4.12 Ratio Crown Wheel and Pinion Front Reverse Cut Gears Part No. DA1207

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£301.46 inc. VAT
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Shipping Dimensions:
  • Length: 22cm / 220mm
  • Width: 22cm / 220mm
  • Height: 14cm / 140mm
  • Courier Packing Size: 78 box3
  • Weight: 5.27kg
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4.12 Ratio Crown Wheel and Pinion Front Reverse Cut Gears DA1207

Upgrade the strength and performance of your Land Rovers front differential with the DA1207 4.12 Ratio Crown Wheel & Pinion kit. Designed for demanding off-road and heavy-duty use, this reverse-cut gear set ensures your drivetrain operates smoothly while withstanding extreme loads. The reverse-cut design allows the gear teeth to mesh under pressure rather than pull apart, significantly reducing the risk of wear and damage, giving you a stronger and more reliable front axle.


Constructed from high-quality materials and engineered to exceed original factory specifications, the DA1207 kit provides long-lasting durability and dependable performance. Whether youre replacing worn components or upgrading for enhanced torque and off-road capability, this crown wheel and pinion set delivers precise gear engagement, improved drivetrain efficiency, and peace of mind on every journey. Its robust construction ensures that your Land Rover remains ready for the toughest trails and heavy loads.


Key Features:
  • Heavy-Duty Reverse-Cut Gears: Provides superior strength and durability by meshing gear teeth under load to reduce wear.
  • Optimised 4.12 Ratio: Enhances torque delivery and drivetrain performance in challenging conditions.
  • High-Quality Materials: Engineered for long-lasting reliability and resistance to wear and corrosion.

    With the standard diff design, under extreme conditions, the front diff tries to climb out of full engagement under full power and then easily strips the teeth. 

    Ashcroft has cut the gears in reverse for the front so they try to push together in mesh rather than push out so much stronger then the original design. Ashcroft looked at the materials used and compared these to the genuine materials used by Land Rover. The new range are now made from improved materials which is an improvement over the genuine specification.

    All pinions accept the later 24 spline drive flanges and have the female thread to accept the later type bolt (FS112301P) and washer (FTC5413), all ring gear threads are the stock 3/8 UNF, we stock the late flanges head high tensile bolts for these also FTC5150, see related parts.

    Ashcroft have chosen to coat the crown wheel and pinions in chemical black to aid corrosion resistance and offer a unique appearance.

    Heavy-duty 4.12 ratio using a tooth count of 33 on the crown wheel and 8 teeth on the pinion.

    Front with reverse cut.

    • Defender
    • Discovery 1
    • Range Rover Classic

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