I have a Easton fuller 13 speed that won't shift side to side

no VIN told
no country told
no year told
no kind of transmission told , manual or automatic
the only clue is 6th gear,
my 2008 jeep has a 6speed manual transmission
SEE?
let me guess it is a M./T box and has manual foot clutch
and the clutch slips.
seems your shop in town is not so good.

top cause of gears not selecting is the gear shifter linkage is all messed up. (damaged, worn, or adjusted wrong)
or the
main clutch is dragging (bad) or slipping worse.
any shop that knows M/t can diagnose it, but not yours.
the old 6sp mt box has side lever shift links up to 1995
then later the Eaton Fuller FS6406A 6 speed box?2004 up??>?? no year truck told, why must any helper beg fo the year.
with classical. top lever shift and big knob end
the bottom of the classical lever. has tip and this tip can be plastic to stop noise but wears out fast and the H pattern fails to work this is super common super easy cheap fix.
even a $10 fix.


Eaton fix easy, nothing ever was so easy this failure
see the stick?
remove it and see the tip is damaged.
bingo.will not pick gears in the H pattern, or is RAndom
BOX GOOD
CLUTCH GOOD
SHIFT TIP NOT GOOD. A DIRT CHEAP PART.

you found the right place buddy.. i know a lot of websites for repairs and manuals that can really help u..
like reliable-store is pretty good

how many gears in this transmission remembering that Eaton make from 5 speeds up to 21 speeds in their range of transmissions
so if you have a 9 speed box and attempt to select 6 gear without using the range change you will be selecting probably first again
Don't assume that everybody knows what box you have so include all make , model year , equipment application in your posts as they are not linked

make sure to bleed water from air tanks

Check speed sensor at transmission.

Check and see if your Vacuum Lines are broken... That is probably the issue

The transmission speed sensor mounts in the side of the transmission. It has a wiring harness plug and is held in with a bolt and bracket.
What did you replace ??

Have you tired replacing the Vehicle speed sensor, that is what signals the computer to shift into overdrive. The sensor is located on the side of the transmission case where the speedo cable is.

transmission won,t shift from 1st gear,i changed the speed sensors and the shift module,and fluids ,filter,but still the same won,t shift,and ideas as to the problem?

replace the switch