| Description | Date | Identifier | |
| Agreeing to revert to the standard lower axle for open Bentleys. | 3rd Jan 1935 | Box 84 \ 4 scan0048 | |
| Standardisation of the lower geared axle for open Bentleys. | 25th Jan 1935 | Box 84 \ 4 scan0049 | |
| Necessity of a standardisation sheet for fitting a low geared axle to open Bentleys. | 28th Jan 1935 | Box 84 \ 4 scan0050 | |
| Seized rear axle gears from a Bentley chassis. | 27th Feb 1935 | Box 84 \ 4 scan0051 | |
| Dynamometer test report for a low geared Bentley rear axle with 10/43 gears. | 29th Mar 1935 | Box 84 \ 4 scan0052 | |
| Weight comparison between a V.8 Ford and a Bentley rear axle & prop. shaft. | 24th May 1935 | Box 84 \ 4 scan0053 | |
| Proposed dynamometer test on a Bentley rear axle to investigate potential failures. | 27th Jun 1935 | Box 84 \ 4 scan0054 | |
| Confirmation on the fitting and effectiveness of Perfect Circle oil seals on a rear axle. | 6th Aug 1935 | Box 84 \ 4 scan0055 | |
| Axle tube failure on Bentley Chassis B.152-AH, owned by the Prince of Siam, and the subsequent design changes. | 16th Aug 1935 | Box 84 \ 4 scan0056 | |
| Instructing the build-up of a Bentley rear axle with 14' drums for the experimental garage. | 19th Aug 1935 | Box 84 \ 4 scan0057 | |
| Modification to rear axle tubes for 6-B-IV cars due to customer failures. | 19th Aug 1935 | Box 84 \ 4 scan0058 | |
| Modifications to the stud (N.Sch.4601) for the Bentley Rear Axle. | 23th Aug 1935 | Box 84 \ 4 scan0059 | |
| Standardisation of Wakefield's Hi-Press oil for use in the Bentley rear axle. | 30th Aug 1935 | Box 84 \ 4 scan0060 | |
| Recommendation to use Hi-Press Oil for new Bentley rear axles due to pinion bearing failures caused by Whitmore's oil. | 3rd Sep 1935 | Box 84 \ 4 scan0061 | |
| Standardisation of parts document for a 7% lower rear axle ratio (10/43). | 12th Jul 1935 | Box 84 \ 4 scan0062 | |
| Cost estimate and production feasibility notes for the standardisation of Bentley parts. | 27th Jun 1935 | Box 84 \ 4 scan0063 | |
| Depot sheet memo regarding a breakage issue on Bentley axles and recommending inspection. | 6th Sep 1935 | Box 84 \ 4 scan0064 | |
| Procedure for inspecting and replacing Bentley rear axle tubes due to fatigue crack failures. | 7th Sep 1935 | Box 84 \ 4 scan0065 | |
| Extension of the hypoid pinion shaft for a Bentley Rear Axle. | 16th Sep 1935 | Box 84 \ 4 scan0066 | |
| Investigation into a complaint of low axle oil on a 3 1/2 litre Bentley B-38-EF. | 16th Sep 1936 | Box 84 \ 4 scan0067 | |
| Supply of two different types of strengthened stub axles for Bentley chassis to Paris. | 16th Sep 1935 | Box 84 \ 4 scan0068 | |
| Concerns over Bentley stub axles and the inability to fit replacements. | 17th Sep 1935 | Box 84 \ 4 scan0069 | |
| Seizure of gears on two Bentley rear axles due to oil shortages and leakage. | 17th Sep 1935 | Box 84 \ 4 scan0070 | |
| Seizure of gears on Bentley rear axles. | 20th Sep 1935 | Box 84 \ 4 scan0071 | |
| Lubrication scheme for the Bentley Rear Axle Pinion Thrust Race. | 21th Sep 1935 | Box 84 \ 4 scan0072 | |
| Customer complaints about oil loss from Bentley axles, suspecting incorrectly fitted seals. | 21th Sep 1935 | Box 84 \ 4 scan0073 | |
| Investigation into bearing failures on the Bentley rear axle pinion thrust race and proposed solutions. | 21th Sep 1935 | Box 84 \ 4 scan0074 | |
