4L30E, AR25, AR35, A4S 270R

Symptoms:

• Damaged washers
• Excess endplay

Cause:
The plastic material used by the OE melts or breaks under normal operation.

Correction:
Install these bimetal thrust washers to prevent thrust washer breakage and ensure proper endplay.

The OE plastic 3-tab washers break or melt under normal operation in listed GM units. Sonnax 3-tab bimetal thrust washer and shim kit replaces the OE plastic washers in both pump and center support locations.

• The steel tabs on the Sonnax thrust washer eliminate breakage
• The bronze thrust surface will not melt like the OE plastic thrust washers
• Shims provide more flexibility when setting endplay and allow for rebuilding units after thepump has been resurfaced. The Sonnax washer kit can be stacked to cover a build height from .075" through .125" in .010" increments
• This kit contains enough parts for pump and stator support locations

Note:
The Sonnax thrust washer kit cannot be used to replace late style no-tab thrust washers.

Kit Contains:

• 3-Tab Thrust Washers (2) .075"
• Shims (4) .010"
• Shims (2) .030"

Specifications:

• Material: Bimetal
• Tab Count: 3
• Outer Dia.: 2.500"
• Inner Dia.: 1.740"
• Thickness: 0.074"

SONNAX Installation Instructions