J&M 1979-1993 Mustang Adjustable Bumpsteer Kit

J&M Products – 1979-1993 Ford Mustang Adjustable Bump Steer Kit (Power Rack)

Part # 24510  –  Bump-Steer Kit

Made In The USA!

J&M Products has manufactured a Fox Body Bump Steer kit with Aerospace T6511-6011 aluminum. The spherical rod end bodies are manufactured from heat treated chrome moly alloy steel and are then clear zinc plated. The Ball in the body is PTFE lined 52100 steel (Rc 56 MIN) and hard chrome plated rated at a static radial load of 18,000 lbs.

The tapered stud is machined from forged 4340 chrome moly and heat treated to the tensile strength of a grade 8 bolt, the threads on the stud are rolled not cut after the heat treating process to assure strength. The tapered stud tensile strength is 150,000 lbs per square inch and heat treated to a minimum of Rockwell hardness of C-33.

What is Bump steer?

When a car is lowered or lifted, it will have to be re-aligned to avoid excessive tire wear. This is accomplished through adjustment of the steering tie rod length. After the tie rod lengths are changed, bump steer values will also change. In some cases, the car will have less toe change, this can make the car exhibit less roll understeer and therefore feel more “twitchy” during a turn. Other vehicles after lowering will exhibit an increase in toe change compared to stock, this results in the car feeling very “twitchy” on straight, bumpy roads, and at the same time feeling unwilling to turn requiring more driver input than normal due to an increase in roll understeer.

When a vehicle is heavily loaded, it lowers the ride height. Typically cars are loaded by having heavy loads in the trunk, many passengers or towing a trailer, thus mainly affecting the rear wheels. When a car has been heavily loaded (if it does not have a live rear axle), the suspension will compress greatly in order to support the load resulting in an extreme amount of toe in on the rear wheels. This causes rapid tire wear, can cause the car to follow cracks in the road and can cause tire temperatures to rise higher than normal due to an increase in friction. Negative Camber will often be greatly increased as well. This results in very heavy inner tire wear on the rear wheels of a car that is heavily loaded or towing. One reason that most trucks have live axle rear suspensions is because it completely avoids toe and camber changes with a load. Cars with multi-link rear suspension should have an alignment while loaded if they are going to be operated under heavy loads for extended periods.

Features and Benefits:

• Corrects Bump steer, prevents uneven tire wear and unpredictable steering
• A necessary addition for lowered cars
• Tapered pin is correct size, not necessary to drill out spindle or use a bushing for proper fit
• Easily adjustable, hex adjustment on both ends
• Works in conjunction with other suspension modification
• Mil-A-8625 Type II Black Anodized finish for corrosion resistance
• Fits All 79-93 Mustangs with Power Racks (does not work on manual racks)
• Replaces factory tie rod ends with spherical rod ends for precise steering control
• Aerospace T6511-6011 aluminum
• Rod end bodies are constructed of heat treated chrome moly alloy steel and clear zinc coated
• Tapered stud is machined from forged unique 4340 chrome moly, and heat treated to the tensile strength of a grade 8 bolt
• The ball in the body is 52100 steel and hard chrome plated
• Threads are rolled not cut after the heat treat process for maximum strength
• Rod end liner is sintered bronze with PTFE impregnated for the strongest liner on the market.  (not the standard PTFE liner)