Coming in late as usual!
Column change was to allow three passengers in the front bench seats.
Bench seats predated column change. My father's 1947 Vauxhall, with floor mounted lever for the 3 speed box, had a bench seat.
Driving a car solo, with a bench seat meant that you had to hang on to the steering wheel going around right hand corners, to prevent you sliding across the car. In the Ford V8 Pilot, it was a long way across the big seat!
The Ford(son – strictly) van with the Consul engine, or Perkins 4.99 between the front seats, was a 3 speeder. As the linkage wore, it sometimes jammed. A kick under the drivers side floor usually returned life to normal until the next time.
Column changes caused problems on Morris Oxford, Series MO if the little pawl on the end of the die cast lever broke. To get into reverse, you had to move the lever with one hand, whilst pulling the rod up the steering column with the other.
I think that the Austin A90 H pattern was a mirror image of that used on the A70, and A50/A55; just to confuse things.
Renault 16TLs were 4 speed, whilst the 16TX was a 5 speed unit. (Possibly the only successful column change 5 speed?) The R16 was a reliable and durable system. The only problem that I heard was of someone who selected (as he thought) 3rd, but went the wrong side of the gate, at high speed, engaged 1st and let in the clutch with a bang. The next bang was the flywheel bolts shearing!
Renault 4 and Renault 6 cars had a dash mounted lever. In front of the engine, a ring surrounded a vertical gear lever sprouting out of the box, just like a floor mounted lever. Basic but quite effective and reliable.
This was not new, prewar BSA front wheel drive cars used the same arrangement.
Can't recall what the Citroen Light 15 and 22 (Traction Avants) used, but was probably something similar.
The Citroen DS had a column mounted lever which operated the hydraulic valves controlling the transmission. This could be used manually, or as an automatic.
The Standard Vanguard 2 litre engine WAS the original: (Also used in the Triumph 2000 "Razor Edge" saloon) It was derated, and modified for the Ferguson tractor, to run on petrol/paraffin, like most of the contemporary tractors, unless diesel powered.
Preselector boxes were often referred to as Wilson gearboxes after their inventor, but were made by Self Changing Gears of Coventry. The Douglas Tugmaster, powered by Rolls- Royce B80 or B81 petrol engine used a SCG preselector gearbox. This was an aircraft tug, tested to be capable of pulling a Locomtive, trucks and Brake van, with the brakes hard on, along the tracks, (but with a maximum speed of about 25mph on the open road).
Armstrong Siddeley, Riley, Daimler, Lanchester and Crossley cars used preselector gearboxes. You had to remember before changing down, not to have already preselected the lower gear, or you went down two, with a terrible lurch!
The London Transport RT did have a preselector gearbox, with a larger selector assembly on the column than the ones used on cars. (Some preselectors had the occasional unfortunate habit, for no obvious reason, except possibly wear; of the gear change pedal coming back much farther than normal and pinning the driver to the back of the seat). A hefty push with the left foot restored order and space in the cab.
The RouteMaster used an epicyclic box controlled by a system developed by C A V Ltd, to provide automatic transmission.
The gearboxes with the little short (about 2 inches long) lever were not preselector. They were, like the preselectors, epicyclic, but semi automatic. The little lever operated contacts which energised solenoid valves which fed compressed air to rams which operated the appropriate brake band(s) within the gearbox. These boxes would adjust the brake bands for wear automatically. If a solenoid valve stuck, you could end up with two gears engaged at the same time, locking the transmission.
Leyland used a similar system, (Pneumocyclic) but with the lever operating the air valves directly, on the PD3/5 bus chassis, with centrifugal clutch. (It was the normal dry plate clutch but controlled by five bob weights. At idle there was a characteristic clanging sound, as the bob weights rattled against the ring that limited their travel!)
On Southdown Motor Services, there was a raised pad on the floor, in place of the clutch pedal normally there on manual transmissions.
Howard