Team Losi XXX-T Matt Francis Edition Owner's Manual page 19

Figure 37
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Step 18. While holding the outdrive/diff half (77) with the
Allen wrench inserted, carefully place the two outdrive/diff halves
(77) together.
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Step 19. Make sure that the slot in the diff screw (84) is lined
up with the slot in the outdrive/diff half (77) and that the Allen
wrench is inserted in the slot in the diff screw (84).
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Step 20. Hold the diff so that the outdrive/diff half (77) with
the diff nut carrier (73) is pointing up. Slowly turn the top diff
half clockwise to thread the diff screw (84) into the 4-40 mini
locknut (7) in the diff nut carrier (73). Thread the two halves
together until the screw just starts to snug up.
*NOTE: If the screw will not thread into the nut, make sure that
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the nut carrier is pushed all the way into the outdrive/diff half.
When tightening the diff, tighten the screw a little and
then "work" the diff a little. Then tighten the diff a little more
and "work" the diff again. Continue this until the diff is tight.
This will ensure proper seating of all the parts in the diff
assembly.
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Step 21. Tighten the diff until the gear (81) cannot be turned
while both of the outdrives (77) are being held. Final diff
adjustment should be made after completion of the car.
BAG D (Continued)
77
84
1 5
73
81
Figure 37