| Description | Date | Identifier | |
| Decision to manufacture the S.S. Rear Axle Bridge Piece as a mild steel forging instead of the suggested die-cast aluminium bronze. | 12th Feb 1929 | Box 12 \ 2 02-page048 | |
| Oil supply methods for the rear axle's hypoid pinion thrust bearings following an experimental report. | 20th Feb 1929 | Box 12 \ 2 02-page049 | |
| Failures with the aluminium portion of the 'SS' rear axle and proposed modifications. | 3rd Mar 1929 | Box 12 \ 2 02-page050 | |
| Modifications to a hypoid rear axle casing to overcome distortion. | 19th Mar 1929 | Box 12 \ 2 02-page051 | |
| Standardised 3-point central lubrication scheme and considering future improvements based on experimental cars and competitor systems. | 1st May 1929 | Box 12 \ 2 02-page052 | |
| The insufficient strength of a rear shock absorber axle bracket, proposing it be materially strengthened. | 25th Apr 1929 | Box 12 \ 2 02-page053 | |
| Weakness in the 'SS' rear axle shock damper bracket and a proposal to strengthen it by thickening. | 1st May 1929 | Box 12 \ 2 02-page054 | |
| Design and supply of Enots nipples with non-return valves and filters for axle lubrication. | 25th May 1929 | Box 12 \ 2 02-page055 | |
| Critiquing a proposal for centralised chassis lubrication and suggesting an alternative scheme. | 1st Jun 1929 | Box 12 \ 2 02-page056 | |
| Tests and recommendations for lubricating oils used in S.S. Hypoid rear axles. | 23th Aug 1929 | Box 12 \ 2 02-page057 | |
| Confirmation of the recommended rear axle lubricant for the Phantom II chassis, including capacity, top-up intervals, and price. | 19th Sep 1929 | Box 12 \ 2 02-page058 | |
| Query regarding whether information on the 'Phantom II' chassis back axle lubrication is included in the instruction book. | 25th Sep 1929 | Box 12 \ 2 02-page059 | |
| Potential performance enhancements for the Phantom II, focusing on axle ratios and suspension. | 11th Oct 1929 | Box 12 \ 2 02-page060 | |
| Revisions and gear type choice for the Sports Phantom II rear axle. | 23th Oct 1929 | Box 12 \ 2 02-page061 | |
| The decision on the 13/41 hypoid gears for the Sports Phantom rear axle. | 25th Oct 1929 | Box 12 \ 2 02-page062 | |
| Back axle, hypoid, and gearing requirements for the Phantom II Sports Car. | 26th Oct 1929 | Box 12 \ 2 02-page063 | |
| Sending N. scheme 2974, a drawing of the standard 11/41 hypoid axle ratio. | 26th Oct 1929 | Box 12 \ 2 02-page064 | |
| Adjustments and issues with the Phantom II brake system. | 30th Oct 1929 | Box 12 \ 2 02-page065 | |
| The application of a screwed backing nut to the Phantom II hypoid axle pinion thrust bearing. | 1st Dec 1929 | Box 12 \ 2 02-page066 | |
| Letter to Buck & Hicman, Ltd. regarding a noisy Hypoid rear axle on a Phantom II due to the failure of the recommended oil compound. | 19th Dec 1929 | Box 12 \ 2 02-page067 | |
| Recommendations for improving the lubrication process for front and rear axles using the Bijur system. | 1st Jan 1930 | Box 12 \ 2 02-page068 | |
| Improvements to the chassis lubrication system, specifically regarding the placement of air-vessels. | 1st Jan 1930 | Box 12 \ 2 02-page069 | |
| Instruction book update regarding the lubrication of axles for 20 HP and Phantom II models. | 1st Jan 1930 | Box 12 \ 2 02-page070 | |
| Modifications to the centralised chassis lubrication system for the Phantom II to incorporate the axles. | 28th Mar 1930 | Box 12 \ 2 02-page071 | |
