The output and reaction planetary pinion assemblies in '99-later 4L80-E transmissions frequently wear out and must be rebuilt or replaced. New replacement assemblies can be costly and the availability of quality aftermarket assembly components is limited. Sonnax offers a replacement parts kit [34880RK], which contains all the components needed to rebuild all four planet pinions in a single output or reaction carrier (planet gears not included). Individual components may also be purchased separately.

Kit restores proper operational clearances for worn or failed planet assemblies.
Kit allows for complete rebuild of all the planet assemblies in a carrier.
Individual components allow technicians to replace only the visibly worn components.

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