From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Cross-section diagram and gear ratio table for a Maybach transmission for large vehicles.
| Identifier | ExFiles\Box 128\2\ scan0048 | |
| Date | 2nd March 1931 guessed | |
| Engine end 91215 Section Through New Maybach Transmission for Large Motor Cars, Buses and Utility Vehicles Speed Reduction Over gears IV 1:1 Direct III 1:1.5 1-2-4-3 II 1:2 3-4-5-6 I 1:3 1-2-5-6 I a 1:4,5 1-2-7-8 Reverse 1:4,5 1-2-7-9-10-8 | ||