| Requesting information about the failure of hypoid rear axles in customers' cars. | 15th Apr 1930 | Box 12 \ 2 02-page072 | |
| Urgent depot sheet detailing the oil refilling procedure for Phantom ll rear axles. | 17th Apr 1930 | Box 12 \ 2 02-page073 | |
| Dynamometer tests for hypoid rear axle failures under low oil and low temperature conditions. | 30th Apr 1930 | Box 12 \ 2 02-page074 | |
| Axle oil levels, oil types, and recent pinion tooth failures. | 24th Apr 1930 | Box 12 \ 2 02-page075 | |
| Modifications to the 40/50 HP Chassis rear axle, specifically for the Phantom II model. | 24th Apr 1930 | Box 12 \ 2 02-page076 | |
| The change of a Phantom II rear axle gear ratio from 11-tooth to 12-tooth and the resulting performance test. | 24th Apr 1930 | Box 12 \ 2 02-page077 | |
| Rear axle dynamometer test failures and the comparative performance of two lubricants. | 29th Apr 1930 | Box 12 \ 2 02-page078 | |
| The failure of Phantom II rear axles and dynamometer test loading. | 28th Apr 1930 | Box 12 \ 2 02-page079 | |
| The supply of Whitmores Compound lubricant for the 40/50HP rear axle. | 29th Apr 1930 | Box 12 \ 2 02-page080 | |
| Failures of Phantom II rear axles during dynamometer and road testing. | 1st May 1930 | Box 12 \ 2 02-page081 | |
| Axle testing, comparing different lubricating oils and noting high operating temperatures. | 1st May 1930 | Box 12 \ 2 02-page082 | |
| Investigation into ongoing rear axle failures and related oil tests. | 5th Jun 1930 | Box 12 \ 2 02-page083 | |
| Analysis of axle oil leaks, preventative modifications, and experimental stress testing results. | 30th Sep 1941 | Box 12 \ 2 02-page084 | |
| Efforts to reproduce axle failures which occur despite plentiful lubricant, a problem not yet replicated in experimental tests. | 8th May 1930 | Box 12 \ 2 02-page085 | |
| Fluid drained from Phantom II rear axles, listing mileage and quantities. | 8th May 1930 | Box 12 \ 2 02-page086 | |
| Calculation of the unsprung weight for the Phantom II rear axle. | 4th Jun 1930 | Box 12 \ 2 02-page087 | |
| Error in wheel and tyre weight figures and the intention to reduce road spring weight. | 4th Jun 1930 | Box 12 \ 2 02-page088 | |
| Using Whitmore's and Price's compounds in the gearbox and axles of the Phantom II. | 12th Jun 1930 | Box 12 \ 2 02-page089 | |
| Failure of a Phantom II rear axle during dynamometer testing due to a change in lubricant. | 26th Jun 1930 | Box 12 \ 2 02-page090 | |
| Depot sheet listing rear axle oil top-ups for Phantom II vehicles. | 1st Jul 1930 | Box 12 \ 2 02-page091 | |
| Log sheet detailing vehicle mileage and oil consumption for various owners. | 7th Jul 1930 | Box 12 \ 2 02-page092 | |
| Unsuitability of Price's Compound for dynamometer running of Phantom II gearboxes due to electrolytic action. | 7th Jul 1930 | Box 12 \ 2 02-page093 | |
| Standardisation form for a .5 inch higher rear axle stand pipe to increase oil quantity. | 19th May 1930 | Box 12 \ 2 02-page094 | |
| Standardisation of chassis parts for central oiling to front and rear axles. | 2nd Jun 1930 | Box 12 \ 2 02-page095 | |
| Standardisation of chassis parts for a wider track rear axle to increase seating capacity. | 2nd Jun 1930 | Box 12 \ 2 02-page096 | |
| Design and testing of slings for a rear axle assembly. | 17th Nov 1930 | Box 12 \ 2 02-page097 | |
