| Description | Date | Identifier | |
| Table listing the weights of various components for 1937 Buick Series '40', '60', '80', and '90' models. | 24th Mar 1937 | Box 114 \ 1 scan0109 | |
| Cost-saving design change to the Wraith stub axles by removing holes. | 7th Jul 1937 | Box 114 \ 1 scan0110 | |
| Proposing the standardization of wheel driver and half shaft serrations for Wraith and Bentley models. | 28th Aug 1937 | Box 114 \ 1 scan0111 | |
| Standardizing wheel driver and axle shaft serrations for various Bentley and Wraith models. | 31th Aug 1937 | Box 114 \ 1 scan0112 | |
| Replacing bronze washers with steel ones in rear axles due to lubricant corrosion. | 8th Sep 1937 | Box 114 \ 1 scan0113 | |
| Letter detailing the heat treatment process for an S.82 axle shaft. | 17th Sep 1937 | Box 114 \ 1 scan0114 | |
| Fitting two pairs of differential bearings with steel cages for running on Hypoid oil. | 10th Dec 1937 | Box 114 \ 1 scan0115 | |
| Half shaft spline failures and design variations from E.R.A. | 16th Dec 1937 | Box 114 \ 1 scan0116 | |
| Blueprint illustrating three different designs for E.R.A. Axle Half Shafts. | 21th Dec 1937 | Box 114 \ 1 scan0117 | |
| Letter to S.S. Cars Ltd. enquiring about semi-floating axles and the cause of half-shaft failure. | 21th Dec 1937 | Box 114 \ 1 scan0118 | |
| Comparing major stresses on semi-floating axles for various car models. | 22th Dec 1937 | Box 114 \ 1 scan0119 | |
| Inquiry to The Graham-Paige Corporation regarding their rear axle and shaft design. | 22th Dec 1937 | Box 114 \ 1 scan0120 | |
| The axle shaft diameter for the B.50 and Wraith half floating rear axle. | 29th Dec 1937 | Box 114 \ 1 scan0121 | |
| Rear axle driving dog rattle on Ph.III, 25/30 HP, Ph.II, and 20/25 HP models. | 12th Jan 1938 | Box 114 \ 1 scan0122 | |
| The replacement of bronze differential thrust washers with A.C.1. material for rear axles. | 26th Mar 1938 | Box 114 \ 1 scan0123 | |
| Rig testing and analysis of a cracked Cadillac axle shaft for comparison with a semi-floating axle shaft. | 31th Mar 1938 | Box 114 \ 1 scan0124 | |
| Laboratory analysis of a Cadillac axle shaft detailing its chemical composition and hardness. | 14th Apr 1938 | Box 114 \ 1 scan0125 | |
| Laboratory analysis report on the material composition of an Oldsmobile halfshaft. | 14th Apr 1938 | Box 114 \ 1 scan0126 | |
| Laboratory analysis of drillings from an Oldsmobile rear axle half shaft. | 20th Apr 1938 | Box 114 \ 1 scan0127 | |
| Dimensioned drawing and material analysis for an Oldsmobile Half Shaft. | 4th May 1938 | Box 114 \ 1 scan0128 | |
| Design and materials for semi-floating rear axles, comparing American and British practices. | 4th May 1938 | Box 114 \ 1 scan0129 | |
| Modifications to the rear axle shafts and bevel wheels for B.50 and B.111 models. | 11th May 1938 | Box 114 \ 1 scan0130 | |
| Letter from Hardy Spicer & Co. following up on an inquiry about Salisbury Rear Axles and sending a print for a Model 52 axle. | 11th May 1938 | Box 114 \ 1 scan0131 | |
| Letter from the Experimental Dept. requesting a quotation for 2,000 rear axle shaft forgings. | 24th May 1938 | Box 114 \ 1 scan0132 | |
| Letter requesting a quotation for 2,000 rear axle shaft forgings. | 24th May 1938 | Box 114 \ 1 scan0133 | |
| Letter from the Experimental Department requesting a quotation for rear axle shaft forgings. | 24th May 1938 | Box 114 \ 1 scan0134 | |
| Request for a quotation for 2,000 rear axle shaft forgings from The Park Drop Forge Co. | 24th May 1938 | Box 114 \ 1 scan0135 | |
| Findings on semi-floating rear axles following a visit to Rover. | 25th May 1938 | Box 114 \ 1 scan0136 | |
| Use of pressed-on collars for axle shaft location on a semi-floating rear axle. | 26th May 1938 | Box 114 \ 1 scan0137 | |
| Cover memo for correspondence regarding banjo axle construction. | 30th May 1938 | Box 114 \ 1 scan0138 | |
| Issues with the Wraith and Ph.III transmission and proposing a modification to the B.50 axle. | 30th May 1938 | Box 114 \ 1 scan0139 | |
| Modification to the Pinion Coupling piece and centre casing for the semi-floating rear axle. | 13th Jun 1938 | Box 114 \ 1 scan0140 | |
| Fitting of bearing retaining collars on a semi-floating rear axle, considering the necessity of a Belleville washer. | 18th Jun 1938 | Box 114 \ 1 scan0141 | |
| Blueprints for new Front Axle Yokes for the Bentley III and Bentley 50 models. | 5th Jul 1938 | Box 114 \ 1 scan0142 | |
