Triumph TR4A-250 Lower Wishbone Arm Strengthening Brackets
The lower front inner wishbone brackets which are welded to the chassis, are considered weak points of the front suspension as they are often found to be cracked or even broken away from the chassis. This is usually caused by running into pot holes or hitting kerbs. These brackets are easily replaced by a competent chassis repair workshop, and represent a considerable improvement to the earlier TR2, TR3, TR3A and TR4 design. It's a good idea to periodically check these brackets, and have them replaced or reinforced if they are cracked or broken, as this condition presents a severe safety hazard.
We have followed a design from Triumph themselves and produced a strengthening kit which comprises three plates that are welded to the inner wishbone bracket and the chassis.