TOYOTA 90366-40059 Differential Pinion Bearing

The Toyota genuine part with part number 90366-40059 is a premium quality tapered roller bearing designed specifically for the precise and heavy-duty support of the differential drive pinion shaft.

Function & Technical Background

Tapered roller bearings play a critical role in the vehicle's drivetrain. The drive pinion within the differential is subjected to extreme combined radial and axial loads, particularly during acceleration and engine braking. The tapered roller design guarantees the axial rigidity and preload necessary for tooth contact stability, ensuring the optimal gear backlash between the ring gear and drive pinion, as well as quiet, vibration-free power transmission.

Symptoms of Wear & Maintenance

The most common signs of bearing wear and surface fatigue include:

• A humming, growling, or whining noise originating from the differential, which alters with load changes (acceleration or coasting).
• Play or excessive runout in the pinion shaft.
• Differential overheating and oil leakage around the pinion seal caused by shaft instability.
• Increased gear wear or chipped/broken teeth on the ring and pinion set due to excessive backlash.

Technical Specifications

• Manufacturer: TOYOTA (Genuine OEM Part)
• Part Number (SKU): 90366-40059
• Reference / Interchange Number: 9036640004
• Type: Tapered Roller Bearing (BEARING, TAPERE)
• Installation Position: Rear drive pinion rear bearing (Bearing for rear drive pinion rear)

Vehicle Compatibility

• Toyota Dyna / Toyoace (U100/U200/Y100) [1995 - 1997] (BEARING (FOR REAR DRIVE PINION REAR))
• Toyota Dyna / Toyoace (U300/U400/Y200) [1981 - 1985] (BEARING (FOR REAR DRIVE PINION REAR))
• Toyota Dyna / Toyoace (U60-U90/Y50-Y80) [1985 - 1995] (BEARING (FOR REAR DRIVE PINION REAR))
• Toyota Land Cruiser 40 (J40) [1981 - 1984] (BEARING (FOR REAR DRIVE PINION REAR) (BJ42))
• Toyota Land Cruiser 60 (J60) 4.0 [1981 - 1992] (BEARING (FOR REAR DRIVE PINION REAR) (BJ60, 3FE))
• Toyota Land Cruiser 70 (J70) 3.4 TD [1984 - ...] (BEARING (FOR REAR DRIVE PINION REAR) (BJ70, 13BT))
• Toyota Land Cruiser 70 (J70) 4.2 D [1990 - 1993] (BEARING (FOR REAR DRIVE PINION REAR) (FJ75, 1HZ))
• Toyota Land Cruiser 70 (J70) 4.5 [1990 - 1993] (BEARING (FOR REAR DRIVE PINION REAR) (FJ70, 1FZF))
• Toyota Land Cruiser 70 (J70) 3.5 D [1993 - 1994] (BEARING (FOR REAR DRIVE PINION REAR) (PZJ70, 1PZ))
• Toyota Land Cruiser 80 (J80) 4.0 [1990 - 1998] (BEARING (FOR REAR DRIVE PINION REAR) (FJ80, 3FE))
• Toyota Land Cruiser 80 (J80) 4.2 TD [1992 - 1997] (BEARING (FOR REAR DRIVE PINION REAR) (HDJ80, 1HDFT))
• Toyota Land Cruiser 80 (J80) 4.5 [1992 - 1998] (BEARING (FOR REAR DRIVE PINION REAR) (FZJ80, 1FZF))
• Toyota Lexus LX (J80) 4.5 [1995 - 1998] (BEARING (FOR REAR DRIVE PINION REAR) (FZJ80, 1FZFE))
• Toyota Stout (RK11) [1981 - 1985] (BEARING (FOR REAR DRIVE PINION REAR))
• Toyota Stout (RK110) [1981 - 1993] (BEARING (FOR REAR DRIVE PINION REAR))