No not true. I do it a lot. My friend has a almost 400whp turbo auto tC and has done it every shift for almost 50,000 miles. His tranny is perfectly fine.
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Next Mods: 9.5psi pulley(waiting to install), Forge 007 BPV, Boost, Wideband, and oil Pres. gauges, Stage 2 Cams, AEM F/IC and tune
300whp here I come 
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