Written by club member - Chris Schultz.
Having experienced three failures of the attachment points - the last one during five o'clock traffic pouring over the Koeberg interchange - I had the stiffeners fitted during the last rebuild. Perhaps the owners of 4As, 5s and 6s will find the information useful.
I am of the opinion that, bearing in mind the age of these models and the hard driving they have been subjected to, reinforcing the attachment brackets and adding the extra bolt is essential.
The TR2 chassis assembly was built up with a pair of suspension pillars braced against inward collapse by a cross-tube - which had to be removable to allow the engine to be dropped in relatively easily. Through a paid of fore & aft holes near the base of the pillar was passed a solid steel pin of substantial proportions having three diameters: the central part that passed through the pillar, a pair of plain machined surfaces to carry the wishbones, and - at the outer ends - a threaded portion. The pin was fixed in place by a bracket either side of the pillar and a further pair of brackets, each with a small pair of holes, was welded to the chassis at the point where the threaded portion of the pin commenced.
When the suspension was assembled and the small removable brackets were secured to the pain and also (with a pair of nuts and bolts) to the chassis, the whole formed a remarkably strong unit. Examples I have seen of TR2/3/4 cars where the front suspension has been damaged in a prang have the fulcrum pin apparently undamaged, but bodily turned in relation to the chassis side member. When this occurs, the brackets are partially or even completely broken from the chassis at the welds, but total collapse of the suspension at this point is most unusual. It is always worth checking the fulcrum pin alignment when contemplating the purchase of a TR2/3/4, as it's easily done by eye with the bonnet raised. The pin should be parallel with the outer edge of the chassis, and the welding of the brackets should be intact.
It is a fairly expensive and skilled job to correct any crash damage as the brackets must be removed from both fulcrum pin and chassis, the pin withdrawn from the pillar (to which it has likely become corroded) and inspected for damage, and the whole reassembled in the correct position. Replacement fulcrum pins are not available, although they have a part number.