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It is not recommended to use the heavier springs in the lighter damper assembly even though they fit. The stops in the lighter damper which prevent the springs from bottoming do not work for the heavier springs.

245mm LU (3T40, 3L30, 200C, 4T60-E, 4L60 & E:S-10 only)

Damper Spring
Part No. GM-SD-2

Sonnax damper spring GM-SD-2 replaces worn or weak inner damper springs in late GM 245mm LU converters used with 3.4L engines. There are two different damper assemblies used in GM 245mm torque converters: late assemblies have heavier damper springs (.110" inner spring wire diameter) and are used with 3.4L engines, while earlier assemblies have lighter springs (.101" inner spring wire diameter).

  • Four springs per damper
  • Wire Dia.: 0.110"
  • Length: 1.840"
  • Outer Dia.: 0.482"
  • Existing Customers: Contact your sales representative.
  • New Customers: Fill out the form and a sales representative will contact you.
  • Gm sd 2