In 2 years, I had 4 broken gearbox casing : maybe one of these can be
repaired : it has a crack where the bottom of the gear casing and the rear
wall are mating. Considering the weight of the engine and gearbox, the
stresses at that point must be very high : the 4 cylinder TR's have 2
mountings at the front of the engine and 1 mounting at the gearbox
extension. A gearbox with overdrive has this rear mounting at the very end
of this extension : the shearing force between casing and extension must be
very high, one should think that the rear wall of the casing should be
pulled out all the time in racing. Has someone tried welding a gearbox
casing?
Marcel
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