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National 18520 Automatic Transmission Pinion RaceOE Quality 60-Day Returns
Part #: 18520

National 18520 Automatic Transmission Pinion Race

Rear Inner, Front Outer, Front Inner, and Rear
⚙️ 80 vehicles fit this part
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✅OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Aston Martin, Jaguar, Jeep, and Rover, 3500, CJ5, DB7, Vanden Plas, XJ, XJ12, XJ6, and XJS
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Overview of National 18520 Automatic Transmission Pinion Race

The National 18520 automatic transmission pinion race is engineered to meet the precise specifications required for select Aston Martin, Jaguar, Jeep, and Rover models. Designed as a taper bearing cup, this component ensures reliable performance within the transmission assembly.

  • Cup bore diameter: 2.8750 inches (73.0250 mm)
  • Cup length: 0.5000 inches (12.7000 mm)
  • Cup radius: 0.0620 inches (1.5750 mm)
  • Part type: Taper bearing cup for automatic transmissions
  • Compatible with various models including Aston Martin DB7, Jaguar XJ6, and Jeep CJ5

Detailed Product Description

The National 18520 pinion race is a critical component in the transmission system, serving as the taper bearing cup that supports the pinion gear. Its precise dimensions, including a 2.8750 inch cup bore and a 0.5000 inch cup length, are designed to maintain proper bearing alignment and reduce wear. The 0.0620 inch cup radius further contributes to the smooth operation of the bearing assembly. This part is manufactured to fit specific automatic transmission systems found in select Aston Martin, Jaguar, Jeep, and Rover vehicles, ensuring compatibility and durability.

Applications and Problem Solving

  • Restores proper bearing fitment in automatic transmissions for models like the Jaguar XJ12 and Rover Vanden Plas
  • Addresses issues related to bearing wear and misalignment in vehicles such as the Jeep CJ5
  • Helps eliminate transmission noise caused by worn pinion races in Aston Martin DB7
  • Supports smooth gear operation by maintaining correct bearing geometry
  • Prevents premature transmission component failure due to improper bearing seating

Installation Notes and Tips

When installing the National 18520 pinion race, ensure the transmission housing is clean and free of debris. Proper seating of the taper bearing cup is essential to avoid premature wear. Use appropriate tools to press the cup bore evenly into place without damaging the cup radius. Verify fitment compatibility with your specific vehicle model before installation.

Quality Assurance

National manufactures the 18520 pinion race to meet industry standards for durability and precision. While no specific warranty information is provided, National parts are known for consistent quality and reliable fitment in compatible Aston Martin, Jaguar, Jeep, and Rover transmissions.

BrandNational
Part Number18520
Cup Bore (Inch)2.8750
Cup Bore (MM)73.0250
Cup Length (Inch)0.5000
Cup Length (MM)12.7000
Cup Radius (Inch)0.0620
Cup Radius (MM)1.5750
Part DescriptionTaper bearing cup

This part fits 80 vehicles. Search below:

YearMakeModelPositionNotes
2004Aston MartinDB7Rear Inner
2003Aston MartinDB7Rear Inner
2002Aston MartinDB7Rear Inner
2001Aston MartinDB7Rear Inner
2000Aston MartinDB7Rear Inner
1998Aston MartinDB7Rear Inner
1997Aston MartinDB7Rear Inner
1992JaguarXJ12Rear Inner
1992JaguarXJSRear Inner
1991JaguarXJ12Rear Inner
1991JaguarXJSRear Inner
1990JaguarXJ12Rear Inner
1990JaguarXJSRear Inner
1989JaguarXJ12Rear Inner
1989JaguarXJSRear Inner
1988JaguarXJ12Rear Inner
1988JaguarXJSRear Inner
1987JaguarVanden PlasRear Inner
1987JaguarXJ12Rear Inner
1987JaguarXJ6Rear Inner
1987JaguarXJSRear Inner
1986JaguarVanden PlasRear Inner
1986JaguarXJ12Rear Inner
1986JaguarXJ6Rear Inner
1986JaguarXJSRear Inner
1985JaguarVanden PlasRear Inner
1985JaguarXJ12Rear Inner
1985JaguarXJ6Rear Inner
1985JaguarXJSRear Inner
1984JaguarVanden PlasRear Inner
1984JaguarXJ12Rear Inner
1984JaguarXJ6Rear Inner
1984JaguarXJSRear Inner
1983JaguarVanden PlasRear Inner
1983JaguarXJ12Rear Inner
1983JaguarXJ6Rear Inner
1983JaguarXJSRear Inner
1982JaguarVanden PlasRear Inner
1982JaguarXJ12Rear Inner
1982JaguarXJ6Rear Inner
1982JaguarXJSRear Inner
1981JaguarXJ12Rear Inner
1981JaguarXJ6Rear Inner
1981JaguarXJSRear Inner
1980JaguarXJ6Rear Inner
1980JaguarXJSRear Inner
1979JaguarXJ12Rear Inner
1979JaguarXJ6Rear Inner
1979JaguarXJSRear Inner
1978JaguarXJ12Rear Inner
1978JaguarXJ6Rear Inner
1978JaguarXJSRear Inner
1977JaguarXJ12Rear Inner
1977JaguarXJ6Rear Inner
1977JaguarXJSRear Inner
1976JaguarXJ12Rear Inner
1976JaguarXJ6Rear Inner
1976JaguarXJSRear Inner
1975JaguarXJ12Rear Inner
1975JaguarXJ6Rear Inner
1974JaguarXJ12Rear Inner
1974JaguarXJ6Rear Inner
1974Rover3500Rear Inner
1973JaguarXJ12Rear Inner
1973JaguarXJ6Rear Inner
1973Rover3500Rear Inner
1972JaguarXJ6Rear Inner
1972Rover3500Rear Inner
1971JaguarXJRear Inner
1970JaguarXJRear Inner
1969JaguarXJRear Inner
1968JaguarXJRear Inner
1962JeepCJ5Front Outer1st Design; 2.875 (in) Cup Bore; 0.50 (in) Cup Length
1962JeepCJ5Front Inner1st Design; 2.875 (in) Cup Bore; 0.50 (in) Cup Length
1961JeepCJ5Front Inner
1961JeepCJ5Front Outer
1960JeepCJ5Front Inner
1960JeepCJ5Front Outer
1959JeepCJ5Front Inner
1959JeepCJ5Front Outer

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

01791151051-2287102915A126471791151812941852018590/18520/Q21817525360826-8573138-0480140215-4546040215-456004253608425360865-10295039755294353512550258618025R91618027R1618027R91631768R91631770R164-00725649180M917017911570683671275678-300041514A53512A6X1494B16177BR18520BT18520C015230C125C15230C23568F18520G10425GHB139GP1200GP1202JD8220KW1258L0129-001M2208TMJM05552S332TY13996AVKBA866W72-397

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.