Subaru Legacy IV (2008 year). Manual - part 813

6MT-65

Main Shaft Assembly

MANUAL TRANSMISSION AND DIFFERENTIAL

13) Remove the bolt and gasket holding the re-
verse idler shaft.

14) Push the main shaft assembly, driven gear as-
sembly, reverse idler gear and shifter forks to re-
move from the adapter plate all at once.

NOTE:
A helper is required to perform this work.

B: INSTALLATION

1) Adjust the 3rd-4th and 5th-6th shifter fork rods.
<Ref. to 6MT-115, ADJUSTMENT, Shifter Fork
and Rod.>
2) Turn the sub gear counterclockwise for approxi-
mately 3 teeth. Match the sub gear and reverse
idler gear holes, and insert the ST.
ST

18757AA000

STRAIGHT PIN

3) Attach the driven gear assembly to the 1st-2nd
shifter fork assembly.

MT-00546

(A) Sub gear

(B) Reverse idler gear

(A) 1st-2nd shifter fork

(B) Driven gear ASSY

MT-00547

(A)

(B)

MT-00548

(A)

(B)

(C)

6MT-66

Main Shaft Assembly

MANUAL TRANSMISSION AND DIFFERENTIAL

4) Attach the main shaft assembly to the 3rd-4th
shifter fork, and assemble to the driven gear as-
sembly.

5) Attach the 5th-6th shifter fork assembly to the
main shaft assembly.

6) Attach the reverse shifter fork assembly to the
reverse idler gear assembly.

7) Install the reverse idler gear assembly.

8) Install the thrust bearing of the driven gear as-
sembly.
9) Push on the shifter forks, main shaft assembly,
driven gear assembly and reverse idler gear as-
semblies, to attach to the adapter plate all at once.

NOTE:
A helper is required to perform this work.

(A) 3rd-4th shifter fork

(B) 3rd-4th sleeve

(D) Main shaft ASSY

(A) 5th-6th shifter fork

(B) 5th-6th sleeve

MT-00549

(C)

(A)

(B)

(C)

(D)

(A)

(B)

MT-00550

(B)

(A)

(C)

(A) Reverse idler gear ASSY

(B) Reverse shifter fork

(A) Reverse idler gear ASSY

(B) 1st drive gear

MT-00551

(A)

(B)

(C)

MT-00552

(B)

(A)

(C)

6MT-67

Main Shaft Assembly

MANUAL TRANSMISSION AND DIFFERENTIAL

10) Install the plunger, check spring, new O-ring
and check plugs.

Tightening torque:

25 N·m (2.5 kgf-m, 18.4 ft-lb)

11) Install the check ball, check spring, new O-ring
and check plugs.

Tightening torque:

25 N·m (2.5 kgf-m, 18.4 ft-lb)

12) Install a bolt and a new gasket.

Tightening torque:

25 N·m (2.5 kgf-m, 18.4 ft-lb)

13) Use a screwdriver to shift to the 4th gear posi-
tion.

(A) Check plug

(B) O-ring

(D) Plunger

MT-00553

(D)

(A)

(B)

(C)

(A) Check plug

(B) O-ring

(D) Check ball

MT-00554

(D)

(A)

(B)

(C)

MT-00546

6MT-68

Main Shaft Assembly

MANUAL TRANSMISSION AND DIFFERENTIAL

14) Install the reverse idler holder.

15) Install the oil guide B.

Tightening torque:

18 N·m (1.8 kgf-m, 13.3 ft-lb)

16) Install the striking rod.
17) Install the transmission case. <Ref. to 6MT-60,
INSTALLATION, Transmission Case.>
18) Install the selected main shaft snap ring and
washers.
19) Install the center differential. <Ref. to 6MT-57,
INSTALLATION, Center Differential.>
20) Install the transfer driven gear. <Ref. to 6MT-
55, INSTALLATION, Transfer Driven Gear.>
21) Install the extension case. <Ref. to 6MT-43, IN-
STALLATION, Extension Case.>
22) Install the neutral position switch, back-up light
switch and harness. <Ref. to 6MT-41, INSTALLA-
TION, Neutral Position Switch.> <Ref. to 6MT-39,
INSTALLATION, Back-up Light Switch.>
23) Install the manual transmission assembly to the
vehicle. <Ref. to 6MT-34, INSTALLATION, Manual
Transmission Assembly.>

C: DISASSEMBLY

NOTE:
Individual sleeves and hubs meet at a specified po-
sition. Before disassembly, mark the meeting posi-
tion of the sleeve and hub.
1) Affix the ST to the work table.
ST

18664AA000

BASE

2) Flatten the tab of the lock nut.
3) Set the main shaft assembly to the ST, and re-
move the lock nut and washer.
ST1

18665AA000

HOLDER

ST2

18664AA000

BASE

NOTE:
Use a 38 mm socket wrench.

4) Remove the main shaft assembly from the ST.

(A) Reverse idler holder

MT-00544

(A)

MT-01623

MT-00556

ST2

ST1

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