Burnout technique A999 trans

Jax said

This is the valve body I have. It is from JVX. It state that it does apply the low/reverse band in 1st gear.
Is it still mandatory to burn out in 2nd? Or is it more a question of recommendation in my case.

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Just re read this and noticed you say it does apply the low band in first gear. You need to contact the company and verify that low band apply means only when the trans brake is on or any time the trans is in first gear.They are not the same thing. If it applies the band in first gear you can burnout in 1st safely. If it only applies the band when the trans brake is on then the recommendation is to burnout in 2nd.