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).
Transmission disassembly instructions and a speedometer pinion selection chart.
| Identifier | ExFiles\Box 178\4\ img031 | |
| Date | 20th April 1932 guessed | |
| Preliminary Service Information 51 moved equal distances and should be located in exactly the same position as indicated by the graduation marks. Adjust the travel of the front yoke by moving the front quadrants in the same manner as the rear quadrants, moving them up to decrease the yoke travel and down to increase its travel. The removal of the transmission from the engine is similar to that on the "A" series Cadillac cars. The transmission has the additional support at the rear, which must be disconnected before the transmission can be removed. The clutch control valve must also be disconnected from the power cylinder to remove the pedal assembly. The method of disassembling the transmission is different from that previously employed in that the universal joint must first be removed and the main shaft taken out through the top of the transmission housing. Disassemble the transmission as follows: 1. Drain the transmission and remove the cover. 2. Remove the synchronizing yokes and the yoke stop. 3. Remove ball socket and universal joint, using special wrench (Tool No. HM{Capt. W. Hallam - Head Repairs}109217) and puller (Tool No. HM{Capt. W. Hallam - Head Repairs}109416-12). 4. Remove universal joint housing and counter-shaft rear bearing washer. 5. Remove capscrew in rear end of countershaft. 6. Remove clutch release yoke, bearing and oil tube. 7. Remove clutch connection bearing cap (thin head capscrews). 8. Remove snap ring from clutch connection bearing. Fig. 97. Exploded view of transmission synchronizing mechanism Diagram Labels: Second Speed Synchronizing Yoke Synchronizing Yoke Stop Yoke Return Spring High Speed Synchronizing Yoke High Speed Synchronizing Drum Second Speed Gear Second Speed Synchronizing Drum SPEEDOMETER PINION CHART Car Model | Gear Rates | Number of Teeth on Pinion | Part Number | Rolling Radius 452-B (7.50 x 18 in. Tires) | 4.31 to 1 | 19 | 848178 | {15 5/8 to 15 7/8 in. (Fast), 15 7/8 in., 15 7/8 to 16 1/8 in. (Slow)} 345-B, 355-B (7.00 x 17 in. Tires) | 4.36 to 1 | 20 | 848122 | {14 3/4 to 15 1/4 in. (Fast), 15 1/4 in., 15 1/4 to 15 1/2 in. (Slow)} 345-B, 355-B (7.00 x 17 in. Tires) | 4.60 to 1 | 22 | 848124 | {14 1/4 to 14 5/8 in. (Fast), 14 5/8 in., 14 5/8 to 14 7/8 in. (Slow)} 370-B (7.50 x 17 in. Tires) | 4.60 to 1 | 21 | 848123 | {14 7/8 to 15 3/8 in. (Fast), 15 3/8 in., 15 3/8 to 15 5/8 in. (Slow)} 452-B (7.50 x 18 in. Tires) | 4.64 to 1 | 20 | 848122 | {15 3/4 to 16 1/4 in. (Fast), 16 1/4 in., 16 1/4 to 16 1/2 in. (Slow)} 370-B (7.50 x 17 in. Tires) | 4.80 to 1 | 22 | 848124 | {14 7/8 to 15 1/4 in. (Fast), 15 1/4 in., 15 1/4 to 15 1/2 in. (Slow)} | ||