is affixed...  A CJ-3A windshield is affixed to a fiberglass flatfender with a MB grill. You&8217d never guess what year it really is, much less the designation.  To test your knowledge, try...  To test your knowledge, try to ID this vintage flattie using the aforementioned information. Despite the extensive body modifications, custom top, and blurry photograph, the clues are readily visible. Two hints: the number of grille slats and the height of the windshield (which doesn&8217t say Willys). No matter what body style Jeep you believe is the best, the first Willys flatfender is the original. For that matter, many die-hard purist believe real Jeeps ceased production in 1952 when the last regular flattie rolled off the assembly line in beautiful downtown Toledo. These same oldsters have a hard time acknowledging the other flatfender styles that were produced after this date, all the way through 1968. A '68 flatfender? Yes indeed, and if you include foreign-manufactured flatties you can probably source a '98 model if you try hard enough. Regardless of where or when a flattie was made, the basic premise of the body design and how to identify the variations are what we're concerned with here. For instance, the main identifying feature of all flatties are the completely flat fenders (notwithstanding dents and depressions from use or abuse). But of course fender ID alone just won't cut it to nail a flatfender, since we've actually seen original flat fenders grafted onto a late model Wrangler. For the uninitiated, it's often easier to ascertain what is not a flatfender. For example, the renowned Jeep CJ-5 body style most people are familiar with is a direct outgrowth of the earlier flatfender. While the flatfender had nice angular shapes to all of its sheetmetal, the CJ-5 was rounded off on all corners and surfaces. In fact, in the '50s, the Director of Architecture and Design of the New York Museum of Modern Art noted that this later design was "a typical case of styling--and ugly styling at that--ruining a good, clear example of machine art. It is the usual case of bloating used to make cars look bigger by adding unnecessary curves." Perhaps harsh criticism of the CJ-5 styling, but it does reflect nicely on the classic styling of the original flatfender. Hence the phrase, "Real Jeeps have flat fenders." Identifying a flatfender as a particular year or model is a real challenge, since they were some of the most changed (and interchanged) vehicles ever made. A 100-percent-stock museum piece is easy to ID, but few of these are on the trail today. For the most part, identification depends on how closely you look. From far away the silhouette of all flatfenders is virtually identical, especially if the windshield is down. The closer one looks at distinguishing characteristics, the closer one can get to determining which model the major components are from, or whether the vehicle is simply a combination of nearly 60 years of flatfender parts. Since the drivetrain is one of the first items swapped in or out of a Jeep, we've decided not to dwell on what came with what model, except for a few interesting parts that can aid in the ID process. For instance, the original engine for all flatfenders from 1941 through 1965, except the CJ-3B, was the flathead four-cylinder (even these have a zillion little differences documented for different years and models). Of course, there are always exceptions to the rule. One example is that some early CJ-2s didn't have a storage compartment under the passenger seat, and some early MBs lacked a glovebox. But for the most part, picking a flattie out of a herd of other 4x4s is easy. For any model, the major places to look for differences are the grille, the windshield frame, and the body tub. These are the simplest identifying features, even though they can be swapped among all the flatfender models.
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