FOUR SPEED TRANSMISSION 7 II INDEX Page Page General Description 7 12 Side Cover 7 12 Mainshaft Assembly 7 12 Disassembly 7 12 Reverse Idler Gear Parts 7 12 Assembly 7 12 Cover Assembly 7 12 Gearshift Control Assembly Shift Linkage Case 7 12 Adjustment Transmission Miscellaneous 7 12 Removal See 3 Speed Section Tools 7 12 Torque Specifications 7 15 Maintenance and Adjustments 7 12 Special Tools 7 15 I 2 3 4 5 6 7 8910 II I2 I3 I4 I5I6I7I8I9 20 I I I I In In I I S 2I is I1 7 E Ii I I I fl W if Q IAI I V V i ryw V VV I i i I g I It Tri it r7l y ilililr IIIII 5 I A TI II Il I I 2 M i 1 1 IIII i I I e g II I r 1 I 1 1 W V r y gf I I I t I i I I 39 Q W II i i 26 I Z TQ T L Z V rx V 7 rr x r A 25 I FIAFIV I 1 aI A Q 1 I Q j 1I Q Nasa if fx n r Q i1 F I 5 3 ri 1 gl f h f rg Iss 37 3 V T g I p 7 I g u An I 5 L N g IFj I l I if 36 rrr 1 I il 29 T 35 IN I II il l U 1 II e I I g I 35 I A I f F 7 i I I II I 32 ISII I I i I I I II I I e e e I srsei 1 i I II I III II 33 I I II MII 7 I W g 4 Vi REVERSE INHIBITOR Fig IB Four Speed Transmission Cross Section I Bearing Retainer I2 Second Speed Gear 2l Retainer Strap 30 Reverse Idler Gear Sliding 2 Snap Ring Bearing to I3 2nd Speed Blocker Ring 22 Snap Ring Rear Bearing to 3I Woodruff Key Gear I4 I 2 Speed Synch Hub Retainer 32 Selector Shaft 3 Snap Ring Bearing to Case I5 l 2 Speed Synch Sleeve 8 23 Rear Bearing 33 Welsh Plug 4 Clutch Gear Bearing Reverse Gear 24 Snap Ring Bearing to 34 Oil Seal 5 Clutch Gear I6 Snap Ring I 2 Speed Mainshaft 35 Shift Finger 6 4th Speed Blocker Ring Synch 25 Synchronizer Key 36 Countergear 7 Snap Ring 3 4 Synch I7 First Speed Blocker Ring 26 Countershaft Roller 37 Front Thrust Washer 8 3 4 Synch Hub I8 Reverse Gear Bearings 38 Anti Rattle Plate Rivet 9 3 4 Synch Sleeve I9 Reverse Gear Thrust 27 Counter Shaft Assembly IO 3rd Speed Blocker Ring Spring Washers 28 Rear Thrust Washer 39 Mainshaft Pilot Bearings II Third Speed Gear 20 Rear Bearing Retainer 29 Reverse Idler Shaft 40 Snap Ring CORVAIR SHOP MANUAL SUPPLEMENT