Page 1657 of 2889
(21) Install second gear needle bearing on shaft
(Fig. 63).
(22) Install second gear onto shaft and bearing
(Fig. 64). Verify second gear is seated on synchro
components.(23) Install two-piece thrust washer with halves
seated in the shaft groove and washer lugs seated in
shaft lug bores (Fig. 65). Verify i.d. grooves and
markings noted during removal are facing the correct
direction.
Fig. 61 1-2 Synchro Hub Snap Ring
1 - 1-2 SYNCHRO
2 - SPECIAL TOOL 6310-1
3 - SYNCHRO SNAP RING
Fig. 62 Second Gear Synchro Ring
1 - SECOND GEAR SYNCHRO RING
2 - 1-2 SYNCHRO
3 - SPECIAL TOOL 6310-1
Fig. 63 Second Gear Bearing
1 - SECOND GEAR BEARING
2 - SPECIAL TOOL 6310-1
Fig. 64 Second Gear
1 - SPECIAL TOOL 6310-1
2 - 1-2 SYNCHRO ASSEMBLY
3 - BEARING
4 - SECOND GEAR
21 - 22 MANUAL - NV3500BR/BE
MANUAL - NV3500 (Continued)
Page 1658 of 2889
(24) Start retaining ring around two-piece thrust
washer (Fig. 66). Verify locating dimple is between
thrust washer halves.
(25) Seat thrust washer retaining ring with plastic
mallet (Fig. 67).
Fig. 65 Two-Piece Thrust
1 - WASHER GROOVE IN SHAFT
2 - LUG BORE
3 - THRUST WASHER LUGS
4 - LUG BORE
5 - LUG
6 - WASHER HALF
Fig. 66 Retaining Ring
1 - THRUST WASHER RETAINING RING
2 - THRUST WASHER HALVES
3 - SECOND GEAR
4 - LOCATING DIMPLE
Fig. 67 Thrust Retainer
1 - PLASTIC MALLET
2 - THRUST WASHER RETAINING RING
BR/BEMANUAL - NV3500 21 - 23
MANUAL - NV3500 (Continued)
Page 1659 of 2889
(26) Install third gear needle bearing on shaft (Fig.
68).
(27) Install third gear on shaft and bearing (Fig.
69).
(28) Install third speed synchro ring on third gear
(Fig. 70).
(29) Assemble 3-4 synchro hub, sleeve, springs,
struts and detent balls.CAUTION: The 3-4 synchro hub and sleeve can be
installed backwards if care is not exercised. One
side of the sleeve has grooves in it, this side of
sleeve faces the front of the shaft.
(30) Start 3-4 synchro hub on output shaft splines
by hand (Fig. 71).
Fig. 68 Third Gear Bearing
1 - THIRD GEAR BEARING
Fig. 69 Third Gear
1 - THIRD GEAR
2 - BEARING
Fig. 70 Third Gear Synchro Ring
1 - THIRD SPEED SYNCHRO RING
2 - THIRD GEAR
Fig. 71 3-4 Synchro Hub On Output Shaft
1 - GROOVED SIDE OF SLEEVE
2 - 3-4 SYNCHRO ASSEMBLY
21 - 24 MANUAL - NV3500BR/BE
MANUAL - NV3500 (Continued)
Page 1660 of 2889

(31) Press 3-4 synchro assembly onto output shaft
with shop press and suitable size pipe (Fig. 72). Ver-
ify tool presses on hub as close to output shaft as
possible but does not contact the shaft splines.
(32) Install thickestnew3-4 synchro hub snap
ring (Fig. 73) that will fit in shaft groove. Verify snap
ring is seated in groove.
NOTE: Snap rings are available in thicknesses from
2.00 - 2.30 mm (0.078 - 0.090 in.).(33) Install output shaft bearing.
(34) Install output shaft bearing snap ring with
heavy duty snap ring pliers (Fig. 74). Verify snap
ring is seated in shaft groove.
NOTE: Spread snap ring only enough to install it.
