D8H46a tranny/tc major heat problems

does your water temp stay in the norm? blockage in inline trans cooler? my 46a trans got hot but also my water temp did because i overlooked packed dirt around the bottom of rad

generally engine runs cool. if i run the engine flat out it will start to run hot & the tranny sort of cool. If i throtle back-cool engine, hot tranny.
radiator is clean.
the tranny oil cooler is also clean
new tranny oil filters

Check the ID of the original pipe, changing a pipe bore from 1.25" down to 1" can cause too much restriction for a part worn pump, the clues are there, it doesn't pick up cold oil in the morning and doesn't produce enough flow to keep the system cool. Low flow means you have little or no lube pressure in the transmission.

You said the problem has been coming on for about 3 weeks, does that coincide with the pipe to hose change or was it the first time it was run if the hose was fitted before that? Did it overheat previously?

Transmission pump pressure you asked about is 300 - 330 psi @ high idle and in neutral.

Should hold 90% of pressures read at low idle. Check and record in all gears.
Later Bob

You said the problem has been coming on for about 3 weeks, does that coincide with the pipe to hose change or was it the first time it was run if the hose was fitted before that? Did it overheat previously?

we talked about that today. the heat prolem has been slowly getting worse over a four week period

Test the Transmission pressure at the filter top purge plug not at the pump for the best effect, I take it "All" the coolers have been stripped out and all the water tubes cleaned?
tctractors