GM 4025270 — Rear Wheel Bearing (NOS)

$39.99

type: Unknown Type
Vendor: CorvairFarmer

Description:

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GM 4025270 — Rear Wheel Bearing (NOS) Correct GM OE cylindrical roller wheel bearing for mid‑1970s through mid‑1980s GM RWD passenger cars.

PART IDENTIFICATION

Part Number: 4025270 Type: Rear wheel bearing (cylindrical roller) Category: GM rear axle bearing Common Industry Cross‑References:

  • Timken: 5707

  • BCA / SKF / CR: R1563TAV

  • Koyo: R1563‑TAV

  • Generic: 1563TS / R1563

This confirms that 4025270 = GM OE version of the R1563TAV bearing.


📐 2. TECHNICAL SPECIFICATIONS

Attribute Specification
Bearing Type Cylindrical roller (full complement)
Inner Diameter (ID) 1.3998 in (≈35.56 mm)
Outer Diameter (OD) 2.250 in (≈57.15 mm)
Width 0.700 in (≈17.78 mm)
Design Full complement roller, no cage
Seals None (open roller)
Snap Ring Grooves 2 (2I style)
Material Hardened bearing steel
Typical Weight 0.45–0.70 lb depending on brand


🚗 3. FITMENT — VEHICLE APPLICATIONS

This bearing is used across GM RWD passenger cars with the 7.5" / 7.625" axle family.

BUICK

  • Century — 1973–1981

  • Electra — 1976–1985

  • LeSabre — 1973–1987

  • Regal — 1977–1978

  • Riviera — 1977–1978

CHEVROLET

  • Impala / Caprice — mid‑1970s through mid‑1980s

  • Malibu / Chevelle (select years depending on axle)

  • Monte Carlo — 1973–1977 (select)

OLDSMOBILE

  • Delta 88 — 1973–1985

  • 98 — 1977–1984

  • Cutlass (select RWD models)

PONTIAC

  • Bonneville — 1977–1986

  • Catalina — 1973–1981

  • Grand Prix — 1973–1977

NOTES

  • Fitment varies by axle code, not just model year.

  • Always confirm by dimensions + OE number (4025270).

  • GM Part #: 4025270

  • Cross‑Refs: Timken 5707, BCA/CR R1563TAV, Koyo R1563‑TAV

  • Specs: 1.3998" ID × 2.250" OD × 0.700" W

  • Type: Full‑complement cylindrical roller (rear wheel)

  • Applications: Buick, Chevrolet, Oldsmobile, Pontiac RWD models — verify by axle code

  • Condition: NOS, USA‑made

  • LOCATION - UPSTAIRS SHELF - LEFT OF COMPUTER

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