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Fitment Type: Direct Replacement

Items Included: 2-Pack Oversized Sealing Rings

Manufacturer Part Number: 34716-01

Country of Manufacture: United States

Mounting Hardware Included: No

Vintage Part: No

Brand: Sonnax

Type: Input Shaft

Interchange Part Number: S34178BOSK

Surface Finish: Steel Springs & Rollers Only, No Retainer

Country/Region of Manufacture: United States

Universal Fitment: Yes

Performance Part: Yes

4L80-E, 4L85-E Transmission Input Shaft

Oversized Seal Rings
Part No. 34716-01

Package Quantity: 2

    Requires:
  • 34716-TL (Recommended)
GM 4L80-E and 4L85-E forward drums are often replaced due to wear of the sealing ring bore caused by contact with the input shaft. Contact between shaft and drum occurs because of looseness/wear of the support bushings and tight clearance between shaft and drum bore. Worn drums can be salvaged by machining away the worn area, increasing the bore I.D. to .900" and installing the Sonnax oversized outer diameter forward drum sealing rings 34716-01. The oversized seal diameter restores proper sealing with the larger bore, while the increased clearance reduces future wear by making clearance consistent with other applications.
  • Salvages all 4L80-E and 4L85-E forward drums with grooves worn in the I.D. bore
  • Reduces the likelihood of future contact between forward drum I.D. and input shaft

Tool kit [34716-TL] is not required but is highly recommended to prevent damage to the new oversized sealing rings when inserting the input shaft into the machined forward drum I.D. bore.

  • Material: PTFE
  • Seal Style: Solid
  • Height: 0.096"
  • Width: 0.101"
  • Outer Dia.: 0.918"

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