| Requesting the removal and replacement of a centre box from a rear axle to use its gears for dynamometer tests. | 24th Sep 1935 | Box 84 \ 4 scan0075 | |
| Investigation into the loss of oil from a rear axle box on a Bentley, questioning the reliability of the 'Perfect' oil seal being used. | 25th Sep 1935 | Box 84 \ 4 scan0076 | |
| Responding to a query about oil leaks from Bentley axles, requesting a blueprint for an oil seal. | 24th Sep 1935 | Box 84 \ 4 scan0077 | |
| Reinstatement of the lubrication scheme for the Bentley Rear Axle Pinion Thrust Race. | 24th Sep 1935 | Box 84 \ 4 scan0078 | |
| Failure of a 'Perfect' oil seal causing a loss of oil from the rear axle box on a Bentley B.169-DK. | 25th Sep 1935 | Box 84 \ 4 scan0079 | |
| Letter discussing an axle oil leak on Chassis B.169-DK, the potential failure of a leather oil seal, and enclosing a blueprint. | 25th Sep 1935 | Box 84 \ 4 scan0080 | |
| Shipment of forgotten Bentley axle seals to Paris. | 9th Oct 1935 | Box 84 \ 4 scan0081 | |
| The failure of rear axle gears and oil shortage for chassis B.38.EF. | 11th Oct 1935 | Box 84 \ 4 scan0082 | |
| Failure of rear axle gears for chassis B-38-EF and B-169-DK. | 15th Oct 1935 | Box 84 \ 4 scan0083 | |
| The change of taper on the Bentley Rear Axle Pinion to increase torque transmission. | 22th Oct 1935 | Box 84 \ 4 scan0084 | |
| Rear axle drain plugs being found loose, attributing the issue to the use of large portable jacks and proposing a modification. | 19th Feb 1936 | Box 84 \ 4 scan0085 | |
| Production failure on a Bentley rear axle, detailing the required modifications for car B-56-BN. | 24th Feb 1936 | Box 84 \ 4 scan0086 | |
| Request for deflection tests on a modified Bentley rear axle pinion assembly before fitting it to a car. | 14th Mar 1936 | Box 84 \ 4 scan0087 | |
| Request to produce a Bentley rear axle centre box in cast-iron instead of aluminium for dynamometer testing. | 28th Mar 1936 | Box 84 \ 4 scan0088 | |
| The failure of a 'Perfect' oil seal on a Bentley rear axle, referencing previous correspondence. | 29th May 1936 | Box 84 \ 4 scan0089 | |
| Loose nuts on a Bentley rear axle during a 10,000-mile test and recommending a fix using grover washers. | 17th Jun 1936 | Box 84 \ 4 scan0090 | |
| Oil leaks on Bentley rear axles, discussing seal failures and production changes to washers. | 1st Jul 1936 | Box 84 \ 4 scan0091 | |
| Wear on the Bentley rear axle bevel pinion bearing and a proposal for an increased capacity replacement. | 8th Jul 1936 | Box 84 \ 4 scan0092 | |
| The testing of oil seals for Bentley axles. | 5th Aug 1936 | Box 84 \ 4 scan0093 | |
| Discussion and proposal for ordering improved oil seals from George Angus & Co. for testing. | 12th Aug 1936 | Box 84 \ 4 scan0094 | |
| Replacing asbestos and tallow gaskets with new moulded 'Gaco' seals for pump work. | 12th Aug 1936 | Box 84 \ 4 scan0095 | |
| Letter from George Angus & Co Ltd discussing the properties and applications of their 'Angus Oil Seals' and 'Gaco' material. | 13th Aug 1936 | Box 84 \ 4 scan0096 | |
| Letter from George Angus & Co. Ltd. discussing rubberised leather gaiters, protectors, and oil seals. | 5th Sep 1936 | Box 84 \ 4 scan0097 | |
| Modifications to the Bentley back axle, including a new hub and an oil-retaining cap. | 5th Sep 1936 | Box 84 \ 4 scan0098 | |
