What does a back half kit do on a Jeep YJ?
A back half kit replaces the rear portion of the frame to create more space for wheelbase stretch, improve departure angle, and allow proper shock and chassis packaging for more advanced off-road builds.
Is this a factory replacement rear frame section?
No. This is not a repair section for restoring a stock frame. It is designed for custom builds where the rear chassis layout is being changed for more clearance and suspension room.
Does this allow the wheelbase to be stretched?
Yes. Like a proper back half kit, it is designed to allow the rear axle to be moved rearward without the axle bottoming into the low section of the factory frame.
Will this work with the factory gas tank?
No. This kit requires a fuel cell. The factory gas tank will not work with this rear frame layout.
Why is a back half needed when stretching wheelbase?
The factory frame only has enough up-travel clearance at the original axle location because of the raised section over the axle. Once the axle is moved rearward, it ends up under the lower portion of the factory frame. A back half fixes this by keeping the frame rails high behind the axle.
Can I run coilovers with this kit?
Yes. One of the main reasons for this kit is to create the space needed for proper coilover shock placement and rear suspension packaging.
Does this include a rear bumper?
Yes. The kit includes an integrated rear bumper with 3/4 inch thick d-ring mounts.
Is this a bolt-on part?
No. This is an advanced fabrication system that requires cutting, fitting, and welding.
Should the body be removed during installation?
No. The body should stay on the vehicle so the factory body mounts can be used to help locate the back half during installation.
Is this part of the complete Motobilt frame system?
This kit can be used as a standalone rear chassis upgrade for a Jeep YJ, and it can also be used with the Motobilt front half and mid frame components when building a full frame system.
