Engine work on TR5

Blog 24

The engine work continues with the second six pot unit stripped and away for engineering and the next wet liner unit due to commence being overhauled in a short while.

In the meantime we seem to have been waiting for an overdrive conversion job for ages and as is often the way two have come in together. One of these is on a TR4A and the other on a TR5 so no great differences between the two as they are both using Laycock A type overdrive units.

The opportunity provided by the gearbox being out and stripped to change the mainshaft and machine the remote cover for the inhibitor switches also allows us to check the rest of it and replace any necessary parts at the same time. It is also worth whipping the clutch off to check that and removing the flywheel to inspect the rear crankshaft oil seal too.

With all that done it may be worth carrying out the usual clutch crosshaft mods to remove the broken taper pin problem for the future before fitting the rebuilt overdrive unit to the, also now rebuilt, gearbox and reinstalling into the car with the various new parts required to suit the new transmission condition, wiring it all up, filling the unit with gear oil, running and checking it, making any adjustments necessary before refitting the tunnel and trim.

This conversion isn’t cheap, anyone thinking that it can be done professionally for a couple of hundred pounds is likely to get a nasty shock when being told that they’re out by a factor of ten or thereabouts but it is one of those things you can do to your Triumph which pretty much transforms the driving experience especially on longer trips.