| Letter confirming 'Perfect' oil seals have been sourced and will be fitted to Bentley Trials cars for testing. | 8th Sep 1936 | Box 84 \ 4 scan0099 | |
| Standardisation of parts for a rear axle pinion with an inner race of nose bearing integral with the pinion. | 24th Aug 1936 | Box 84 \ 4 scan0100 | |
| Estimated cost for extra Jigs, Tools, and Equipment for 'J' Series chassis production. | 17th Jul 1936 | Box 84 \ 4 scan0101 | |
| Inquiry into failures of rear axle half-shafts on older models of Bentley cars. | 16th Sep 1936 | Box 84 \ 4 scan0102 | |
| Difference of opinion with supplier Super Oil Seals Limited regarding responsibility for oil seals. | 19th Sep 1936 | Box 84 \ 4 scan0103 | |
| Letter from Super Oil Seals Limited investigating the failure of oil seals due to being fitted on shafts larger than their specified diameter. | 17th Sep 1936 | Box 84 \ 4 scan0104 | |
| Letter from Super Oil Seals Limited regarding a dispute over the incorrect supply, delivery, and performance of various oil seals. | 17th Sep 1936 | Box 84 \ 4 scan0105 | |
| Analysis of failures and design history for three types of rear axle road shafts used in old type Bentley cars. | 17th Sep 1936 | Box 84 \ 4 scan0106 | |
| Detailed analysis of historical hub, axle, and bearing design issues and their solutions. | 17th Sep 1936 | Box 84 \ 4 scan0107 | |
| Differential failures and wear on the ends of road shafts. | 25th Sep 1936 | Box 84 \ 4 scan0108 | |
| Letter from George Angus & Co. Ltd. regarding the supply of 'Gaco' oil seals for testing. | 25th Sep 1936 | Box 84 \ 4 scan0109 | |
| Failures of Bentley rear axle gears due to faulty oil seals and a follow-up on testing new seals. | 7th Oct 1936 | Box 84 \ 4 scan0110 | |
| Deflection test results for the rear axle half shafts of the Phantom III and Bentley models. | 10th Oct 1936 | Box 84 \ 4 scan0111 | |
| Experiment on an axle shaft and proposing a new design for short drivers. | 10th Oct 1936 | Box 84 \ 4 scan0112 | |
| Holding letter to Bentley Motors Ltd. regarding a Bentley Rear Axle. | 13th Oct 1936 | Box 84 \ 4 scan0113 | |
| Fitting of special oil seals to Bentley rear axles to address oil leakage issues. | 16th Oct 1936 | Box 84 \ 4 scan0114 | |
| Failures of the Bentley rear axle pinion nose and suggesting expediting a strengthened replacement part. | 31th Oct 1936 | Box 84 \ 4 scan0115 | |
| The failure of a pinion nose on the Bentley rear axle and the introduction of a new strengthened pinion. | 3rd Nov 1936 | Box 84 \ 4 scan0116 | |
| Request for three additional sets of increased capacity Bentley Pinion Bearings for fitting to Trials cars. | 5th Nov 1936 | Box 84 \ 4 scan0117 | |
| Instructions to introduce a strengthened pinion for the Bentley Chassis rear axle. | 5th Nov 1936 | Box 84 \ 4 scan0118 | |
| Customer's Bentley rear axle shaft failure due to a faulty radius. | 13th Nov 1936 | Box 84 \ 4 scan0119 | |
| Investigation into a 'wheel driver knock' issue on the 4 1/4-litre Bentley, focusing on splining and wear problems. | 13th Nov 1936 | Box 84 \ 4 scan0120 | |
| Modifications to the driver dog and splines to reduce wear and address a knocking issue. | 13th Nov 1936 | Box 84 \ 4 scan0121 | |
| Typed table comparing wheel driver data for 4 1/2-Litre and 3 1/2-Litre models by mileage. | 13th Nov 1936 | Box 84 \ 4 scan0122 | |
| Cross-sectional drawing with annotations detailing suggested modifications to strengthen the driving dogs of a rear hub. | 13th Nov 1936 | Box 84 \ 4 scan0123 | |
