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FRONT AND REAR AXLES
The XRAY NT1 comes standard with a single choice for rear axle, and 2 options for
front axle. The choice of front axle depends on track conditions and driving style.
GEAR DIFFERENTIALS
Differentials allow the wheels at opposite ends of the same axle to rotate at different speeds. Why is this important? When a car turns in a circle, the
outer wheel has a larger diameter circle to follow than the inner wheel, so it needs to rotate faster to keep up. If the differential is too tight, the result
is that the wheels “fi ght” each other for the proper rotation speed; the result is a loss of traction. Generally, the more grip a track has, the tighter
the diff action should be.
The gear differentials included as standard with the XRAY NT1 give smooth differential action
and high durability. Also, due to their geared design, there is none of the gear slippage that
is associated with ball differentials.
Gear differentials are easy to adjust in that there is only one tuning factor — the weight of the
oil used. This makes it very easy to share setups with others using a gear differential.
EFFECTS OF GEAR DIFFERENTIAL ADJUSTMENT
Lighter diff action
(thinner oil)
• Decreases understeer
• Decreases stability under braking and acceleration
• Increases chance of traction roll
Heavier diff action
(thicker oil)
• Increases understeer
• Increases stability under braking and acceleration
• Decreases chance of traction roll
FRONT GEAR DIFFERENTIAL
Lighter diff action
(thinner oil)
• Decreases on-throttle steering
• Less acceleration if the track has good traction
• Less predictable car (cars with very “loose” diffs have a
tendency to understeer heavily under throttle and turn-in
oversteer as soon as you lift)
• Less on-throttle oversteer (snap-oversteer)
• Less turn-in understeer
• Less stable under braking
Heavier diff action
(thicker oil)
• Increases on-throttle steering
• Better acceleration if the track has good traction
• More predictable car (cars with very “loose” diffs have a
tendency to understeer heavily under throttle and turn-in
oversteer as soon as you lift)
• More on-throttle oversteer (snap-oversteer)
• More turn-in understeer
• More stable under braking
REAR GEAR DIFFERENTIAL
ADJUSTING THE GEAR DIFFERENTIALS
Gear differential action is adjusted by fi lling the gear differential with differential oil of a
specifi c viscosity.
Differential oil is rated with a “viscosity” number that indicates the thickness of the oil,
which determines how much the oil resists fl owing. Differential oil with a higher viscosity
(for example, 100 000 cSt oil) is thicker than differential oil with a lower viscosity (for
example, 1000 cSt oil).
The NT1 features new XRAY Premium Silicone Oils manufactured in Europe by a
specialized premium silicone oil manufacturer; these new oils were created exclusively for
XRAY. Each batch of premium oil is laboratory tested and calibrated to ensure the highest
possible consistency and quality from batch to batch. Based on the industry-proven CST
rating, the new line of oils is very easy to identify, adjust, and feel.
•
LIGHTER differential action:
Fill differential with THINNER gear oil
•
HEAVIER differential action:
Fill differential with THICKER gear oil
359330
359340
359350
359360
359380
359392
30.000cSt
40.000cSt
50.000cSt
60.000cSt
80.000cSt
100.000cSt
THIN
THICK
FRONT & REAR AXLES
Rear Axle:
• Rear gear differential (standard)
Front Axles:
• Front gear differential (standard)
• Solid front axle
• XRAY
Multi-Diff™
REMOVE THE NOZZLE
Summary of Contents for NT1
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