Toyota UA/UB Archives - Transmission Digest
Understanding lube flow control valves in Toyota/Lexus UA/UB80 transmissions

The Toyota/Lexus UA80 and UB80 transmissions first came out in 2017 in Highlanders and Siennas. The UA80 is used in V6 applications, and the UB80 is paired with four-cylinder versions. They have been called Toyota New Global Architecture type transmissions, and alternately referred to as the “Direct Shift 8AT” eight-speed automatic transmission. This transmission was

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Inside Toyota’s UA-UB80E/F torque converter

The UB80E/F family of transmissions used in Toyota L4 applications, and the UA80E/F used in V6 engine applications, should not be confused with the AWF8G30 transmission. Although similar, they are significantly different.  The converters used in these applications are like other known systems. Within this system, there are two very important sealing rings that need

Toyota/Lexus UA/UB series: Critical wear areas and vacuum test locations

Sonnax has provided the following guide on critical wear areas and vacuum test locations for the Toyota/Lexus UA and UB lines of transmissions. Technicians working on these models should find this guide helpful. Read more stories from our TASC Force Tips series here.

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