| Phantom II suspension, focusing on rebound control and axle movement. | 18th Nov 1930 | Box 12 \ 2 02-page098 | |
| Preliminary tests to restrain the rear axle movement on the rebound for the Phantom II suspension. | 17th Nov 1930 | Box 12 \ 2 02-page099 | |
| Suspension tests analyzing different sling lengths and their effect on buffer clearance and axle movement. | 17th Nov 1930 | Box 12 \ 2 02-page100 | |
| Car springing adjustments, specifically regarding increased deflection to improve riding qualities. | 27th Nov 1930 | Box 12 \ 2 02-page101 | |
| Rear axle failure on chassis 83-XJ, outlining possible causes and the decision for replacement. | 19th Dec 1930 | Box 12 \ 2 02-page102 | |
| Axle failure in Canada on chassis 83-XJ, potentially caused by using the wrong lubricant compound. | 22th Dec 1930 | Box 12 \ 2 02-page103 | |
| Letter from the US branch reporting oil leakage issues with the Phantom II rear axle. | 28th Jan 1931 | Box 12 \ 2 02-page104 | |
| Two schemes to cure oil leakage from a Phantom rear axle. | 18th Feb 1931 | Box 12 \ 2 02-page105 | |
| Tests to determine the maximum rebound movement of the Phantom II rear axle under various road conditions. | 20th Apr 1931 | Box 12 \ 2 02-page106 | |
| Graph illustrating the performance of Delco Lovejoy shock dampers, showing the effect of adjustable leak on rear axle movement. | 20th Apr 1931 | Box 12 \ 2 02-page107 | |
| Graph comparing the effect of drilled versus standard valves on maximum rear axle movement during compression and rebound. | 20th Apr 1931 | Box 12 \ 2 02-page108 | |
| Graph showing the effect of adjustable leak on rear axle movement for Delco Lovejoy shock dampers over a hump-backed bridge. | 20th Apr 1931 | Box 12 \ 2 02-page109 | |
| Graph showing the effect of drilled valves on rear axle movement for a 25EX car over a hump-backed bridge. | 20th Apr 1931 | Box 12 \ 2 02-page110 | |
| Trial of 12/41 ratio Hypoid bevel gears for the Phantom II chassis rear axle. | 20th Apr 1931 | Box 12 \ 2 02-page111 | |
| Successful test of a breather system to prevent oil leaks on Phantom II rear axles. | 22th Apr 1931 | Box 12 \ 2 02-page112 | |
| Confirming successful results with a rear axle ventilator and requesting more be made for experimental cars. | 22th Apr 1931 | Box 12 \ 2 02-page113 | |
| The merits and costs of a banjo-type back axle compared to existing and competitor designs. | 7th May 1931 | Box 12 \ 2 02-page114 | |
| Justifying the decision not to change the axle design, comparing it with a cheaper banjo-type axle. | 19th May 1931 | Box 12 \ 2 02-page115 | |
| Design, material selection, and testing of back axle tubes. | 19th May 1931 | Box 12 \ 2 02-page116 | |
| Alternative rear axle ratios for the Phantom II and 25 HP car models. | 20th May 1931 | Box 12 \ 2 02-page117 | |
| Change from carbon steel to nickel steel for axle tubes due to failures and manufacturing processes. | 22th May 1931 | Box 12 \ 2 02-page118 | |
| The material properties and testing (Izod figures) for carbon steel and nickel steel used in axle tubes. | 22th May 1931 | Box 12 \ 2 02-page119 | |
| Various back axle ratios and the preference for using hypoid gears. | 28th May 1931 | Box 12 \ 2 02-page120 | |
| Rear axle ratios, specifically regarding hypoid gears and the 25HP model. | 30th May 1931 | Box 12 \ 2 02-page121 | |
| Higher geared axle ratio tests conducted at Brooklands on Continental Phantom II type cars. | 4th Jun 1931 | Box 12 \ 2 02-page122 | |
