I was lacking in the Cellosaurus entry the DT for T84, however I uncovered a paper:
https://pubmed.ncbi.nlm.nih.gov/25944804/
Which has DT for T84 of 33.9 hours in the supplemental table 1. This informaation and the other 52 cell line doubling times reported by this publication will be added to the next release of the Cellosaurus. So your question was very useful, thank you!