March 02, 2016
Quick upgrades for big performance without a big price tag.
Upgrades for performance recalibration and durability, no trans removal required. Most change in shift feel comes from the servos.
Heavy-duty parts and recalibration allow transmissions to endure power levels beyond what a stock transmission is built to handle.
The ultimate collection of 4L60/E upgrades for maximum strength, durability and quick shifts, including Smart-Tech® parts to ensure trannies stay out of the shop. When installed in a 4L65-E or 4L70-E, a Sonnax Level 3 build delivers a big power tranny that not only exceeds the capabilities of the 650 ft-lb 4L75-E, but is moving well into 4L80-E territory. For those on the fence about swapping transmissions, it's a great way to avoid the complications and inefficiencies of converting to a 4L80-E.
This video breaks down how to transform a 4L60-E, 4L65-E or 4L70-E into a top-tier performance transmission with Sonnax Level 3 build components.
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