Traxxas T-MAXX 3.3 Installation Instructions

Forward-Only Kit Installation
Tools Needed
1.5mm hex wrench
2.0mm hex wrench
2.5mm hex wrench
Needle nose pliers
Small flat-tip screwdriver
Side-cutters (wire cutter)
Remove the transmission
1. Loosen the 3x3mm grub screw on
top of the brake cam to remove the
brake rod from the brake cam. (A)
2. Position the throttle and the shift
servo horns perpendicular to the
servo (see image B), and then
remove the 3x8mm button head
machine screws that secure them.
3. Gently lift the throttle servo horn off
of the throttle servo, and then
disconnect the return spring from the
transmission case. Note: Be careful
not to move the position of the servo
output shaft. This must
remain in the same position
for re-installation of the servo
horn later. (C & D)
4. Next, lift the shift servo horn
from the shift servo, and
then disconnect the shift
linkage wire from the shift fork. (E)
5. Open the receiver box to access the
OptiDrive ™ control unit, and then
unplug the sensor wire (blue plug). (F)
6. Now, turn the truck upside down to
access the rear driveshaft, and then
remove the 4x15mm screw pin from
the rear output yoke on the
transmission. Pull the output yoke
from the shaft, and then push it to
the rear to clear the shaft during
removal. (G)
7. While holding the transmission with
one hand, remove the seven
3x12mm cap head machine screws
located in the chassis braces that
secure the transmission to the
chassis. The transmission should then
drop from the chassis. (H & I)
H I
Traxxas, 1100 Klein Road, Plano, TX 75074, Phone: 972-265-8000, Fax: 972-265-8011, e-mail: support@Traxxas.com
A
B
C D
E
F
G
w w w . T R A X X A S . c o m
Replace the forward/reverse gears with
the forward-only components:
1. Remove the seven 3x12mm
countersunk machine
screws from the
transmission case, and
carefully separate the two
gearbox halves. (J & K)
2. Remove the OptiDrive sensor from the
gearbox half and replace the sensor
with the cover (included). Use the same
two 2.5x6mm cap head machine
screws. (L)
3. Slide the shift fork with the drive dog
carrier out of the gearbox half, and
plug the shift fork hole with the blue
plug (included - see image). Note: The
black shift shaft seal is glued to the
gearbox half from the factory. The blue
plug can be inserted into gearbox with
or without the grommet installed.
Remove the reverse idler gear along
with the forward and reverse output
gears, output shaft and drive dog
carrier. (M)
4. Remove the forward primary gear
(#5396X) from the two-speed shaft, and
then replace it with the
forward-only primary
gear. Use a small flat-
tip screwdriver to aid in
removing the C-ring
that retains the primary
gear pin. (N & O)
5. Secure the forward-only primary
gear to the two-speed shaft using
the included 2.0mm screw pin. (P)
6. Install the forward-only shaft with
output gear into the rear gearbox
half, and carefully join
the two gearbox
halves together (see
photo for orientation).
Fasten the halves
together with seven
3x12mm counter-
sunk machine screws. (Q & R)
Remove the unused electronics from the chassis
OptiDrive control box
1. Unplug the throttle servo from the
OptiDrive module. Unplug the
OptiDrive module from channels 2 and
3 on the receiver (gray and green). Plug
the throttle servo into the CH2 port on
the receiver. (S)
Covers Part #5195
J K
L
M
Components removed
from the transmission
N O
P
Q R
S
Form 5195INST Rev 060503