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Volvo 2.5T AWD 2003 Automatic delay 3 to 4

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greffel
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Volvo 2.5T AWD 2003 Automatic delay 3 to 4

Post by greffel » Sun May 17, 2020 2:26 pm

Hello
Need some advice what to do next with my beauty :)

I have a delay (increase in revs) when shifting from 3 to 4, every other gearshift is perfect.

I started to replace the B4 servo cover and that did nothing. The old one was the older version but no lose washer.

Then I did a flush of the transmission replacing 16 liters of ATF. The oil coming out was like new :) but still delay in the shift from 3 to 4.
Did the oil counter reset and adaptation reset in Vida also.

Should I wait for the new oil to maybe loosen up some dirt in the system or should I do a Adaptation Relearn

ignatz
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Re: Volvo 2.5T AWD 2003 Automatic delay 3 to 4

Post by ignatz » Mon May 18, 2020 2:45 am

I'd just drive it and let it relearn. Try to "feather" the gas pedal, if you think your on a section of road where a shift flare might happen. Hopefully it will get better. I read somewhere that the relearning can take some time.
98 S70 T-5

firstv70volvo
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Re: Volvo 2.5T AWD 2003 Automatic delay 3 to 4

Post by firstv70volvo » Mon May 18, 2020 9:59 am

greffel wrote:
Sun May 17, 2020 2:26 pm
Hello
Need some advice what to do next with my beauty :)

I have a delay (increase in revs) when shifting from 3 to 4, every other gearshift is perfect.

I started to replace the B4 servo cover and that did nothing. The old one was the older version but no lose washer.

Then I did a flush of the transmission replacing 16 liters of ATF. The oil coming out was like new :) but still delay in the shift from 3 to 4.
Did the oil counter reset and adaptation reset in Vida also.

Should I wait for the new oil to maybe loosen up some dirt in the system or should I do a Adaptation Relearn
Read about the difference between control module adaptation CMA and reset adaptation RA as explained by Botbasher. This is very good information about the different adapt modes.
I recently rebuilt the transmission in my car and only did the reset adaptation, which was recommended by the shop and helped but the major changes with the new transmission parts I still don't have a perfectly shifting transmission so I'm going to do a CMA when I get my Vida/Dice tool. My transmission shifts very good except for one shift under certain conditions, there's a slight shudder during the 3 to 4 shift under heavy throttle so I'm going to do the CMA to see if this helps. I'll let you know the results.
The 3 to 4 shift requires precise timing between releasing the 3rd gear brake band and applying the 4-5 clutch and in my case with a new brake band and clutch frictions the reset adaptation may not have been enough to compensate for the changes(new parts).

My suggestion for you would be to try doing the control module adaptation if you haven't already done so although I'm curious how your problem started. Did the 3-4 delay/slipping begin gradually or was there any changes made to the transmission and the problem started after that? I'm just wondering if the problem may be due to a badly worn transmission (4-5 clutch) or was did the problem begin suddenly after any transmission changes. The CMA may help as long there's not mechanical/worn out problem with the transmission.

this is very good information
viewtopic.php?f=9&t=81188&start=10

greffel
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Re: Volvo 2.5T AWD 2003 Automatic delay 3 to 4

Post by greffel » Mon May 18, 2020 10:35 am

Thanks for your interesting reply.
My problem did begin gradually, so I googled and found out about the B4 servo cover. Changed that part and the problem was still there. :(
Couple of weeks after that I flushed the transmission and I even added Liquid Molly pre flush before flushing it. (hoping fore a really nice clean flush)
So after the flush still the same problem, or maybe even worse. It has the worst delay shifting 3-4 on 30-40% throttle. If I accelerate hard the shift is a lot better, maybe even good.
Maybe I will try the CMA or contact Volvo and have a software update. Some people says that it will help.

Is is possible to log something i Vida to get a better idea of the problem ?

firstv70volvo
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Re: Volvo 2.5T AWD 2003 Automatic delay 3 to 4

Post by firstv70volvo » Mon May 18, 2020 12:08 pm

"If I accelerate hard the shift is a lot better, maybe even good."

To me this is potentially good news because it means it might be more of throttle/load line pressure related problem instead of worn discs. I would think if the discs were badly worn the slipping would get worse under a higher load not better. In this case the control module adaptation may help you out.

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