| Description | Date | Identifier | |
| Proposed modifications to the back axle, track, and brake gear due to an increase in engine power. | 16th Jan 1931 | Box 102 \ 4 scan0061 | |
| Modifications to the rear axle and brakes, including increasing the track and shaft diameter. | 31th Jan 1931 | Box 102 \ 4 scan0062 | |
| Modifications to a hypoid axle centre casing, N. sch. 3206, for the Japan 3 project. | 3rd Feb 1931 | Box 102 \ 4 scan0063 | |
| Schematics for the 'JAPAN 3' project's rear axle and brakes, including notes on economization and brake drum size. | 5th Feb 1931 | Box 102 \ 4 scan0064 | |
| Secret memorandum regarding a revision to the lock nut adjustment for the Japan 3 rear axle. | 10th Feb 1931 | Box 102 \ 4 scan0065 | |
| Advantages and manufacturing costs of the banjo type axle compared to current designs. | 7th May 1931 | Box 102 \ 4 scan0066 | |
| Decision not to change the current axle design, comparing it to a banjo type. | 5th May 1931 | Box 102 \ 4 scan0067 | |
| Noise issues, testing, and modifications for the 20/25HP Hypoid Axle. | 5th May 1931 | Box 102 \ 4 scan0068 | |
| Rear axle gear ratios for the Phantom II and 25 HP models. | 20th May 1931 | Box 102 \ 4 scan0069 | |
| Change in steel type for back axle tubes and manufacturing methods. | 22th May 1931 | Box 102 \ 4 scan0070 | |
| The toughness and brittleness of carbon and nickel steels used for axle tubes. | 22th May 1931 | Box 102 \ 4 scan0071 | |
| Back axle gear ratios and advocating for the use of hypoid gears. | 28th May 1931 | Box 102 \ 4 scan0072 | |
| Material and manufacturing options for future 25HP back axle tubes. | 28th May 1931 | Box 102 \ 4 scan0073 | |
| Investigating cost reductions for future 25 HP back axle tubes. | 29th May 1931 | Box 102 \ 4 scan0074 | |
| Rear axle ratios and the design of hypoid gears for the 25HP model. | 30th May 1931 | Box 102 \ 4 scan0075 | |
| Communication regarding a modification to the J.3. Rear Axle centre box. | 20th Aug 1931 | Box 102 \ 4 scan0076 | |
| The design of a new back axle and rear brakes for the J.3. project. | 28th Mar 1931 | Box 102 \ 4 scan0077 | |
| Suggestion for producing a cheaper J.3. Rear Axle tube. | 4th Sep 1931 | Box 102 \ 4 scan0078 | |
| The layout of the frame, transmission, and springs for project J.3. | 7th Sep 1931 | Box 102 \ 4 scan0079 | |
| Design alternatives for a rear axle and brakes, referencing specific schematics. | 23th Sep 1931 | Box 102 \ 4 scan0080 | |
| Reduction ratios for Hypoid bevel gears for various models including the Japan III, 20/25 HP, and Phantom 11. | 27th Oct 1931 | Box 102 \ 4 scan0081 | |
| Standardisation of the rear axle driving flange to cheapen production costs. | 5th Jan 1932 | Box 102 \ 4 scan0082 | |
| Standardisation form for a new chassis part, detailing the first chassis for fitting, test date, and tooling costs. | 1st Mar 1932 | Box 102 \ 4 scan0083 | |
| Reduction in height for the rear axle's ventilated filler plug. | 24th Feb 1932 | Box 102 \ 4 scan0084 | |
| Issues with back axle control and proposing a new design. | 12th Dec 1932 | Box 102 \ 4 scan0085 | |
| Confirming the satisfactory performance of a Shatz type thrust bearing in a 20/25 HP rear axle. | 24th Sep 1934 | Box 102 \ 4 scan0086 | |
