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NOK

NOK Rear Pinion Seal | 29-Spline Conversion (1984-95 4Runner / 1979-95 Pickup)

SKU: 1850
$19.95
Fitment support available
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NOK Rear Pinion Seal

For 1984–1995 Toyota 4Runner and 1979–1995 Toyota Pickup with 4WD and a Toyota 8-inch rear differential using the Nitro 29-spline conversion flange with a 41 mm sealing surface.

Overview

NOK is an original-equipment pinion-seal supplier to Toyota. This NOK pinion seal services an already-installed Nitro 29-spline conversion in the Toyota 8-inch rear differential. It seals around the pinion flange where the driveshaft connects to the differential.

The compatible Nitro flange uses a 41 mm sealing surface, rather than the original 38 mm interface. This is a standalone service seal, not a conversion kit or a replacement for the original 27-spline setup.

Key Features

  • NOK pinion seal for the specified Nitro conversion interface
  • 41 mm nominal seal inside diameter for the matching flange sealing surface
  • Rear differential application as listed by vehicle and year
  • Single service seal for replacing a worn pinion seal without purchasing a complete differential overhaul kit

Vehicle Fitment

All applications below are 4WD and require an already-installed Nitro 29-spline conversion with the matching 41 mm sealing-surface flange in the Toyota 8-inch rear differential.

Toyota 4Runner — 1st Gen — 4WD

  • 1984–1989: Rear differential

Toyota 4Runner — 2nd Gen — 4WD

  • 1990–1995: Rear differential

Toyota Pickup — 1st Gen — 4WD

  • 1979–1983: Rear differential

Toyota Pickup — 2nd Gen — 4WD

  • 1984–1988: Rear differential

Toyota Pickup — 3rd Gen — 4WD

  • 1989–1995: Rear differential

Fitment Notes

  • Match the Nitro gear-and-flange conversion in your differential. A 29-spline pinion or a nominal 41 mm flange diameter alone does not establish compatibility; the flange's complete sealing interface must match this seal.
  • Does not fit the original 27-spline, 38 mm sealing-surface configuration.
  • Stock V6 and turbo 8-inch axles on these trucks are also 27-spline, so this seal fits only after a 29-spline conversion.
  • Not for the front differential; see the front pinion seal listing for 1984–1985 4Runner and 1979–1985 Pickup solid front axles.
  • One new Toyota staking pinion nut matched to this Nitro 29-spline conversion is required, not included, and must be sourced and purchased separately by the customer.

Product Specifications

Brand: NOK
Product Type: Pinion Seal
Differential: Toyota 8-Inch
Application: Nitro 29-Spline Conversion with 41 mm Flange Sealing Surface
Nominal Inside Diameter: 41 mm
Position: Rear
Drivetrain: 4WD
Quantity: 1 Seal

Front or Rear Pinion Seal?

NOK Rear Pinion Seal — Best for the Rear Differential

Choose this listing for the rear Toyota 8-inch differential with the Nitro 29-spline conversion.

NOK Front Pinion Seal | 29-Spline Conversion — Best for the Front Differential

Choose that listing for the front differential. Trucks with the conversion in both axles need one of each.

Our Recommendation: Order one seal for each converted differential you are servicing.

What's Included

  • One NOK pinion seal

Gears, pinion flange, pinion nut, bearings and preload-setting components are not included.