No one knows transmissions & torque converters like


No one knows transmissions & torque converters like 2008-sonnax-logo-white

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Vacuum Test Guides

Great Tools for Transmission Diagnostics

Vacuum Test Guide lineup
  • Learn Locations to Vacuum Test
  • Identify Common Transmission Problems
  • Select Recommended Parts for Quality Repairs

Sonnax pioneered the use of vacuum testing by recognizing that a worn valve or valve body bore can result in incorrect hydraulic pressures, leading to poor performance or failure of the transmission.

Better diagnostics mean better rebuilds and fewer comebacks for your shop, and vacuum testing is an efficient way to evaluate transmission wear and the effectiveness of repairs. Measure the integrity of a circuit by applying vacuum and comparing the vacuum held by that circuit to a known maximum standard.

Sonnax vacuum test guides identify valve body areas most prone to wear and the location to test these circuits in a specific unit.

Vacuum Test set-up

Proper equipment and calibration is essential for accurate vacuum testing!

The Sonnax vacuum test stand kit is a great alternative to building your own testing rig that includes an assortment of testing tips, an anodized test stand to withstand years of use, plus easy-to-follow instructions for assembly, calibration and use.

What should my vacuum test results be?

While a properly calibrated and maintained test stand will give consistent vacuum reading results, evaluating those results requires establishing your own pass/fail standards. Easily record and keep track of your results with the Sonnax vacuum test data sheet. More details on vacuum testing and establishing pass/fail standards can be found in the Sonnax vacuum test stand kit instructions.

Learn Everything You Need to Know About Vacuum Testing

Sonnax experts share full details and recommendations on how to master vacuum testing.

Vacuum Test Guides