GCM 4TEN Leaf Spring Scale Combo Kit is shown here. This fits AXIAL conversions.

4TEN releases for sale September 2010, all option parts expected to release for sale October 2010. Please see Introductory information video below for a run down on the available setups and our 10 inch wheelbase setup. More setup videos will follow in September 2010.

There comes a time in the life of any scale modeller when we want to go to the next level. THIS is the next level. Introducing the 4TEN combo from GCM Racing.

Right from the first 3D design, we intended to make this the scale platform to fit any 1/10 scale modelling needs. Using a Tamiya 9808091 (from F-350 HiLift) or 9808205 (from Tundra) Leaf spring set and Axial driveline components, this complete scale C-channel chassis allows for a wheel base setup from 10 inches all the way up to 12.86 by flipping spring eye hangers and using rear mounting holes. To further the compatibility the chassis allows for 8 different mounting heights for the GCM bulletproof Transfer Case. The setups available for this narrow 78.4mm chassis are almost endless considering you can swap in a 4 link setup to the front or rear any time, as well as 3 different shock mounting positions PER WHEEL, which allows for a wide range of shocks from 1/18 Mini Rock Crawler shocks right up to Traxxas Big Bores or Proline/Axial scaler shocks. Add to that the use of the popular and inexpensive Axial drive axles (or others) there's a setup waiting to satisfy you with the ALL NEW 4TEN chassis from GCM. And with gearing options up to 19/87 on the motor spur combination there's still plenty of room for a speedy rig.

The new 4TEN chassis design adopts some of the proven chassis and balance geometry used in our GCM CrossCanyon Scaler Conversion kits, and allows the use of the Axial center transmission mounted up front where it belongs. This, along with the front mounted motor and frame mounted front steering servo, allow for a proper weight balance for scale trail and rock crawling as well as a low Center of Gravity. The Transfer case mounted mid-frame allows for ideal driveshaft angles as well as ample room for interior details and electrics. The all new rear shock bridge allows angle mounting of the rear shocks and keeps the crossmember down low for easy pickup box mounting or cage work. The Chassis has 3 deg of designed-in castor to correct pinion angles for the front and rear without the use of angle spring blocks. With a total frame length of 17.6 inches on the rails, the Toyota FJ users will love the long front frames for a winch mount, and the rear can be trimmed down to length any time to match the body and bumper mounts used in the build.

Here are some setup specs. The Tamiya 9808091 (from F-350 HiLift) Leaf spring is 4.5 inches from eye to eye, where as the 9808205 (from Tundra) Leaf spring is 3.75 inches eye to eye. This will change your front wheel well location and allow for short front overhangs, like the Tamiya 10 inch wheelbase FJ or the NewBright 10 inch wheelbase YJ Jeep. In these cases you should use the Tundra Leaf to keep the front wheelwell on the body in the right location to cover over all the front end components. A body length of at least 14.5 inches would be perfect when using the Tundra leaf spring setup. This length will line up the front wheel well and cover the spring hangers completely and has a nose-to-wheelwell front measurement of 2.1 inches minimum. If you want to have that mean old leaf sprung frame look, and stick the frames out the front of the truck, this setup only really needs 1.5 inches of nose-to-wheelwell measurement to cover the steering servo completely, but the front spring hangers would be ahead of the body in this case. The rear of the frame set can be trimmed to fit the length of your finished truck and match exactly to suit. If you have a rear bumper or tube work, simply bolt it on to the frame set on the front or rear, and trim to fit as required. We are using a NewBright YJ 10 inch wheelbase Jeep for this setup.

Because the F-350 Tamiya spring is longer, this will require a longer total body length to cover the spring hangers. When using these longer leaf springs, the total body length needed to cover the springs is 15.4 inches. In this case, you still have a 10 inch wheelbase, but the longer spring has a nose-to-wheelwell front measurement of 2.5 inches minimum. We are using a Proline 3246-00 F100 '56 Ford for this setup, and an 11.1 inch wheelbase.

Shown here are some of the assembly pictures from the frames and components before Black Anodize finish was applied. All of the bits will be finished in Black before shipment.

The Axle Spring mounts are shown below. These allow for up to 3 leaf springs thick and function perfectly with no part changes. The upper shock mount can be used in the inboard position in the rear or the outward position in the front simply by reversing the bracket at installation. The spring mounts are a 3 piece unit: The lower section locks into the trimmed Axial axle, and holds the screw threads. The mid plate locks on to the top of the Axial axle, and locates the center spring mounting hole. This whole unit is sandwiched by the top plate/shock mount and held in place with 4 M3 screws. The top plate also has interlocking sides that keep the springs in line at all times and lock onto the midplate as well. The pictures below show a stock Axial axle, then the axle trimmed down, and finally the assembly of the spring mounts on the axle. The parts are shown in silver for picture clarity, and when finished in Black anodize, the spring mounts are barely visible at all.

Each Combo Kit will include the following parts, every part in Black Anodize only:

2 C-Channel aluminum frame rails

1 Front Axial trans/motor mount

1 GCM T-Case Complete kit

2 Mid Mount T-Case Brackets

1 set- Trans to T-Case cups and dogbone

1 Front Servo Mount

1 Rear Shock Bridge

2 right side Front Spring Eyes

2 left side Front Spring Eyes

8 Swing Shackles (stock and 3 inch lift)

8 Axle Spring mounts (stock and 3 inch lift)

Here shown below are some of the pictures from the rolling assembly. You can see here how the entire chassis (set at 11.2 inch wheelbase) holds the truck in a nice stock-looking proportion. Imagine this sitting under your GM 'K' Blazer or old stepside 50's truck. Shown here also are the GCM Rotors and Cast Aluminum wheel sets.

Please see the 4TEN Assembly Tech Information Video below for assembly and setup tips and hints.

We already have many add-on option parts planned for this chassis. They include Scale 3 inch suspension lift kit, Remote Servo Bellcrank steering assembly (steering box), Scale Frame crossmembers, and some other goodies. Stay tuned.

The chassis is currently in production and will be ready for full release in a very short time. Stay tuned for production pictures and updates.

Please see the shopping page for pricing and availability.