ɪn ɐn ɐtˈɛmpt tə ɹˈɛktᵻfˌaɪ ðˈɪs, tˈuː fˈɜːðɚ vˈɛɹiənts wɜːɹ ˈɔːɹdɚd, ðə tˈiː twˈɛnti θɹˈiː ˈiː θɹˈiː wɪð tˈoːɹʃən bˈɑːɹ səspˈɛnʃən ænd ðə tˈiː twˈɛnti θɹˈiː ˈiː fˈoːɹ wɪð hˌɔːɹɪzˈɔntəl vˈɑːluːt səspˈɛnʃən.
In an attempt to rectify this, two further variants were ordered, the T23E3 with torsion bar suspension and the T23E4 with horizontal volute suspension.