| Available axle ratios and tyre sizes for new cars, including Bentley and proposed models. | 19th Jul 1938 | Box 114 \ 1 scan0143 | |
| Recommending the purchase of six more sets of 9/37 axle gears from the supplier Gleasons. | 20th Jul 1938 | Box 114 \ 1 scan0144 | |
| Material changes for rear axle differential washers and bushes due to corrosion from new hypoid oils. | 12th Aug 1938 | Box 114 \ 1 scan0145 | |
| Preliminary report on the design, testing, and issues found with a new semi-floating axle. | 19th Aug 1938 | Box 114 \ 1 scan0146 | |
| Analysis of axle and gear failures and outlining future testing plans. | 19th Aug 1938 | Box 114 \ 1 scan0147 | |
| Requesting the stripping and rebuilding of a semi-floating dynamometer axle after testing. | 24th Aug 1938 | Box 114 \ 1 scan0148 | |
| Surface failure of gear teeth on a semi-floating axle and requesting hardness testing. | 10th Sep 1938 | Box 114 \ 1 scan0149 | |
| Analysis of the effects of increasing hypoid in the semi-floating rear axle on the coachwork of B.III, B.50, and Wraith 80 models. | 15th Sep 1938 | Box 114 \ 1 scan0150 | |
| General remarks comparing the benefits of an intermediate propeller shaft bearing versus hypoid gearing in various car models. | 15th Sep 1938 | Box 114 \ 1 scan0151 | |
| Blueprint diagram showing the top level and cross section of the Wraith 80 frame. | 14th Sep 1938 | Box 114 \ 1 scan0152 | |
| Blueprint showing a profile view of a Wraith 80 chassis frame. | 16th Sep 1938 | Box 114 \ 1 scan0153 | |
| Request to fit a new pair of 8/37 gears to a dynamometer semi-floating rear axle due to suspected oil issues causing scoring. | 21th Sep 1938 | Box 114 \ 1 scan0154 | |
| Dynamometer test of a semi-floating axle, discussing component wear and lubricant performance. | 22th Sep 1938 | Box 114 \ 1 scan0155 | |
| Updated specifications for semi-floating axles following dynamometer testing. | 27th Sep 1938 | Box 114 \ 1 scan0156 | |
| Comparing the pros and cons of semi-floating axles versus fully floating axles. | 29th Sep 1938 | Box 114 \ 1 scan0157 | |
| Weight analysis comparing semi-floating and fully-floating axles with pressed steel and wire wheels. | 29th Sep 1938 | Box 114 \ 1 scan0158 | |
| Rear axle specifications and suggestions for various car models. | 7th Oct 1938 | Box 114 \ 1 scan0159 | |
| Semi-floating version of the Wraith 10' axle and propeller shaft requirements. | 7th Oct 1938 | Box 114 \ 1 scan0160 | |
| Rear axle crown wheel and reduction ratio specifications for various engines. | 13th Oct 1938 | Box 114 \ 1 scan0161 | |
| Requesting a new rig for fatigue testing four semi-floating axle half shafts at once. | 3rd Nov 1938 | Box 114 \ 1 scan0162 | |
| The dynamometer testing of axle gears for an 8-cylinder car. | 4th Nov 1938 | Box 114 \ 1 scan0163 | |
| Request for a semi-floating axle assembly to test if jacking causes the bridge piece to misalign. | 15th Nov 1938 | Box 114 \ 1 scan0164 | |
| Requesting a drawing for a semi-floating axle for the 'Lagonda Chaser' (B.50) model. | 22th Dec 1938 | Box 114 \ 1 scan0165 | |
| Correction notice for the axle shaft oil seal part number on the 65I Offset Hypoid Semi-floating Rear Axle. | 2nd Jan 1939 | Box 114 \ 1 scan0166 | |
| Required ratios for the .650 Hypoid Semi Floating Axle for various models. | 18th Jan 1939 | Box 114 \ 1 scan0167 | |
| Request to the laboratory to test the effect of GX oil on different types of bronze and steel components. | 14th Feb 1939 | Box 114 \ 1 scan0168 | |
| Comparative analysis table of rear axle half shafts for various car models. | 22th Feb 1939 | Box 114 \ 1 scan0169 | |
| The standardization of rear axles to two specific types to reduce variations and simplify the design. | 8th Mar 1939 | Box 114 \ 1 scan0170 | |
| Modifications to secure axle tube nuts to prevent oil leaks on a new axle design. | 8th Mar 1939 | Box 114 \ 1 scan0171 | |
| Blueprint showing a cross-section of a simplified crown wheel mounting. | 9th Mar 1939 | Box 114 \ 1 scan0172 | |
| The oil seals, wheel bearing grease, and air vent hole requirements for rear axles PD.312. | 9th Mar 1939 | Box 114 \ 1 scan0173 | |
| Particulars of ratios and tracks for the new semi-floating axle PD.312. | 9th Mar 1939 | Box 114 \ 1 scan0174 | |
| Technical memorandum discussing two methods for axle oil retention and an analysis of current seal failures. | 10th Mar 1939 | Box 114 \ 1 scan0175 | |
