Triumph TR6 Propshaft
The engineers at Triumph were clever enough when they designed the TR2-6 series of sports cars to produce a gearbox that when fitted with overdrive was virtually the same length as the non-overdrive version. This is an absolute bonus for spares stockists of propeller shafts as ‘one size fits all’. From a vehicle engineering point of view it shows skill and understanding of the various options that could have been offered.
The TR6 suffers periodically from loosening of the nuts and bolts that attach the propeller shaft to the gearbox or axle drive flanges. Overdrive models are perhaps more prone to this than those with standard transmission. An engineering adhesive such as ‘Loctite’ (GAC100) can be used when assembling the propeller shaft bolts and nuts. Alternative nuts such as the ‘Cleveloc’ all steel type do prove more positive than the original nyloc form. Whenever the propeller shaft bolts are undone it is recommended that the nuts be replaced as a full set. Loose bolts can be identified by the noise of the propeller shaft rattling or an unbalanced vibration. If the bolts have been run loose it will invariably mean that the bolts will be damaged or worse still the holes in the flange yokes or drive flanges are elongated.