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258mm LU (4T65-E)

Splined Insert

Part No.


Splined Insert
  • Splined Insert


258mm LU (4T65-E)

Splined Insert

Part No. GM-I-33

  • Assembled Height: 0.454"
  • Height: 0.644"
  • Pilot Dia.: 2.315"
  • Internal Spline Tooth Count: 45
  • Material: Hardened Steel
  • Hub Mount: Flanged
  • Pilot Type: Weld-In

OE damper hub splines in GM 258mm LU (4T65-E) converters are made of soft, low-carbon steel and are prone to failure. Sonnax high-strength splined insert GM-I-33 replaces worn or damaged splines, allowing salvage of the damper hub.

  • Hardened steel for added strength and increased wear resistance
  • Superior weld characteristics

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