SAAB WIS ONLINE

DISASSEMBLY

DISASSEMBLY

To detect the real cause of trouble, inspect the following items before disassembling.


• Tooth contact of hypoid driven gear and pinion, and backlash

• Runout of hypoid driven gear at its back surface

• Turning resistance of drive pinion


Set the ST on vise and install the differential assembly to ST.

ST 32005055 ATTACHMENT


Drain the gear oil by removing the plug.

Remove the air breather cap.

Note
• Do not attempt to remove the air breather cap if unnecessary.

• When removing the air breather cap, replace the air breather cap with a new one.



(A)

Air breather cap

(B)

Rear cover



Remove the bolts, and then remove the rear cover.

Note

Remove it by tapping with plastic hammer.



(A)

Rear cover

(B)

Differential carrier



Make right and left side bearing retainers in order to identify them at reassembly. Remove the side bearing retainer attaching bolts, set the ST to differential case, and extract right and left side bearing retainers with a puller.

Note

Each shim, which is installed to adjust the side bearing preload, should be kept together with its mating retainer.


ST 32005059 ATTACHMENT


Pull out the differential case assembly from differential carrier.

Note

Be careful not to hit the teeth against the case.



When replacing the side bearing, pull the bearing cup from side bearing retainer using ST.

ST 32005071 PULLER ASSY


Extract the bearing cone with ST.

ST 32005025 PULLER ASSY

Note
• Do not attempt to disassemble the parts unless necessary.

• Set the puller so that its claws catch the edge of bearing cone.

• Never mix up the right and left hand bearing races and cones.



Remove the hypoid driven gear by loosening the hypoid driven gear bolts.


Drive out the pinion shaft lock pin from hypoid driven gear side. (Model without LSD)

Note

The lock pin is staked at the pin hole end on the differential carrier; do not drive it out forcibly before unstaking it.


ST 32005181 STRAIGHT PIN REMOVER


Draw out the pinion mate shaft and remove the pinion mate gears, side gears and thrust washers. (Model without LSD)

Note

The gears as well as thrust washers should be marked or kept separated right and left, front and rear.



(A)

Side gear

(B)

Pinion mate gear

(C)

Thrust washer

(D)

Differential case

(E)

Pinion mate shaft



Hold the companion flange with ST and remove self-locking nut.

ST 32005101 FLANGE WRENCH


Extract the companion flange with a puller.


Press the end of drive pinion shaft and extract it together with the rear bearing cone, preload adjusting spacer and washer.

Note

Hold the drive pinion so as not to drop it.


ST 32005060 DRIFT


Remove the rear bearing cone from drive pinion by supporting the cone with ST.

Note

Place the replacer so that its center-recessed side faces the pinion gear.


ST 32005070 REPLACER


Remove the front oil seal from differential carrier using ST.

ST 32005071 PULLER ASSY


Remove the pilot bearing together with front bearing cone and spacer using ST.

ST 32005060 DRIFT


(A)

Pilot bearing

(B)

Spacer

(C)

Front bearing

(D)

Rear bearing cup



When replacing the bearings, hit out the front bearing cup and rear bearing cup in this order out of case by using a brass bar.


(A)

2 cutouts along diagonal lines

(B)

Hit out alternately with brass bar.