| Condition of a roller bearing and crown wheel adjustment on a 20/25 HP rear axle. | 1st Oct 1934 | Box 102 \ 4 scan0087 | |
| Standardisation report on replacing a ball bearing with a Shatz type thrust bearing for cost reduction. | 28th Sep 1934 | Box 102 \ 4 scan0088 | |
| Estimated cost for extra jigs, tools, and equipment for the 'H' series chassis production. | 16th Oct 1934 | Box 102 \ 4 scan0089 | |
| Modifications to the hypoid rear axle for the 20/25 and Wraith models. | 31th Jan 1935 | Box 102 \ 4 scan0090 | |
| Modifications to a 20/25 hypoid rear axle, strengthened to take a 4 1/4 litre J3 engine. | 17th Apr 1935 | Box 102 \ 4 scan0091 | |
| Modified sheet metal crossmember for the hypoid rear axle on a 20/25 model. | 29th Apr 1935 | Box 102 \ 4 scan0092 | |
| Modifications to the Hypoid Rear Axle on the 20/25 model. | 29th Apr 1935 | Box 102 \ 4 scan0093 | |
| Investigating the use of 9/41 hypoids from a 1930 model on 20/25 rear axles. | 2nd May 1935 | Box 102 \ 4 scan0094 | |
| Inspection report on 20/25 Hypoid gears after a 10,000-mile test, listing modifications needed for use in a new axle casing. | 9th May 1935 | Box 102 \ 4 scan0095 | |
| Request to dismantle and examine a rear axle and re-line brakes due to performance issues. | 13th Jun 1935 | Box 102 \ 4 scan0096 | |
| Standardisation of the hypoid rear axle for the 20/25 HP chassis. | 28th Oct 1935 | Box 102 \ 4 scan0097 | |
| Modified bevel pinion driving taper for the J.3. rear axle on a 20/25 HP car. | 12th Dec 1935 | Box 102 \ 4 scan0098 | |
| Request to alter the seals on the 20/25 Hypoid Rear Axle as the current ones run too loosely. | 8th Jan 1936 | Box 102 \ 4 scan0099 | |
| Manufacturing economies by sharing rear axle parts between the Phantom III and 25/30 models. | 22th Jan 1936 | Box 102 \ 4 scan0100 | |
| Cost reduction proposals for the 25-30 HP chassis, including a suggestion to use the Phantom III centre box on the rear axle. | 29th Jan 1936 | Box 102 \ 4 scan0101 | |
| Material change for the wheel driver on the 25/30 HP chassis rear hub. | 14th May 1937 | Box 102 \ 4 scan0102 | |
| Analysis of abnormal wear on a returned axle shaft's splines for Chassis B.4-MR. | 25th Aug 1939 | Box 102 \ 4 scan0103 | |
| The wear of a driving shaft and splines for an 'MR' Series rear axle. | 18th Aug 1939 | Box 102 \ 4 scan0104 | |
| The setting of the crown wheel and pinion for a Bentley rear axle. | 11th Aug 1939 | Box 102 \ 4 scan0105 | |
| Broken axle parts, specifically the locking plate and crown wheel, on a B.44.FB. | 22th Jun 1939 | Box 102 \ 4 scan0106 | |
| Inquiry regarding an axle failure on chassis B.44-FB, requesting the failed parts and more information. | 14th Jun 1939 | Box 102 \ 4 scan0107 | |
| History and assumed cause of a Bentley axle failure. | 9th Jun 1939 | Box 102 \ 4 scan0108 | |
| The bedding standards of a Bentley rear axle bevel wheel and pinion, with a suggested replacement plan. | 4th Mar 1939 | Box 102 \ 4 scan0109 | |
| Confirming the satisfactory trial of broaching equipment for Bentley hubs and arranging for its despatch. | 1st Mar 1939 | Box 102 \ 4 scan0110 | |
