Losi LOSB0081 User Manual

Removing The Front Differential - continued

Remove the 5-40 shock screws from the suspension arms. (fig. 3) Loosen the 5-40 set screws on the sway bar ball
ends. Remove the two 5-40 flathead screws from the front of the diff cover (fig. 4), and remove the two 5-40
caphead screws from the bottom of the diff cover. Slide the diff cover off of the bulkhead and remove the diff. (fig. 5)

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Removing The Rear Differential

To remove the rear differential, the “rear clip” of your 8IGHT RTR has to be removed. Remove four 8-32 flathead screws from
the chassis and the 5-40 flathead screw from the brace (fig. 6). Lift the rear clip up and off of the chassis (fig. 7).

6

Loosen the 5-40 setscrews on the sway bar ball ends and remove the ball ends from the sway bar. Remove four 5-40
flathead screws from the rear clip (fig. 8). Slide the pivot support and rear diff cover off of the bulkhead and remove
the diff (fig. 9).

4

7

5

8

Removing The Center Differential

To remove the center differential, the radio tray on your 8IGHT RTR has to be removed.

• Turn on the transmitter and receiver.

• Note the position of the throttle and steering servo horns. This is important so you know where
to position the servo horns during re-assembly.

• Remove the 3mm Phillips head machine screw, (fine threads), from the steering servo and the 3mm self
tapping screw, (coarse threads), from the throttle servo, (fig.10). Remove the servo horns leaving the
inserts on the servos. Turn the transmitter and receiver off.

• Remove the four 8-32 x 3/8” flathead screws from the radio tray, (fig. 11).

Front

10

11

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9

Removing The Center Differential - continued

• Remove the radio tray from the chassis, (fig. 12).

• Pop the ball end off of the carburetor slide, fig. (12A)

• Remove four 8-32 x 1/2” flathead screws from the center differential housing, (fig. 13), and remove the
center diff from the chassis.

• Remove four 5-50 x 3/8” button head screws from the center top brace, (fig. 14).

• Slide the front and rear brake rotor assemblies off of the center diff, (fig. 15). NOTE: There are two
different size brake discs. The large disc is in the front brake assembly and the small disc is in the rear
brake assembly.

13

12

13

12A

14

Diff Service - Refer to exploded views on page 8.

• Remove the four 3mm flat head screws from the ring gear allowing it to be removed (use the 5/64 allen wrench).

• Inspect the ring and pinion gears for wear - replace if necessary.

• Remove the cross shafts and bevel gears from the carrier.

• Clean and inspect all parts - replace as needed.

• Check all ball bearings. Clean or replace as necessary.

• Lube all shafts and gears with LOSA3066 assembly grease and reassemble.

• Load cross shafts with gears into the carrier with extra grease. Apply the diff
seal gasket to the carrier and reinstall ring gear.

• Lube ring and pinion and with grease (LOSA #3066), and reassemble diff into diff housing.

• Grease the edges of the gear cases. This will ensure a dust free seal.

• Reinstall into chassis

For Viscous Differential

Instead of grease you can use Silicone fluid in the differential for a limited
slip feel as desired for racing. Simply fill the diff up to the top of the gears
before replacing the ring gear. (Be sure to reinstall the rubber gasket).
You may have to replace the o-rings on the outdrives at the same time
you change to this type of differential if the old ones are worn. Team Losi
recommends 5000cs. fluid for the front diff, 7000cs. fluid for the center diff,
and 2000cs. fluid for the read diff.

15

TEAM LOSI

SILICONE DIFF FLUID

A5278 - 2000 cs.
A5280 - 5000 cs.

A5281 - 7000 cs.

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