Hello! notice that in the spoken Arabic, there are words which are the same as English words..
Here are the translations:
Steering gear: ( A'jalat al'qeyyadah) , (عجلة القيادة)
Differential (Al'taffadol) , (التفاضل)
Transmission: ( Al'enticall) , (الانتقال)
Transmission shaft : ( A'mood Al'enticall) , (عمود الانتقال)
Note: when there is an apostrophe in the written English words above, this means that you need to separate the previous part of the word from the next part of it! I wrote them in order to help to pronounce them correctly!