| Ordering and fitting special parts for a Bentley's double row roller for the pinion nose bearing. | 2nd Mar 1939 | Box 102 \ 4 scan0111 | |
| Fitment of new bearings to a Bentley rear axle. | 4th Oct 1938 | Box 102 \ 4 scan0112 | |
| The availability of broaches and tackle for correcting rear axle driving serrations. | 26th Jan 1939 | Box 102 \ 4 scan0113 | |
| The dispatch of specific parts for a Bentley Rear Axle. | 6th Jan 1939 | Box 102 \ 4 scan0114 | |
| Modification to the rear axle pinion bearing for Bentley 'J' to 'L' series cars. | 6th Jan 1939 | Box 102 \ 4 scan0115 | |
| Pinion modification for Bentley 'J' to 'L' Series rear axle gears. | 6th Jan 1939 | Box 102 \ 4 scan0116 | |
| Letter to a customer regarding a probable pinion bearing failure in the back axle. | 3rd Nov 1938 | Box 102 \ 4 scan0117 | |
| Producing an extra set of parts for a Bentley Rear Axle. | 25th Nov 1938 | Box 102 \ 4 scan0118 | |
| Requesting new parts for a Bentley Rear Axle double roller test. | 24th Nov 1938 | Box 102 \ 4 scan0119 | |
| The fitting of the latest thrust race on the Bentley Rear Axle for the 'M' series chassis. | 24th Nov 1938 | Box 102 \ 4 scan0120 | |
| The thrust race fitted to a B.40.MR Bentley rear axle following a bearing failure and oil leak. | 24th Nov 1938 | Box 102 \ 4 scan0121 | |
| The examination of a damaged pinion from the rear axle of chassis B.4.LS. | 25th Oct 1938 | Box 102 \ 4 scan0122 | |
| Faulty Bentley axle, detailing damage to the cage and pinion after dismantling. | 20th Oct 1938 | Box 102 \ 4 scan0123 | |
| Reclamation scheme and testing for scored Bentley II rear axle pinions. | 15th Jul 1938 | Box 102 \ 4 scan0124 | |
| Testing of a reclaimed Bentley II rear axle pinion and recommending its use on a customer's vehicle. | 18th Jul 1938 | Box 102 \ 4 scan0125 | |
| The testing of a reclaimed sample pinion for a Bentley rear axle. | 19th Jul 1938 | Box 102 \ 4 scan0126 | |
| Scheme for the modification and use of existing stock of bevel pinions. | 19th Jul 1938 | Box 102 \ 4 scan0127 | |
| Customer complaints of creaking from discs fitted to wire wheels by coachbuilders. | 25th Jun 1938 | Box 102 \ 4 scan0128 | |
| Knocking noise from a Bentley chassis axle shaft, explaining its cause and the manufacturing process. | 15th Jul 1938 | Box 102 \ 4 scan0129 | |
| Noisy rear axle and the return of a thrust race for examination. | 17th May 1938 | Box 102 \ 4 scan0130 | |
| Process for rebroaching and replacing Bentley hub serrations and brake drums. | 8th Apr 1938 | Box 102 \ 4 scan0131 | |
| Cost and process for fitting an over-sized broached hub for a Bentley, proposing a drawbroach solution. | 13th Apr 1938 | Box 102 \ 4 scan0132 | |
| Costs and logistics of repairing worn hub serrations. | 6th Apr 1938 | Box 102 \ 4 scan0133 | |
| Proposing to maintain a small floating stock of hubs with oversize serrations to manage wear. | 1st Apr 1938 | Box 102 \ 4 scan0134 | |
| The issue of worn hubs on high-mileage Bentley cars and a proposed solution. | 31th Mar 1938 | Box 102 \ 4 scan0135 | |
| Correcting a report on a preloaded pinion bearing failure for a 6.B.IV rear axle. | 21th Mar 1938 | Box 102 \ 4 scan0136 | |