(35) Verify position of synchro sleeves before pro-
ceeding (Fig. 75). Grooved side of 3-4 sleeve must be
facing forward. First gear side of 1-2 sleeve must be
facing first gear. Tapered side of fifth-reverse sleeve
must be facing forward.
REVERSE IDLER ASSEMBLY
(1) Lubricate idler components with gear lube.
(2) Slide idler gear bearing on shaft (Fig. 76).
Bearing fits either way on shaft.
(3) Slide gear onto shaft. Side of gear with recess
goes to rear (Fig. 76).
(4) Place first lock ball in dimple at rear end of
idler shaft (Fig. 76). Petroleum jelly can be used to
hold ball in place if desired.
(5) Slide thrust rear thrust washer onto shaft and
over lock ball (Fig. 77).
(6) Install snap ring in groove at rear of shaft (Fig.
77).
(7) Install lock ball in dimple at front of shaft.
Hold ball in place with petroleum jelly if desired.
Fig. 72 Press 3-4 Synchro On Output Shaft
1 - PRESS RAM
2 - PIPE TOOL
3 - 3-4 SYNCHRO
4 - THIRD SPEED SYNCHRO RING
Fig. 73 3-4 Synchro Hub Snap Ring
1 - 3-4 SYNCHRO HUB SNAP RING
2 - HEAVY DUTY SNAP RING PLIERS
Fig. 74 Output Shaft Bearing Snap
1 - BEARING SNAP RING
2 - HEAVY DUTY SNAP RING PLIERS
BR/BEMANUAL - NV3500 21 - 25
MANUAL - NV3500 (Continued)
Page 1661 of 2889
Fig. 75 Synchro Sleeve Locations
1 - DOUBLE GROOVE FORWARD
2 - GROOVE FORWARD
3 - FIRST GEAR SIDE MARKING TOWARD FIRST GEAR
4 - TAPER FORWARD5 - GROOVE FORWARD
6 - 5TH-REV SYNCHRO SLEEVE
7 - 1-2 SYNCHRO SLEEVE
8 - 3-4 SYNCHRO SLEEVE
Fig. 76 Idler Gear And Bearing
1 - IDLER GEAR
2 - BEARING
3 - LOCK BALL
4 - REAR OF SHAFTFig. 77 Idler Gear Rear Thrust Washer
1 - LOCK BALL
2 - SNAP RING GROOVE
3 - THRUST WASHER
21 - 26 MANUAL - NV3500BR/BE
MANUAL - NV3500 (Continued)
Page 1662 of 2889

(8) Install front thrust washer on shaft and slide
washer up against gear and over lock ball (Fig. 78).
(9) Install wave washer, flat washer and remain-
ing snap ring on idler shaft (Fig. 78). Verify snap
ring is seated.
SHIFT SHAFT AND DETENT PLUNGER BUSHINGS/
BEARINGS
(1) Inspect shift shaft bushing and bearing for
damage.
(2) If necessary, the shift shaft bushing can be
replaced as follows:
(a) Locate a bolt that will thread into the bush-
ing without great effort.
(b) Thread the bolt into the bushing, allowing
the bolt to make its own threads in the bushing.
(c) Attach a slide hammer or suitable puller to
the bolt and remove bushing.
(d) Use the short end of Installer 8119 to install
the new bushing.
(e) Bushing is correctly installed if flush with
the transmission case.(3) If necessary, the shift shaft bearing can be
replaced as follows:
(a) Locate a bolt that will thread into the bear-
ing without great effort.
(b) Thread the bolt into the bearing as much as
possible.
(c) Attach a slide hammer or suitable puller to
the bolt and remove the bearing.
(d) Use the short end of Installer 8119 to install
the new bearing.
(e) Bearing is correctly installed if flush with the
transmission case.
(4) Inspect detent plunger bushings for damage.
NOTE: The detent plunger bushings are installed to
a specific depth. The space between the two bush-
ings when correctly installed contain an oil feed
hole. Do not attempt to install the bushings with
anything other than the specified tool or this oil
hole may become restricted.
(5) If necessary, the detent plunger bushings can
be replaced as follows:
(a) Using the long end of Installer 8119, drive
the detent bushings through the outer case and
into the shift shaft bore.
