▁to ▁finish ▁the ▁race ▁due ▁to ▁a ▁g ear box ▁problem . ▁ ▁This ▁constant ▁mesh , ▁sequ ential - shift , ▁ 5 ▁speed ▁g ear box ▁combined ▁with ▁Z F ▁limited - s lip ▁differential ▁in ▁the ▁trans ax le ▁configuration ▁was ▁compact , ▁light ▁( 8 5   l bs ▁including ▁in board ▁bra kes ▁and ▁half sh aft s ) ▁and ▁quick ▁sh ifting , ▁but ▁the ▁reli ability ▁problem ▁had ▁been ▁carried ▁over ▁from ▁the ▁F 1 ▁and ▁F 2 ▁Lot us ▁ 1 2 ▁single ▁se ater . ▁ ▁Series ▁ 2 ▁Col in ▁Chap man ▁h ired ▁a ▁young ▁and ▁tal ented ▁g ear box ▁engineer , ▁Keith ▁D uck worth , ▁to ▁solve ▁this ▁problem , ▁but ▁the ▁priority ▁needed ▁to ▁be ▁on ▁Lot us ▁ 1 6 ▁for ▁Gr ands ▁Prix , ▁which ▁shared ▁the ▁Que er box ▁problem , ▁so ▁a ▁newer ▁version ▁Series ▁ 2 ▁was ▁born ▁while ▁the ▁update ▁was ▁in ▁development ▁in ▁July , ▁ 1 9 5 8 ▁with ▁B MC ▁B - series ▁four ▁speed ▁g ear box ▁attached ▁directly ▁behind ▁the ▁engine , ▁and ▁a ▁conventional ▁differential ▁housing ▁with ▁bra ke ▁disc ▁cal ip ers ▁mounted ▁on ▁the ▁sides . ▁ ▁For ▁the ▁purpose ▁of ▁lower ing ▁the ▁centre ▁of ▁gravity , ▁the ▁Cl im ax ▁engine ▁was ▁t ilt ed ▁about ▁ 2 8 ▁degrees ▁from ▁vertical ▁in ▁the ▁Series ▁ 1 , ▁which ▁was ▁found ▁to ▁cause ▁engine ▁lub ric ation ▁issues , ▁so ▁it