| Complaint of a noisy axle on a Bentley vehicle, chassis B-185-DK. | 3rd Dec 1936 | Box 102 \ 4 scan0137 | |
| Complaint of a noisy axle on a Bentley, reporting a broken steel cage on the thrust bearing. | 2nd Dec 1936 | Box 102 \ 4 scan0138 | |
| Confirming the fitting of large wheels and tyres to Devereux's car, using parts from Lord Cholmondeley's house. | 31th Jan 1938 | Box 102 \ 4 scan0139 | |
| Request to fit and test a new Bentley back axle pinion bearing for 15,000 miles. | 28th Feb 1938 | Box 102 \ 4 scan0140 | |
| Damaged thrust races from Bentley Axles and crumpled suspension washers from a Phantom III. | 9th Feb 1938 | Box 102 \ 4 scan0141 | |
| Examination and proposed reconditioning of bearing races from a Bentley chassis. | 22th Jan 1938 | Box 102 \ 4 scan0142 | |
| Wheel drivers categorized by vehicle mileage and model series for 4.5-Litre and 3.5-Litre vehicles. | 18th Dec 1937 | Box 102 \ 4 scan0143 | |
| New, strengthened rear axle shafts for Bentley models and their chassis series application. | 18th Dec 1937 | Box 102 \ 4 scan0144 | |
| The service history of three Bentley rear axles fitted with special pinion bearings. | 30th Nov 1937 | Box 102 \ 4 scan0145 | |
| Attempts to quieten Bentley axle over-run noise at 40 M.P.H. | 26th Nov 1937 | Box 102 \ 4 scan0146 | |
| Preloading the pinion bearing to quiet over-run axle noise in Bentley axles at 40 M.P.H. | 23th Nov 1937 | Box 102 \ 4 scan0147 | |
| Issues with Chassis B.58-KT, specifically pinion tooth wear due to oil shortage and nose piece leakage from faulty workmanship. | 18th Nov 1937 | Box 102 \ 4 scan0148 | |
| Attempts to reduce overrun axle noise on Bentley vehicles by pre-loading the pinion bearing. | 16th Nov 1937 | Box 102 \ 4 scan0149 | |
| Notification regarding the modification of five thrust bearings (GB.2035) to include a preload. | 15th Nov 1937 | Box 102 \ 4 scan0150 | |
| Rear axle shaft failure on chassis B-70-EF at 29,356 miles. | 10th Nov 1937 | Box 102 \ 4 scan0151 | |
| Faulty axle with scored teeth from Chassis B-58-KT, investigating the cause of failure. | 8th Nov 1937 | Box 102 \ 4 scan0152 | |
| Experiments to resolve the failure of a Bentley rear axle roller bearing. | 2nd Nov 1937 | Box 102 \ 4 scan0153 | |
| Failure of a roller bearing integral with a Bentley rear axle bevel pinion. | 27th Oct 1937 | Box 102 \ 4 scan0154 | |
| The modification and inspection of thrust bearings for a Bentley rear axle. | 27th Oct 1937 | Box 102 \ 4 scan0155 | |
| Practice of hammering up splines on a Bentley Driving Dog to fix a rattle issue. | 29th Sep 1937 | Box 102 \ 4 scan0156 | |
| Broken thrust race in a Bentley rear axle thrust bearing for chassis B.155.CW. | 24th Sep 1937 | Box 102 \ 4 scan0157 | |
| Correcting a chart on Bentley Bearings and Crankshafts regarding an oil jet hole discrepancy. | 22th Sep 1937 | Box 102 \ 4 scan0158 | |
| The failure of a roller bearing integral with the rear axle bevel pinion on a Bentley chassis. | 22th Sep 1937 | Box 102 \ 4 scan0159 | |
| Damaged ball race and broken inner journal ring from a Bentley Chassis B-81-HM. | 15th Sep 1937 | Box 102 \ 4 scan0160 | |
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