Author: Sonnax Engineering and Technical Services
Subject Matter: Valve body
Unit: U151E-U250E
Vehicle Application: Toyota
Issue: Vacuum testing
From the TASC Force we reprint a series of in-depth test instructions for checking the serviceability of valve bodies.
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The effectiveness in diagnosing automatic transmission malfunctions is an art form. Although there are similarities among the wide varieties of transmissions on the road, each transmission has its own peculiarities. Aside from having mechanical, hydraulic, and electrical hardware systems to contend with, software/programming issues and various vehicle platforms make diagnostics much more difficult. Using scopes provides
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