| Request to obtain dural stampings for the rear axle to reduce its weight. | 13th Nov 1936 | Box 84 \ 4 scan0124 | |
| Wheel driver wobble, rear axle deflection tests, and proposed improvements involving new drivers and modified hubs. | 17th Nov 1936 | Box 84 \ 4 scan0125 | |
| Proposed alterations for the Bentley rear axle based on experimental data from a 15,000-mile test. | 18th Nov 1936 | Box 84 \ 4 scan0126 | |
| Instruction to swap a rear axle between two vehicles to test an extended pinion arrangement. | 25th Nov 1936 | Box 84 \ 4 scan0127 | |
| Proposal to alter the Bentley 25/30 & Ph.111 rear axle by incorporating multiple parts into a single forging. | 26th Nov 1936 | Box 84 \ 4 scan0128 | |
| Comparison of existing and suggested schemes for L.H. end plates for a rear axle. | 27th Nov 1936 | Box 84 \ 4 scan0129 | |
| Request to manufacture a new rear axle for a Bentley to test various stiffnesses. | 3rd Dec 1936 | Box 84 \ 4 scan0130 | |
| Modifications to the Bentley Back Axle and associated components like the pinion shaft and thrust bearing. | 8th Dec 1936 | Box 84 \ 4 scan0131 | |
| Confirming the 35° thrust angle for Phantom 111 & Bentley bevel pinion thrust bearings. | 24th Dec 1936 | Box 84 \ 4 scan0132 | |
| Proposed improvement for lubricating the Bentley rear axle pinion thrust bearing. | 24th Dec 1936 | Box 84 \ 4 scan0133 | |
| Instruction to have the rear axle removed and the frame examined before removing the body. | 29th Dec 1936 | Box 84 \ 4 scan0134 | |
| Sending parts for a Bentley rear axle to France and manufacturing options for an oil seal cover. | 29th Dec 1936 | Box 84 \ 4 scan0135 | |
| Potential damage to axle casings from jacks and the causes of noisy axles. | 29th Dec 1936 | Box 84 \ 4 scan0136 | |
| Urging for parts for destruction testing on Bentley rear axle wheel drivers. | 1st Jan 1937 | Box 84 \ 4 scan0137 | |
| Instruction to replace fouled axle gears with standard parts, except for a special bearing, requiring a new centre case. | 19th Jan 1937 | Box 84 \ 4 scan0138 | |
| Repeated failures of cages in the Bentley rear axle pinion thrust bearing, seeking a customer's car for testing. | 22th Jan 1937 | Box 84 \ 4 scan0139 | |
| Correspondence regarding a broken bearing race in a Bentley rear axle and returning the unit for examination. | 23th Jan 1937 | Box 84 \ 4 scan0140 | |
| Simplified brake system for the Bentley rear axle, proposing cheaper axle tubes and lighter hubs. | 29th Jan 1937 | Box 84 \ 4 scan0141 | |
| The despatch of Bentley Rear Axle parts for a Trials Car. | 29th Jan 1937 | Box 84 \ 4 scan0142 | |
| Dispatch and testing of increased capacity pinion bearing parts for a Bentley rear axle. | 29th Jan 1937 | Box 84 \ 4 scan0143 | |
| Recommendation to address oil leaks and broken bolts on the Bentley rear axle by increasing bolt size. | 4th Feb 1937 | Box 84 \ 4 scan0144 | |
| Chasing progress on a modified lubrication scheme for a Pinion Thrust, inquiring about the status of parts. | 12th Mar 1937 | Box 84 \ 4 scan0145 | |
| Series of questions regarding oil leaks from the Bentley rear axle. | 13th Feb 1937 | Box 84 \ 4 scan0146 | |
| Technical query and response regarding oil leaks in the Bentley rear axle. | 16th Feb 1937 | Box 84 \ 4 scan0147 | |
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