HMC- ‘29 Austin 12/4

[somewhatfoolish]

It's not a clutch, the pedal just tells the box to shift. How it works.

[lesapandre]

In effect it's a big foot-operated switch between ratios which are 'pre-selected' on the column.

[Sigmund Fraud]

The Wilson/Daimler box uses epicyclic gears, brake bands for gear selection, and a torque converter. I'm not an engineer, so my little brain can best make sense of it as an automatic box without the automatic selection.

They were amazing compared to the manual boxes that were around in the 1930s, but by the mid 1950s they had become so much of an anachronism that even Daimler began fitting fully automatic boxes.

If you slip the gear selector pedal like a clutch, you are basically putting quite a lot of torque through the tiny friction surface of a brake band. Said brake band will soon wear out, resulting in the box slipping. There is a small amount of adjustment possible, but once you've run out of friction material the box needs to be taken apart and the brake band reconditioned (because it's certainly not a part that GSF keep on the shelf !).

[andy18s]

On 26/12/2024 at 14:54, Matty said:

It's genuinely getting to the point that you can only surpass yourself next time by buying a 1920s biplane or something similar 🤣

Funny you should say that ..