(b) Remove the bushings from the shift shaft
bore.
(c) Install a new detent plunger bushing on the
long end of Installer 8118.
(d) Start bushing in the detent plunger bore in
the case.
(e) Drive bushing into the bore until the tool
contacts the transmission case.
(f) Install a new detent plunger bushing on the
short end of Installer 8118.
(g) Start the bushing in the detent plunger bore
in the case.
(h) Drive bushing into the bore until the tool
contacts the transmission case.
GEARTRAIN ASSEMBLY
(1) Install Adapter 6747-1A on input shaft hub of
Fixture 6747 (Fig. 79). Then install Adapter 6747-2B
on front bearing hub of countershaft. Be sure the
shoulder is seated against the countershaft.
(2) Install input shaft in fixture tool. Make sure
Adapter Tool 6747-1A is positioned under shaft as
shown (Fig. 80).
(3) Install pilot bearing in input shaft (Fig. 80).
NOTE: The side of the pilot bearing with the small
diameter goes toward the input shaft.
Fig. 78 Idler Gear And Shaft Assembly
1 - REAR OF SHAFT
2 - GEAR
3 - THRUST WASHER AND BALL
4 - WAVE WASHER
5 - FLAT WASHER
6 - FRONT OF SHAFT
7 - SNAP RING
8 - SNAP RING
BR/BEMANUAL - NV3500 21 - 27
MANUAL - NV3500 (Continued)
Page 1663 of 2889
(4) Install fourth gear synchro ring on input shaft
(Fig. 81).
(5) Adjust height of idler gear pedestal on assem-
bly fixture (Fig. 82). Start with a basic height of 18.4
cm (7-1/4 in.). Final adjustment can be made after
gear is positioned on pedestal.
Fig. 79 Fixture For Geartrain Build-up
1 - ADAPTER 6747-2B
2 - CUP 8115
3 - ADAPTER 6747-1A
4 - FIXTURE 6747
Fig. 80 Pilot Bearing And Input Shaft
1 - PILOT BEARING
2 - INPUT SHAFT
Fig. 81 Fourth Gear Synchro
1 - FOURTH GEAR SYNCHRO RING
2 - INPUT SHAFT
Fig. 82 Idler Pedestal Base Height
1 - REVERSE IDLER PEDESTAL
21 - 28 MANUAL - NV3500BR/BE
MANUAL - NV3500 (Continued)
Page 1664 of 2889

(6) Install assembled output shaft and geartrain in
input shaft (Fig. 83). Carefully rotate output shaft
until the 3-4 synchro ring seats in synchro hub and
sleeve.
(7) Install Adapter 6747-2B on front bearing hub
of countershaft, if not previously done. The shoulder
goes toward the countershaft.
(8) Slide countershaft (and adapter) into fixture
slot. Verify countershaft and output shaft gears are
fully meshed with the mainshaft gears before pro-
ceeding (Fig. 84).(9) Check alignment of countershaft and output
shaft gear teeth. Gears may not align perfectly a dif-
ference in height of 1.57 to 3.18 mm (1/16 to 1/8 in.)
will probably exist. This difference will not interfere
with assembly. If difference is greater than this, the
countershaft adapter tool is probably upside down.
Remove countershaft, reverse adapter tool, reinstall
countershaft and check alignment again.
(10) Position reverse idler in support cup of assem-
bly fixture (Fig. 85). Verify idler gear is properly
meshed and aligned with shaft gear teeth and that
bolt holes are facing out from the geartrain. Adjust
pedestal up or down if necessary and verify short end
of idler shaft is facing up as shown.
Fig. 83 Output Shaft And Geartrain Installed In Input
1 - OUTPUT SHAFT AND GEARTRAIN
2 - INPUT SHAFT
3 - FIXTURE 6747
Fig. 84 Countershaft On Fixture Tool
1 - OUTPUT SHAFT AND GEARTRAIN
2 - COUNTERSHAFT (SLIDE INTO PLACE ON FIXTURE TOOL)
BR/BEMANUAL - NV3500 21 - 29
MANUAL - NV3500 (Continued)