TH350 shifting in burnout box
Ive heard not to start your burnout in first gear and shift from 2nd gear with a TH350. Is this proven? I know all the major transmission shops say it. I just recently heard this but I have been doing this for 4 years or so without a single issue. We run a fairly stout sbc with around 600HP and a TCI Competition TH350, trans brake, reverse valve body, etc. 9" 4500 stahl B&M converter. Whats everybodys thoughts? Like I mentioned Ive been doing this for quite some time and never had an issue. Is this a ticking time bomb? Whats the theory behind this?