I had missed this post, sorry to hear your issues, but I had almost the exact same thing happen with my TKO in 2016. I had it face plated, and it shifted well at all RPMs. Making a pass at the strip, I shifted into 3rd and nothing was there, just broke all the teeth off 3rd, and split the front of the case, even with a TKO "girdle" on it......... Seems the TKO is a good street trans, but not meant for abuse on the drag-strip with any significant power and/or vehicle weight. I've since gone with a GF-5R and it's been great at the strip, but it sucks not having the OD gear on the street.