4R100 Sonnax Valve Tricumulator kit
Product Description
The Sonnax valve and Tricumulator springs increase the line pressure in the tranny to firm up the shifts and make them happen faster from start to finish. You will be able to tell a seat of the pants difference in shifting without needing a neck brace. These are very easy to install; plan on about 2 hours start to finish. While you are installing these, take a few extra minutes to change your tranny filter, too.
