▁was ▁mounted ▁about ▁ 1 7 ▁degrees ▁from ▁vertical ▁on ▁the ▁Series ▁ 2 . ▁ ▁To ▁clear ▁the ▁top ▁of ▁the ▁engine , ▁a ▁larger ▁bon net ▁bul ge ▁with ▁front ▁air ▁sc oop ▁was ▁incorpor ated ▁on ▁the ▁body . ▁ ▁Series ▁ 3 ▁ ▁By ▁the ▁time ▁the ▁Series ▁ 3 ▁was ▁born ▁in ▁ 1 9 5 9 , ▁the ▁Lot us ▁trans ax le ▁had ▁become ▁more ▁reliable ▁thanks ▁to ▁the ▁D uck worth ▁red es ign ▁on ▁its ▁own ▁dry ▁sum p ▁lub ric ation ▁system , ▁but ▁the ▁young ▁engineer ▁pointed ▁out ▁the ▁inher ent ▁limitation ▁of ▁the ▁box ▁in ▁the ▁amount ▁of ▁tor que ▁it ▁can ▁safely ▁handle . ▁ ▁So ▁the ▁Series ▁ 3 ▁was ▁offered ▁with ▁the ▁Lot us ▁' Que er ▁Box ' ▁trans ax le ▁for ▁ 1 . 5 L ▁F PF ▁only , ▁and ▁B MC ▁ 4 - speed ▁or ▁Z F ▁ 5 - speed ▁g ear box ▁with ▁a ▁conventional ▁differential ▁for ▁cars ▁with ▁a ▁larger ▁F PF . ▁ ▁The ▁frame ▁was ▁rein for ced ▁in ▁the ▁areas ▁that ▁are ▁de emed ▁to ▁be ▁weak ▁on ▁Series ▁ 1 ▁and ▁ 2 , ▁and ▁the ▁front ▁susp ension ▁was ▁upgrad ed ▁from ▁the ▁previous ▁configuration ▁which ▁had ▁come ▁directly ▁from ▁Lot us ▁ 1 1 ▁Series ▁ 2 . ▁ ▁Eng ines ▁The ▁larger ▁ 1 . 5 L ▁engine ▁used ▁for ▁Lot us ▁ 1 1 ▁was ▁a ▁b ored ▁and ▁st rok ed