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By George Bower Does anyone remember “double clutching?” I do. It was a method of shifting a crash box (i.e., non synchromesh) transmission to “synchronize” speeds before a downshift. For example, on a shift from 4th to 3rd gear you would shift from 4th to neutral, let out the clutch and raise...

Author’s note: This is a Volt Powertrain 101 article. The following are not official GM numbers and this analysis should be considered approximate only. The numbers used are based on a very long thread in the GM-Volt forum which can be found here . By George Bower   Remember when GM finally...