Losi LOSA3603 - Manual (Page 2)

800-0381
Printed 12/08
Page 2
SmartDiff Maintenance
Team Losi Racing recommends regreasing with SmartDiff Grease (LOSA3607) and inspecting your SmartDiff periodically to
maintain proper performance. Upon disassembly, please check the following:
1) Locate all springs and check for damage. Replace if necessary.
2) Visually inspect all brake surfaces on the small bevel gears (which the cages clamp down on). Check for excessive wear. The
small bevels and cages should be replaced as a set to maintain proper braking force of the diff. The wear rate of the cages and
small bevels depends on spring setup and driving style. If the small bevels start to develop grooves in the braking surface, it is
time for replacement of the small bevel/cage.
3) Be sure to regrease all moving parts and also be sure to grease the outdrive shafts.
4) When reassembling, be sure to check for smooth diff operation and gear mesh.
Tuning Tips
Your SmartDiff comes with four .15mm wire diameter springs installed. This is a baseline setup that delivers a good balance of turn
in precision, and exit acceleration. Changing spring rates will affect the timing at which the SmartDiff starts applying frictional
force to the smaller bevel gears. In essence, the SmartDiff acts as though it has lighter viscosity oil when entering a turn, but
then acts as though it has thicker oil on exiting the corner for increased drive. If the spring count is decreased to only two .15mm
springs, the diff will not turn in as aggressively, but will drive out of the corner harder. For example, when two .20mm springs
are installed with two .15mm springs, the turn in will be more aggressive, while exit acceleration will not be as aggressive. The
SmartDiff comes equipped with 120° ramp plates for a more aggressive on-power drive (90° ramp plates (LOSA3605) are available
for aftermarket use, which will reduce the aggressiveness of the on-power drive).
SmartDiff Spring Setup Matrix
SPRING WIRE DIAMETER OFF-POWER TURN IN ON-POWER DRIVE
4 x .15mm (installed) NEUTRAL VERY AGGRESSIVE
4 x .20mm NEUTRAL/AGGRESSIVE AGGRESSIVE
4 x .25mm AGGRESSIVE NEUTRAL/AGGRESSIVE
4 x .35mm VERY AGGRESSIVE NEUTRAL
SmartDiff Price List
Part Number Description Retail
LOSA3600 Complete Front SmartDiff: 8IGHT 2.0 $99.99
LOSA3601 Complete Center SmartDiff: 8IGHT 2.0 $99.99
LOSA3602 Complete Front SmartDiff: 8IGHT-T 2.0 $99.99
LOSA3603 Complete Center SmartDiff: 8IGHT-T 2.0 $99.99
LOSA3604 Gear and Shaft Set: SmartDiff $29.99
LOSA3605 Ramp Plate, 90 Degree: SmartDiff $19.99
LOSA3606 Return Spring Assortment: SmartDiff $19.99
LOSA3607 SmartDiff Grease $5.99
LOSA3608 Ramp Plate, 120 Degree: SmartDiff $19.99
LOSA6948 8x14x4 Flanged Rubber Seal BB (4) $17.99
LOSB3528 Heavy Duty Diff Case $9.99