d8h torque pressure

If it is the same in every gear forward and reverse you probably have too much internal leakage in the torque converter particularly now with a new pump, but its best to at least to put a gauge on the pump pressure it should be just over 300psi from memory and should be the sme in all 6 gears or you may have excessive leakage on a clutch pack

Kevin

You have an early D8H, does it have a trans pump on the back of the torque up near top? Later ones used the steering pump on the accesorie drive housing for trans and steering. Basically the trans pump puts up oil to fill the clutches, very little oil should be lost there, most goes on to the torque, and then the cooler and back to lube.
Pump pressure should be around 300 as said, speed cl same directional cl 55 lower. Then the TC inlet relief valve is set at 115 psi to protect the torque from blowing up with cold oil. You need to stall torque with cold oil to get this pressure, usually it only reads TC outlet plus 10. The tc outlet relief valve holds a charge in the converter. Any oil leakage into the case is returned to trans by the scavenge pump. Works okay untill warm is translated into "A leak some place" There are many tubes with orings that may be your problem. If your pump/speed clutch pressure gets too low the trans will be forced to neutral.
Later Bob

Im not shure if he changed the correct pump or not. The one that he changed is on the rear top left side of the torque houseing. that sounds like the trans pump you described.

You may be into some resealing of the tubes into the trans. Clean off the trans top and take off the cover, start it up and look for leaks around the oil tubes. The pressure that keeps you in gear is trans pressure, that's higher and before the torque pressure. If pump's new go for tube seals.
Later Bob

Thank you for the advice, thats just what i was looking for a bit of direction. wasent shure were to start after checking pressures 👍

I am not familliar with 235 tractors, however a good test for torque converter condition, after stopping remove bung in bottom and collect oil, should only get half to one gallon of oil, if you get two or three gallons or more, means it is has very high leakage and needs resealing etc. 270 tractors just had the one pump on top RH. If it started flicking out of gear, was often loss of suction, needed 'o' rings at the various fittings on suction side from bottom of transmission right up to the bottom of pump.

Im thinkin along them lines in terms of bad 'o' rings hopefualy thats all it is

I don't now what the serial number the switch was ,but the earily d8h's had a fuel charged torque converter,s in them .see if there are any fuel lines going from the fuel system to the converter. If by chance this is so ,this type of converter would have carbon seals in it . I am not sure these seals are still avalible
If it is an oil charged converter ,like the previous fellow said go to the top of transmission ,and see if there is leakage at the control valve ,look at the bottom front left side at the oil supply tube comming in from the pump to the bottom of the valve, Its hard to see .There are small o rings sealing this tube ,and the earily tractors had yellow o rings sealing these tubes ,and there was a change over to a stronger black o ring .
I would reseal the entire valve assembly,and supply tubes ,and this valve has to be torqued as I remember at 22 lbs on the retaing 12 point bolts in a sequence ,starting in the center ,and working to the ends