THREE SPEED TRANSMISSION 7 5 REPAIRS NOTE A groove around the outside of the CI h K d synchronizer hub identifies the end that must be UC eys un Sprmgs opposite the fork slot in the sleeve when as NOTE The clutch hubs and sliding sleeves are sembled This groove indicates the end of the a selected assembly and should be kept together hub with a O 7 greater recess depth as originally assembled but the keys and two springs may be replaced if worn or broken MAINSHAFT Assembly Fig 6A Replacement Turn the front of the mainshaft upward Install the l Mark hub and sleeve so they can be matched upon following components on the mainshaft reassembly 1 Install the second speed gear with clutching teeth 2 Push the hub from the sliding sleeve the keys and upward the rear face of the gear will butt against the springs may be easily removed the flange on the mainshaft 3 Place the three keys and two springs in position one 2 Install a blocking ring with clutching teeth downward on each side of hub so all three keys are engaged over the synchronizing surface of the second speed by both springs The tanged end of each synchronizer gear All three blocker rings used in this trans spring should be installed into different key cavities mission are identical on either side Slide the sleeve onto the hub aligning 3 Install the second and third synchronizer assembly the marks made before disassembly with the fork slot downward press it onto splines on j 2 QQ R Q I I I I I1111ZZ1Y1Y1 IKKZXIKXKZZ11111YJ I I I I Q ii V Kg I s NQ fm Q P ll f lg Ezr I ei S f i t e R Y i i J I Q Ti V r V Q e g si i i g S S er t I r E 1 n I j Z I S Uh F 5 5 a V fx L S V F f M c i g Q xy gl S 3 4 5 6 7 8 9 10 ll I2 I3 I4 I5 I6 IZ Fig 6A Clutch Gear Mainshaft Assembly Exploded l Clutch Gear 5 2 3 Synchronizer Assembly IO lst Speed Synchronizer l4 Spring Washer 2 Mainshctt Pilot 6 2nd Speed Blocker Ring Assembly l5 Rear Bearing Bearings 76 7 2nd Speed Gear ll Snap Ring l Rear Bearing Retainer Sn p 3 3rd Speed Blocker Ring 8 lst Speed Gear l2 Reverse Gear Ring 4 Snap Ring 9 lst Speed Blocker Ring I3 Reverse Gear Thrust Washer l7 Snap Ring CORVAIR SHOP MANUAL SUPPLEMENT