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make a traction bar. wheel hop is caused by axle wrap, and is magnified if you have any kind of lift blocks. a traction bar is a triangular structure where is it welded to the axle and then to the crossmember across the chassis, connected by a johnny joint to allow suspention travel. i'm real tired right now, and this explination might be a bit foggy. any questions let me know.
There's more than one type of traction bar. Some are just a rod while some are a frame like ladder bars. Some go under the axle and some go above. Some are attached to the frame and some are free and use a bump stop. Depends on your application and how much power your trying to control.