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7. Use a 1.5mm hex wrench to remove the two screw pins that
hold the driveshaft yokes to the differential output shafts.
Remove the differential cover and slide the differential out of the
front of the case.
8. To reinstall the differential, reverse the steps.
Front Differential Removal
1.
3x15 BCS
6.
3x15 BCS
3.
5.
4.
3x15 BCS
Rear differential:
1. Remove the two 3x20mm button-head screws that secure the
top bumper mount to diff case.
2. Turn the chassis over and remove the two 3x12mm countersunk
crews that hold the bumper/skid plate to the bulkhead. The two
front screws do not need to be removed.
3. Remove the 3x20mm button-head screw from the bumper
mount and tie bar.
4. Slide bumper assembly off of the chassis.
5. Remove the tie bar from the chassis.
6. Remove the two 3x15mm button-head screws from differential
cover. Do not remove the two screws that secure the shock tower.
Rear Differential Removal
6.
3x15 BCS
1.
3x20 BCS
4.
5.
3. 3x20 BCS
2.
3x12 BCS
7. Remove the differential cover and slide the differential out of the
front of the case.
8. To reinstall the differential, reverse the steps.
Refilling the differentials:
1. Remove the four 2.5x10mm screws from the differential case
and carefully pull the diff case halves apart. Work over a towel to
collect any fluid that drips from the differential.
2. Drain the fluid from the differential. You may wish to remove the
spider gears from the differential to make this easier.
3. Place the spider gears back into the diff case, if you removed
them. Fill the diff case with fluid until it the spider gears are
submerged half way.
4. Rejoin the diff case halves, using care to align the screw holes.
2.
4x10 BCS
Be sure the rubber gasket is in place, or the differential may leak.
5. Install the 2.5x10mm screws and tighten securely.
Center differential
The optional included center differential allows the power from
the motor to be transferred to the front and rear differentials
independently from one another. When the rear wheels are under
more load than the front wheels, more power will be transmitted to
the front wheels. This is very beneficial on rough terrain and makes
hard acceleration from low speeds easier to control by keeping
the nose down. The center differential is assembled with 100K
differential lube from the factory. This viscosity will be a good base
point for most conditions.
1. Locate and remove the two 4x12mm button head machine
screws from the top rear of the chassis and the two 4x12mm
button head machine screws from the bottom of the rear skid
plate (See page 23 for reference).
2. Remove the modular rear end from the chassis by sliding it
backward away from the chassis. This is to access spur gear/
slipper unit. Remove the spur gear/
slipper unit from the rear of the chassis.
3. Insert the included center differential
unit into the rear of the chassis (where
the spur gear/slipper unit was removed).
Stand the chassis up on the front bumper
to hold the spur gear steady and line it
Front of Truck
up with the pinion gear. The splined shaft
adapter must key into the aluminum
center drive shaft.
ADVANCED TUNING ADJUSTMENTS
Line up and mesh the gears
together before attaching the
rear end to the chassis.
Key the splined shaft adapter
into the center drive shaft.
SLASH 4X4 ULTIMATE • 27
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