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Factory 20-Tooth Speedometer Pinion Assembly, Manual Trans., 80-89 280ZX-300ZX

Factory 20-Tooth Speedometer Pinion Assembly, Manual Trans., 80-89 280ZX-300ZX
You can choose a Z-Car from your garage, or from the selections above, to filter the store or check part fitment.
Part #:20-9614
Price: $48.97
  • (1) 20T (Red) Speedometer Pinion Assembly*

Choosing the right speedometer pinion is very important. One size too large or small will cause your speedometer to give an incorrect reading. Fortunately, Nissan gave us two ways to identify the gear in your car: tooth count and color. This genuine, original equipment (OEM) assembly includes the 20-tooth (red) pinion gear, 21-7187 sleeve (housing), large and small o-rings, and retaining pin, already assembled and ready to install**.

*Assembly Includes:
  • (1) 21-7183 20T (Red) Speedometer Pinion
  • (1) 21-7187 Sleeve (Housing)**
  • (1) 20-1552 Large O-Ring
  • (1) 20-1550 Small O-Ring
  • (1) 21-7190 Locking Pin

Factory Application:
This size speedo pinion was not originally found in Z-Car transmissions. It was offered from Nissan Competition for race drivers that changed the gearing in their differential or tire size. Nissan Competition specifies this pinion size for use with 4.111 Differential Gear Ratios.

Pinion Gear Size Note:
If your Z has a different tire size or differential gear ratio and your speedometer is showing an incorrect reading, you may need to change the pinion gear from the original size to match your current setup. Installing a larger gear size will result in a lower speedo reading, while a smaller gear will result in a higher reading.

**Pinion Sleeve Note:
This Speedometer Pinion Assembly is configured for use with later model transmissions, which are commonly swapped into earlier Z-Cars. There are 2 distinct sleeve types, which position the pinion gear at different offsets. Which housing is correct for your application will depend on the transmission installed in your car and the pinion size you need. This assembly includes our part number 21-7187; refer to "Fitment Notes" on that product page (see Related Items) to determine whether it is the sleeve type you need for your specific application or give us a call at (714)639-2620 or Email us. Although the housing is not currently available separately, this assembly can be purchased and disassembled if you find that the housing matches your application but the pinion does not (a separate roll pin will be required to do this; see Related Items).

Model Guide:
Datsun 280ZX, Nissan 300ZX

Code Guide:
Datsun S130, Nissan Z31

Year Guide:
1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989

Some parts may not fit every version of every year listed. See product Title & Description for any application breakdowns or customization options, and contact us with any questions.

  • 1980 Datsun 280ZX
  • 1981 Datsun 280ZX
  • 1982 Datsun 280ZX
  • 1983 Datsun 280ZX
  • 1984 Nissan 300ZX-Z31
  • 1985 Nissan 300ZX-Z31
  • 1986 Nissan 300ZX-Z31
  • 1987 Nissan 300ZX-Z31
  • 1988 Nissan 300ZX-Z31
  • 1989 Nissan 300ZX-Z31
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