The first thing you want to do when determining if you need a TA or not is to check the TA and Direct Drive Clutch Pressure.  To do this you will need a 600# gauge and a fitting to hook up the gauge with.  We also have a tool you can purchase that will give you a more accurate reading, than what the original mfg. checking procedure does.  If the pressure is OK, you may want to check the system with a flow meter, to see if your pump is capable of satisfying the system needs, as per the OEM manual.  If the pump is OK, and the tractor still has a problem, you may want to over fill the system with 5 to 8 gallons more of oil in the transmission, as to cover any place where it may suck air.  You can just leave this amount of oil in the transmission and run it that way, as it won't hurt a thing.  Down through the period of time you are going to lose some, and if you work on a side hill, it will be a big benefit.

    The next thing you need to do is to make sure that the shifting spool is adjusted properly.  With the TA lever back, measure down from the snap ring to the top of the Nut or Valve.  This measurement should be an 1 1/16" to 1 1/8".  Then with the lever in the forward position, the snap ring should be down against the Nut or Valve.  This is very important, and can have a very adverse effect on the way the TA functions if it is not set to these dimensions.  This dimension will not be right for our Pow-er-shift or Brinks Valve.  It should be noted here that the cable on the 86 Series and later tractors can be OK on one shift and malfunction on the next shift, so it is wise to shift it several times and take a measurement each time.  This cable can also slip in the clamps that hold it, so it is best to have some one watch it while you are shifting to see if this is happening or not. 

    Keep this in mind, if the tractor will move regardless of where the TA lever is positioned, YOU PROBABLY DON"T NEED A TA.  the TA has a mechanical device that is automatically locked up until the hydraulic pressure is applied to the direct drive clutches.  The tractor may not have any oil in the transmission and if the engine clutch will engage, the tractor has to move, if this mechanical device is intact and working.  If it is not or the tractor won't move when it is in gear and the clutch is out and working, the you need a TA. (This will not be true if you have our Pow-er-shift TA.)  In most cases the oil will smell burnt and you will notice a great amount of slipping in the higher gears if the direct drive or  highside of the TA is bad.  In saying all of this we are assuming there isn't something else wrong such as a broken gear or something that would interfere with the running of the tractor.


                                  Thing to check first:

        1. Check pressure at the multi control valve

                06 = 235 to 280    66 = 235 to 280    86 = 250 to 280    15 series & larger 2=2 = 250 to 325

        2. Check the travel of the shifting spool

                 1 1/16"  to  1 1/8"

        3. Check the oil level and overfill 5 to 8 gallons

        4. Flow rate the Pump

        5. Call and talk to one of our experienced engineers  1-800-848-1778

    All of the above information is taken from the OEM manual and from the experience of mechanics and shop people.  This information covers the tractor models from 706 and later that have a TA.