It’s no secret that the #Sonnax Smart-Tech overrun clutch valve kit is the best way to outsmart overdrive roller clutch failure in hardworking 4L80/85-E transmissions. This kit easily fits ’97-later units…however, with a minor lube tube modification, it can also be installed in ’92-’96 units. Watch this video to see exactly how it’s done! Click here to learn more about this kit: https://www.sonnax.com/parts/4496 | Sonnax
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