TROUBLESHOOTING SECTION IX Noise in Neutral Possible Causes: (a)   Misalignment of transmission. (b)   Worn flywheel pilot bearing. (c)    Worn or scored countershaft bearings. (d)   Worn or rough reverse idler gear. (e)   Sprung or worn countershaft. (f) Excessive backlash in gears. (g)   Worn mainshaft pilot bearing. (h)   Scuffed gear tooth contact surface. (i) Insufficient lubrication. (j) Use of incorrect grade of lubricant. Noise in Gear Possible Causes: (a)   Worn or rough mainshaft rear bearing. (b)   Rough, chipped, or tapered sliding gear teeth. (c)    Noisy speedometer gears. (d)   Excessive end play of countershaft gears. (e)   Refer to conditions listed under Noise in Neutral. Oil Leaks Possible Causes: (a)   Oil level too high. (b)   Wrong lubricant in unit. (c)    Non-shielded  bearing  used  as  front  or  rear  bearing cap where applicable. (d)   Seals defective, wrong type or omitted from bearing cap. (e)   Transmission breather omitted or plugged internally. (f) Capscrews  loose,  omitted  or  missing  from  remote control,    shifter    housing,    bearing    caps,    PTO    or covers. (g)   Oil   drain-back   openings   in   bearing   caps   or   case plugged with varnish, dirt, or gasket material. (h)   Gaskets shifted or squeezed out of position,  broken gaskets  with  pieces  still  under  bearing  cap,  clutch housing, PTO and covers. (i) Cracks or holes in castings. (j) Loose drain plug. (k)    Oil leakage from engine. (I) Loose speedometer adaptor or connections. Walking or Jumping Out of Gear If the units are walking out of gear, it could be caused by: (a)   External interference, such as the floorboard opening, preventing full engagement, or (b)   An   internal    malfunction,    such    as    worn    clutching teeth,    allowing    the    transmission    to    shift    out    of position. If   a   remote   control   is   being   used,   make   sure   It   is functioning  properly  before  the  transmission  is  blamed for the problem.  Note whether the unit walks out of gear under drive while pulling a load, or on a coast load.  Also, notice whether the gear hop occurs on smooth roads or only   on   rough   roads.      Items   that   would   prevent   full engagement of gears are: (a)   Improperly  positioned  forward  remote  control  which limits   full   travel   forward   and   backward   from   the remote neutral position. (b)   Improper length shift rods or linkage that limits travel of forward remote from neutral position. (c)    Loose bell cranks, sloppy ball and socket joints. (d)   Shift rods, cables, etc. , too spongy or flexible, or not secured properly at both ends. (e)   Worn   or   loose   engine   mounts   If   forward   unit   is mounted to frame. (f) Forward  remote  mount  too  flimsy,  or  loose  on  the frame. (g)   Set  screws  loose  at  remote  control  joints,  on  shift forks inside remote or even inside transmission unit. (h)   Shift fork pad clips or groove in sliding gear or collar worn excessively. (I) Worn taper on gear clutch teeth. (j) Transmission   and   engine   out   of   alignment   either vertically or horizontally. A  few  items  which  could  move  the  gear  or  shaft  out  of proper position, particularly on rough roads are: (a)   Use of heavy shift lever extensions. (b)   Broken shift rod poppet springs. (c)    Worn shift rod poppet notches. (d)   Bent or sprung shift rods. (e)   Shift fork pad clips broken or missing. (f) Excessive    end-play    in    drive    gear,    mainshaft    or countershaft, caused by worn bearings or retainers. (g)   Worn or missing thrust washers. 26