Page 1585 of 2158
(26) On AX 5, install assembled gear and synchro-
nizer on counter shaft (Fig. 63).
(27) Install remaining synchronizer ring and spline
fifth gear (Fig. 64). Use length of pipe to tap gear
into place.
(28) Shift 1-2 and 3-4 synchronizer sleeves into
gear to lock output shaft and counter gear (Fig. 20).
(29) On AX 4, install oil slinger and lock nut on
counter gear (Fig. 42).
(30) On AX 5, install fifth gear snap ring (Fig. 65).
(31) Disengage 1-2 and 3-4 synchronizer sleeves.
(32) On AX 5, check counter fifth gear thrust clear-
ance (Fig. 66). Standard clearance is 0.10 - 0.30 mm
(0.004 - 0.010 in.). Adjust clearance with different
thickness snap ring if necessary.
Fig. 65 Checking Fifth Gear Thrust Clearance (AX 5)
Fig. 63 Fifth Gear And Synchronizer Installation (AX 5)
Fig. 64 Installing Fifth Gear (AX 5)
JAX 4/5 MANUAL TRANSMISSION 21 - 23
Page 1586 of 2158
Fig. 66 Shift Components
21 - 24 AX 4/5 MANUAL TRANSMISSIONJ
Page 1587 of 2158
SHIFT MECHANISM ASSEMBLY AND
INSTALLATION
When assembling the shift mechanism, refer
to Figure 66 for component details and loca-
tion.
(1) Install reverse shift arm. Then seat shift fork
in bracket (Fig. 67).
(2) Install reverse idler gear on shaft. Then install
shaft and gear in intermediate plate (Fig. 68). Install
shaft lock plate and tighten attaching bolt to 18 Nzm
(13 ft. lbs.) torque.
(3) Install 1-2 and 3-4 shift forks in synchronizer
sleeves. Then slide No. 2 shift rail through interme-
diate plate and into forks (Fig. 69).
(4) Coat shift rail interlock pins and balls with lib-
eral quantity of petroleum jelly to hold them in place.
(5) Refer to Figure 70 for interlock ball and pin po-
sitions during following assembly steps.
Fig. 68 Installing Reverse Idler Gear And Shaft
Fig. 69 Installing No. 2 Shift Rail and Shift Forks
Fig. 67 Installing Reverse Shift Arm
JAX 4/5 MANUAL TRANSMISSION 21 - 25
Page 1588 of 2158
Fig. 70 Interlock Ball And Pin Position
21 - 26 AX 4/5 MANUAL TRANSMISSIONJ
Page 1589 of 2158
(6) Insert first interlock pin in intermediate plate
(Fig. 71). Use pencil magnet and screwdriver to in-
stall pin.
(7) Install smaller diameter interlock pin in No. 1
rail (Fig. 72).(8) Slide No. 1 rail through 1-2 shift fork (Fig. 73).
(9) Install largest interlock pin between Nos. 1 and
3 shift rails (Fig. 74).
Fig. 71 Installing First Interlock Pin
Fig. 72 Installing Interlock Pin In No. 1 Shift Rail
Fig. 73 Installing No. 1 Shift Rail
Fig. 74 Installing 1-3 Shift Rail Interlock Pin
JAX 4/5 MANUAL TRANSMISSION 21 - 27
Page 1590 of 2158
(10) Install interlock pin in No. 3 shift rail (Fig.
75).
(11) Slide No. 3 rail into reverse shift head (Fig.
76).(12) Assemble reverse shift head and No. 5 shift
rail.
(13) Install No. 5 shift rail in intermediate plate
and engage shift head on No. 3 shift rail (Fig. 77).
(14) Install reverse shift head lock ball with screw-
driver and pencil magnet (Fig. 78).
Fig. 75 Installing No. 3 Shift Rail Interlock Pin
Fig. 76 Installing No. 3 Shift Rail
Fig. 77 Installing Reverse Shift Head
Fig. 78 Installing Reverse Shift Head Lock Ball
21 - 28 AX 4/5 MANUAL TRANSMISSIONJ
Page 1591 of 2158
(15) Shift fifth gear synchronizer sleeve rearward
to lock it (Fig. 79).
(16) On AX 5, install fifth-reverse shift fork in syn-
chronizer sleeve. Then slide No. 4 shift rail into fork
(Fig. 80).(17) Install shift rail lock ball with pencil magnet
and screwdriver (Fig. 81).
(18) Check interlock operation as follows: Move No.
1 shift rail rearward to first gear position. Interlock
operation is OK if remaining shift rails did not move.
(19) Install new shift fork pins (Fig. 82).
Fig. 79 Locking Fifth Synchronizer
Fig. 80 Fifth-Reverse Shift Fork Installation
Fig. 81 Lock Ball Installation
Fig. 82 Installing Shift Fork Pins
JAX 4/5 MANUAL TRANSMISSION 21 - 29
Page 1592 of 2158
(20) Install new shift rail C-rings (Fig. 83).
(21) Apply sealer to threads of lock ball plugs.
(22) Install lock balls and springs in intermediate
plate.Short spring goes in top hole of interme-
diate plate.
(23) Install lock ball and spring plugs (Fig. 84).
Tighten plugs to 19 Nzm (14 ft. lbs.) torque.ASSEMBLING GEARTRAIN AND
TRANSMISSION CASE
(1) Remove intermediate plate from vise.
(2) Install new gaskets on intermediate plate.
(3) Install transmission case on intermediate plate
(Fig. 85).
(4) Install new front bearing snap ring (Fig. 86).
Fig. 83 Installing Shift Rail C-Rings
Fig. 84 Installing Lock Ball Plugs
Fig. 85 Installing Transmission Case
Fig. 86 Installing Front Bearing Snap Ring
21 - 30 AX 4/5 MANUAL TRANSMISSIONJ