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258mm LU (4T65-E), 265mm LU (4T60-E, 4T80-E)

Piston/Damper Assembly
Part No. GM-DA-8

OE Salvaged Assembly, Sold "As-Is", Does not fit the 4T60-E 265mm LU

Sonnax salvaged OE piston/damper assembly GM-DA-8 can be used to replace damaged assemblies in GM 258mm LU (4T65-E) converters.

This hard-to-find salvaged piston/damper assembly can also be used with Sonnax piston plate GM-DA-7P and rivets GM-RV-9 to convert the viscous damper assembly in GM 265mm LU (4T80-E) units, which have a high failure rate due to leaks and cannot be repaired, to a mechanical spring-type damper.

GM-DA-8 can also be used for optional builds in Sonnax racekits GM-RK-16, GM-RK-17 and GM-RK-18.

  • Existing Customers: Contact your sales representative.
  • New Customers: Fill out the form and a sales representative will contact you.
  • Gm da 8 front
  • Gm da 8 back