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XC90 '02'15 General Forum for the P2-platform XC90 model

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Engine noise and odd Transmission behaviour

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Old Jul 12th, 2021, 19:12   #21
AdzXC
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If the parking brake is not releasing completely or I have a sticking caliper (not noticeable under braking and no pull), do you think this could create enough drag to make it feel like the engine is over revving and the transmission is struggling? When it cruising in 4th it does feel like the RPM isn't high enough for road speed. Also makes sense that the issues are amplified when at full temperature if the brakes ect are expanding under heat.
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Old Jul 13th, 2021, 06:01   #22
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Originally Posted by AdzXC View Post
If the parking brake is not releasing completely or I have a sticking caliper (not noticeable under braking and no pull), do you think this could create enough drag to make it feel like the engine is over revving and the transmission is struggling? When it cruising in 4th it does feel like the RPM isn't high enough for road speed. Also makes sense that the issues are amplified when at full temperature if the brakes ect are expanding under heat.
I do not think so.

But easy for you to confirm. Go for a 15 minute drive, then stop and lay your hand on the center of each wheel. With normal brakes, they should all feel about the same temperature.

If one wheel is noticeably warmer than the others, then the brakes are dragging/rubbing, which of course will also cause higher fuel consumption.
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Old Jul 19th, 2021, 12:26   #23
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So, just got off the phone with the local Indy who has driven the car and confirm that the transmission is not behaving as it should. Its been plugged in and registered a Transmission fault " gear range too short" (or something to that effect) and something to do with the differential. There is a software upgrade available for the transmission but they have phoned Volvo for more info on the fault before loading it in - I'll let you all know the outcome.
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Old Jul 20th, 2021, 08:56   #24
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Morning All... Got the car back and it has come back with fault code P089500 " Shift time too Short" and also a fault on the differential module control pump. The recommended fix by my Indy is.. ATF change, software update, adaptions cleared, transmission teaching and if that doesn't work it'll be a transmission strip to investigate further. The car is 2.5 months into purchase and as this is the second major fault with 2 repairs being carried out on the first one I am within my rights to reject the car but this is a long process which will likely leave me without a car for weeks and possible out of pocket so I am potentially open to allowing another repair via the dealer.

Does anyone know the success rate of getting the transmission back to good working order using the above method or am I better off rejecting?
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Old Jul 20th, 2021, 11:04   #25
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In my experience of a much older (2003) xc90 is that a good flush etc will greatly improve matters if not fix completely.

Mine is probably a much more problematic box and has had its issues in the past, but (touch wood) after two complete flushes in my ownership the last four years, the gearbox works fine.

I have seen said that keeping the transmission oil fresh at intervals should keep the gearbox fine.

Nb, mine is now close to 180k miles.

So I would go with the service as described.

Hope this helps..

John l
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Old Jul 21st, 2021, 08:39   #26
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The dealer are trying to get the transmission repaired with the updated software and adaptions cleared but there is also an issue with the differential. This car is immaculate inside and out but appears to have had a hard life in the 75K miles its done. I'm hoping the issues can be resolved as it's going to be a pain to get the money paid back.
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Old Jul 21st, 2021, 12:47   #27
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Hi, so I am going ahead with the software upgrade and ATF change and adaptions however, the Transmission specialist cant do the software upgrade so the dealer are having it done at my Volvo Indy. Does anyone know if they can do the ATF change & adaptions before the software update or does this have to be done first?
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Old Jul 22nd, 2021, 06:16   #28
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No point doing adaptations before any software update.
You need to do them after the software update.
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