| The performance, reliability, and further testing of the semi-floating axle. | 13th Mar 1939 | Box 114 \ 1 scan0176 | |
| Test results and design considerations for axles and wheels. | 13th Mar 1939 | Box 114 \ 1 scan0177 | |
| Experimental car testing, component reliability, and market competition. | 13th Mar 1939 | Box 114 \ 1 scan0178 | |
| Correcting a previously stated torque figure and figure of merit for the 8-cylinder engine. | 15th Mar 1939 | Box 114 \ 1 scan0179 | |
| Observations and calculations regarding a proposal for the simplification of a semi-floating rear axle. | 16th Mar 1939 | Box 114 \ 1 scan0180 | |
| Continuation of a discussion on axle and bearing design, covering gear backlash, bearing types, and material choices. | 16th Mar 1939 | Box 114 \ 1 scan0181 | |
| List of lubricants that have passed the mechanical running test of a rear axle drive with hypoid gears. | 16th Mar 1939 | Box 114 \ 1 scan0182 | |
| List of approved lubricants, their marketers, and addresses (continued page). | 16th Mar 1939 | Box 114 \ 1 scan0183 | |
| List of approved lubricants, their marketers, and addresses (Continued). | 22th Feb 1939 | Box 114 \ 1 scan0184 | |
| Continuation of a list of approved lubricants, detailing the test specifications for axles. | 22th Feb 1939 | Box 114 \ 1 scan0185 | |
| Laboratory report detailing corrosion tests of four different 'high pressure' axle oils on various metal specimens. | 31th Mar 1939 | Box 114 \ 1 scan0186 | |
| Chemical analysis and comparison of lubricating oils, focusing on sulphur and chlorine content and their corrosive properties. | 31th Mar 1939 | Box 114 \ 1 scan0187 | |
| Analysis and comparison of four different oils based on their chemical properties and corrosive potential. | 31th Mar 1939 | Box 114 \ 1 scan0188 | |
| The results of corrosion tests on various metals immersed in different types of oil. | 31th Mar 1939 | Box 114 \ 1 scan0189 | |
| The appearance of deposits on test specimens after corrosion tests. | 3rd Apr 1939 | Box 114 \ 1 scan0190 | |
| Confirming a request to arrange a trial for a non-straddle mounted pinion in a PD.312 rear axle. | 3rd Apr 1939 | Box 114 \ 1 scan0191 | |
| Axle ratio decisions for 'B.V.' and 'Ripple' models. | 6th Apr 1939 | Box 114 \ 1 scan0192 | |
| Specifying the required grade for half shaft bearings on a semi-floating rear axle. | 12th Apr 1939 | Box 114 \ 1 scan0193 | |
| Testing of a double oil seal for a Phantom III axle. | 25th Apr 1939 | Box 114 \ 1 scan0194 | |
| Requesting the examination of rear axle oil seals for quality, workmanship, and fit. | 26th Apr 1939 | Box 114 \ 1 scan0195 | |
| Copy of an experimental order placed with British Oil Seals Ltd for various seals. | 14th Apr 1939 | Box 114 \ 1 scan0196 | |
| Rejecting a suggested alternative supplier for oil seals due to quality concerns. | 27th Apr 1939 | Box 114 \ 1 scan0197 | |
| Rig test for a scheme to prevent the drying up of oil seals. | 1st May 1939 | Box 114 \ 1 scan0198 | |
| Letter to British Timken Ltd. regarding an experimental rear axle bearing and a request for two mirror-finish bearings. | 4th May 1939 | Box 114 \ 1 scan0199 | |
| Letter from British Timken clarifying bearing specifications for a rear axle experiment. | 5th May 1939 | Box 114 \ 1 scan0200 | |
| Parts list for a non-straddle mounted pinion rear axle modification on a Bentley 111 & 50 chassis. | 9th May 1939 | Box 114 \ 1 scan0201 | |
| Rear axle parts required for a conference. | 10th May 1939 | Box 114 \ 1 scan0202 | |
| Parts list for various vehicle configurations, including Continental, Rear Brakes, and different gear sets. | 10th May 1939 | Box 114 \ 1 scan0203 | |
| Letter to Hoffmann Manufacturing Co. Ltd. requesting experimental bearings and data on bearing deflection under load. | 12th May 1939 | Box 114 \ 1 scan0204 | |
| Request for a covering order for two R.345.LL type bearings for experimental purposes. | 12th May 1939 | Box 114 \ 1 scan0205 | |
| Details for fitting rear axle rebound straps to two chassis. | 12th May 1939 | Box 114 \ 1 scan0206 | |
| Letter to British Timken Ltd. regarding a burst outer race on a bearing used in an experimental rear axle. | 1st Jun 1939 | Box 114 \ 1 scan0207 | |
| Letter from a bearing manufacturer regarding the axial deflection and end movement of a ball journal bearing under various loads. | 2nd Jun 1939 | Box 114 \ 1 scan0208 | |
| | | | |