| Comparative vehicle performance tests focusing on speed trials, axle ratios, and aerodynamic efficiency. | 4th Jun 1931 | Box 12 \ 2 02-page123 | |
| Summary concluding that the 12 X 41 axle would not improve the standard production Continental Type car. | 4th Jun 1931 | Box 12 \ 2 02-page124 | |
| Higher geared axle ratio tests and the need for increased power for the Continental model to improve competitiveness. | 5th Jun 1931 | Box 12 \ 2 02-page125 | |
| Critique of a proposed breather for the rear axle, noting its failure to prevent water ingress. | 30th Sep 1931 | Box 12 \ 2 02-page126 | |
| Hypoid bevel gear ratios and detail drawings for the Japan III, 20/25 HP, and Phantom 11 models. | 27th Oct 1931 | Box 12 \ 2 02-page127 | |
| Standardisation report for the lubrication of the rear brake actuating shaft to prevent seizure. | 25th Sep 1931 | Box 12 \ 2 02-page128 | |
| Form for standardising chassis parts, detailing implementation, costs, and testing information. | 25th Sep 1931 | Box 12 \ 2 02-page129 | |
| Standardisation of a chassis part, a breather for the rear axle, to reduce oil leaks. | 25th Sep 1931 | Box 12 \ 2 02-page130 | |
| Standardisation form for a new chassis part, detailing its introduction to the O. 2. series. | 8th Aug 1925 | Box 12 \ 2 02-page131 | |
| Standardisation of chassis parts for a rear axle with a 12 x 41 ratio. | 15th Aug 1932 | Box 12 \ 2 02-page132 | |
| Standardisation of chassis parts form regarding the use of 19 inch diameter wheels. | 19th Mar 1929 | Box 12 \ 2 02-page133 | |
| Phantom II axle failures and repairs between 1932 and 1933. | 3rd Jan 1934 | Box 12 \ 2 02-page134 | |
| Axle failures in Phantom II chassis fitted with Wakefield's Gear Ease between 1932 and 1933. | 29th Sep 1933 | Box 12 \ 2 02-page135 | |
| Expressing dissatisfaction with a low gear ratio on car 28-EX and questioning its suitability for a 10,000-mile test. | 15th Jun 1934 | Box 12 \ 2 02-page136 | |
| Phantom II axle ratios and their effect on engine smoothness and noise. | 15th Jun 1934 | Box 12 \ 2 02-page137 | |
| Phantom II axle ratios following a 10,000-mile test and recommending a standard ratio. | 15th Jun 1934 | Box 12 \ 2 02-page138 | |
| Standardisation of parts for the washer adjustment of the crown wheel. | 23th Apr 1934 | Box 12 \ 2 02-page139 | |
| Estimate for the cost of extra jigs, tools, and equipment for the 'T' series chassis. | 1st May 1934 | Box 12 \ 2 02-page140 | |
| Trial and standardization of a 12/41 axle ratio for the Phantom II model. | 10th Jul 1934 | Box 12 \ 2 02-page141 | |
| Confirming the testing of Wakefield's H1 Press oil for hypoid axles. | 27th Sep 1934 | Box 12 \ 2 02-page142 | |
| Standardisation of the 12/41 rear axle to reduce 'fuss' on the Standard Car. | 16th Jul 1934 | Box 12 \ 2 02-page143 | |
| Cost estimation for bringing the 'S' series chassis into production. | 21th Jun 1934 | Box 12 \ 2 02-page144 | |
| Noisy rear axle gears and the replacement of an oil seal for chassis B-169-DK and B-38-EF. | 30th Sep 1935 | Box 12 \ 2 02-page145 | |
| Introduction of a stepped dashboard for improved steering column support and its effects on the scuttle and bonnet. | 11th Nov 1925 | Box 12 \ 3 X704-0001 | |
| Car body and seating design, with considerations for tyres and suspension. | 11th Nov 1925 | Box 12 \ 3 X704-0002 | |
| | | | |
