▁and ▁secondary , ▁that ▁rotate ▁within ▁the ▁car rier . ▁ ▁Also ▁not ▁shown ▁is ▁a ▁ring ▁g ear , ▁also ▁called ▁an ▁ann ulus , ▁having ▁internal ▁teeth ▁fitting ▁around ▁the ▁car rier . ▁Input ▁power ▁is ▁applied ▁to ▁one ▁or ▁both ▁sun ▁g ears , ▁and ▁output ▁power ▁is ▁taken ▁from ▁the ▁ring ▁g ear , ▁which ▁turns ▁the ▁drive ▁sh aft . ▁ ▁The ▁FM X ▁transmission ▁is ▁controlled ▁through ▁two ▁cl ut ches ▁called ▁the ▁forward ▁and ▁rear ▁cl ut ches , ▁and ▁two ▁band ▁bra kes , ▁called ▁the ▁forward ▁and ▁rear ▁bands . ▁The ▁cl ut ches ▁and ▁bands ▁are ▁operated ▁by ▁hyd ra ul ic ▁pressure . ▁In ▁this ▁case , ▁forward ▁means ▁closest ▁to ▁the ▁engine . ▁When ▁applied , ▁a ▁cl utch ▁connect s ▁a ▁rot ational ▁component ▁to ▁the ▁engine , ▁causing ▁the ▁component ▁to ▁turn , ▁and ▁a ▁band ▁holds ▁the ▁component , ▁prevent ing ▁it ▁from ▁turning . ▁The ▁forward ▁cl utch ▁controls ▁power ▁to ▁the ▁primary ▁sun ▁g ear . ▁The ▁rear ▁cl utch ▁controls ▁power ▁to ▁the ▁secondary ▁sun ▁g ear . ▁ ▁Conf using ly , ▁the ▁band ▁that ▁holds ▁the ▁rear ▁cl utch ▁is ▁called ▁the ▁front ▁band . ▁The ▁rear ▁band ▁holds ▁the ▁planet ▁car rier . ▁ ▁Inner ▁and ▁outer ▁plan ets ▁A ▁R avig ne aux ▁g ear set ▁is ▁like ▁a ▁simple ▁planet ary ▁g ear ▁set , ▁except ▁that ▁each ▁planet ▁g ear ▁is ▁replaced ▁by ▁a ▁set ▁of ▁three ▁g ears