Traxxas 4-Tec Drift Ford Mustang

Stock is as the vehicle ships. Calculated is worked from the stock figures on this page rather than stored beside them, so the two cannot drift apart. Not applicable means the vehicle does not come with it, like the motor on a roller or the tires on a race kit, or does not have one, like a KV rating on a brushed motor. Not published means it exists but no source we could find prints it.

How does this gearing compare with similar cars? What's a normal final drive for your RC?

Gearing parts

Tooth counts are the ones in the specifications above. Pitch is given as metric module (Mod 1, Mod 0.8) or diametral pitch (32P, 48P). They are different standards and are not interchangeable, even where the numbers look close. Bore is the pinion’s hole, listed separately from the motor shaft (3 mm on the stock motor). Linked part numbers go to the maker's or official distributor's page for that part.

Buying a new pinion or spur? Check what’s fitted first: Why your RC's gear specs might not add up

How these numbers were settled

The owner's manual gear chart (p. 26) marks a 19T pinion on the 72T spur as the out-of-box setup for a 7-cell NiMH or 2-cell LiPo pack.

• The chart cells give only the spur-to-pinion ratio (3.79 for 19/72), while the formula above the chart multiplies it by 2.94, so the total of 11.14:1 is worked out from those figures.
• The parts list sets the 19-tooth pinion (2419) and the 72-tooth spur (8368) in regular type as stock, and both part pages list this car as a stock fitment.
• The car is rear-wheel drive with a spool.
• No optional pinion comes in the box.
• The product page prints no gear ratio.
• The motor is a brushed Titan Drift 550 (21 turns), so there is no KV rating and the no-load speed cannot be worked out.
• The XL-5 ESC is rated for 4 to 7 NiMH cells or a 2-cell LiPo.
• Two sets of 1.9 in drift tires are in the box, hard compound fitted and soft compound for smooth indoor tracks; Traxxas does not publish their outer diameter, so the tire is left blank.
• The product page prints two battery compartment heights, 23 mm or 26 mm, so the tray size is left blank.
• The Nissan 240SX version (105247-4) has the same gears, motor, ESC and tires under a different body.

Documents

• ManualOwner's manual, model 105237-4 (Traxxas PDF) (opens in a new tab)Gearing p. 25-26
• Gearing chartGearing compatibility chart, owner's manual (Traxxas PDF) (opens in a new tab)p. 26
• Parts listParts list, 105237-4 (Traxxas PDF) (opens in a new tab)Spur gears & pinion gears, p. 3
• Exploded viewExploded view, chassis assembly (Traxxas JPG) (opens in a new tab)

Sources

• 4-tec-drift-ford-mustang-10…traxxas.com (opens in a new tab)
• Manual (PDF)traxxas.com (opens in a new tab)
• Manual (PDF)traxxas.com (opens in a new tab)
• 2419-19-tooth-pinion-gear-4…traxxas.com (opens in a new tab)
• 8368-72-tooth-spur-gear-48-…traxxas.com (opens in a new tab)
• 10575-19-gray-6-spoke-rear-…traxxas.com (opens in a new tab)
• 4-tec-drift-nissan-240sx-10…traxxas.com (opens in a new tab)
• Manual (PDF)traxxas.com (opens in a new tab)

Every figure on this page traces to one of these. Where they disagreed, the note above says which was used and why.

More from Traxxas

• X-Monster Chassis
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• XRT 8S
• 4-Tec 2.0 Nissan 240SX Brushless
• Bandit 2WD VXL
• Bandit XL-5 with Battery
• BIGFOOT 4X4 BL-2s
• BIGFOOT No. 1 BL-2s