One of our Xtreme Heavy Duty TH400 transmissions for Mueller Performance going through the paces on our Superflow Dynos and Flowbenches transmission dyno. We test shift function, transbrake function (1 2 transbrake in this one!), line pressure, cooler flow, cooler pressure, and dump valve function (which you can see towards the end of the test). #teamhughesperformance2020 Reid Racing Sonnax Raybestos Raybestos Brand Raybestos Powertrain Fragola Performance Systems | Hughes Performance