Load index and speed ratingUpdated 08/06/2023The table below shows the minimum permitted load index (LI) and speed rating (SS). Information on engine and type of gearbox is required to read the table. For information with respect to these details, see .V40Engineman/autMinimum permitted load index (LI)1Minimum permitted speed rating (SS)2T2B4154T5aut91HT2B4204T38man91HT3B4154T4aut91HT3B4204T37man91HT4B4204T19man/aut91HT5B4204T11aut91WD2D4204T8man/aut91HD3D4204T9man/aut91HD4D4204T14man/aut91V