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).
Table listing the weights of various 1937 Buick parts across different series models.
| Identifier | ExFiles\Box 83\3\ scan0030 | |
| Date | 24th March 1937 | |
| 200 COPY. 1937 BUICK WEIGHTS. March 24th, 1937. WEIGHT IN POUNDS. PART. Series "40" Series "60" Series "80" Series "90" Engine - (Less clutch and oil, includes manifold.) 705 836 836 836 Exhaust Manifold 17½ 18¾ 18¾ 18¾ Transmission Assembly (Includes rear bearing retainer, universal joint, universal joint ball and retainer, and shift lever) 76½ 91 91 91 Rear Springs (Less covers) - each 38 38 45½ 56½ Rear Spring Rate (Test machine lbs per inch deflection) 128 128 135 145 Rear Axle Assembly (Less brake drums, includes brakes) 220 226½ 240 274½ Where both systems use the same type of emergency brake hook-up, the hydraulic brake hook-up saves same weight over the mechanical brake hook-up. It saves considerable weight over the vacuum booster system. Clutch Wt. Olds. 16.00 lbs. | ||