2000 S70 t5 automatic transmission failure

[can]

2000 S70 automatic transmission failure. Hello everyone, when the gear lever is in the Drive position, my car does not want to stop at traffic lights even though I press the brake, the engine is almost forced to the point of stopping, it wants to go, I have to put the gear lever in neutral. Then, it becomes very difficult to take off, the gear shifts are very early, I switch the gear lever between other positions a few times and sometimes it works, but after a while the malfunction repeats. I don't know if it has something to do with the malfunction, but the cruise control does not work either, and when I connect it to the diagnostic device, no error codes appear regarding these malfunctions.
I need help with this malfunction. What should I do? Which parts should I check?

[misha]

To access TCM on post '98 p80 cars you need Vida Dice.

[xanthefin]

To access TCM on post '98 p80 cars you need Vida Dice.

If want read, clear codes or reset adaptation.. in TCM 99 Volvos and forward ELM327 v1.4b is enough to access CAN Bus. Costs cup of coffee.

But in seriousness i assume hydraulic converter having some issue if its locked constantly or some solenoid can have issue. But not being expert on this.

Some issues here too been.
viewtopic.php?t=16227

[Clemens]

Did you ever replace the transmission fluid? If not, it might help.

[can]

Did you ever replace the transmission fluid? If not, it might help.

I changed the transmission fluid, the problem seemed to be solved, but after a while the same problem occurred again.

[MoVolvos]

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Taking a guess as I don't know how the throttle communicates with the TCM. Mine is a 2000 S70 SE Base so no turbo. When I had a stalling issue coming to a light it turned out to be a dirty ETM. After cleaning no more stalling.
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