At core teardown, ALL friction material and rubber components are discarded. Pistons ARE NOT air-checked with old seals and reused. "Good enough" isn't.

External case surfaces are painted and gasket surfaces are refinished.

Hard parts are checked against exacting standards and remanufactured using processes available, but largely unused, by most rebuilders.

Problematic hard parts such as 4L60/E reaction shells are replaced with new OE components or aftermarket upgrades.

Units are assembled with OEM hard parts and soft parts except in cases where aftermarket has proven superior.

Valve bodies are remanufactured using the best of factory and Sonnax components and go through a thorough preliminary check on an AXI-LINE valve body tester.

All electronics are functionally tested. TCC, PWM, PSM, and EPC are replaced 100%. Transmissions with solenoid bodies get new OE replacements.

Each part and process is checked by multiple technicians before final assembly.

Transmissions are again tested electronically and hydraulically at very low RPM on the dyno before their actual full-power run.

The Mustang dyno tests the transmission using power and loads that simulate its intended use.

Questions? Call us at 888-625-8691 or use our contact page.