Is this normal?

Jonno02 · Apr 23rd, 2022, 20:42

Hi guys,

Just looking for a little help. I have a 2019 S90 and have noticed (most prominently in second gear) when I accelerate, the car will slightly drop revs even with constant throttle. After a second or two, the revs begin to rise again.

You can see at around 6 seconds in the video the revs dropping even though I'm still on the accelerator.

Car also makes a bit of a clunk when shifting from reverse > neutral > drive. Can feel the clunk too.

Any help greatly appreciated.

VIDEO LINK

Thanks,
Jonny

Abz1 · Apr 24th, 2022, 12:55

I have the same model and year. Can't say I have noticed the issues you describe however I will give this more attention and let you know if I experience this. Is it happening in full auto or when you are manually selecting gears as I have never used the manual shift mode.

big square car · Apr 24th, 2022, 18:44

I tried this out this afternoon with both paddles and gear lever but this problem was not evident. Maybe you should consult your dealer. Are you still under guarantee? My car is a 2018 V90 R Design D4

MikeGMT · Apr 24th, 2022, 19:51

I have a feeling this may be the ECM/TCM reigning back the power momentarily while using the manual feature. I had a previous car which did the same in the low gears, lots of torque going through the FWD. Does the same occur when driving with the same throttle in fully auto?
The 'clunk' might be resolved with a transmission software revision.

Abz1 · Apr 25th, 2022, 16:23

I checked this out with my car today but could not replicate the issue .My car is a 2019 S90 D4 Inscription Pro.

Apr 23rd, 2022, 20:42	#1
Jonno02 New Member Last Online: Nov 26th, 2023 21:53 Join Date: Apr 2022 Location: Glasgow	Is this normal? Hi guys, Just looking for a little help. I have a 2019 S90 and have noticed (most prominently in second gear) when I accelerate, the car will slightly drop revs even with constant throttle. After a second or two, the revs begin to rise again. You can see at around 6 seconds in the video the revs dropping even though I'm still on the accelerator. Car also makes a bit of a clunk when shifting from reverse > neutral > drive. Can feel the clunk too. Any help greatly appreciated. VIDEO LINK Thanks, Jonny

Apr 24th, 2022, 19:51	#4
MikeGMT VOC Member Last Online: Jun 21st, 2024 21:43 Join Date: Jul 2012 Location: Kingston upon Hull, E.Yorks.	I have a feeling this may be the ECM/TCM reigning back the power momentarily while using the manual feature. I had a previous car which did the same in the low gears, lots of torque going through the FWD. Does the same occur when driving with the same throttle in fully auto? The 'clunk' might be resolved with a transmission software revision. __________________ Volvo V90 D4 CC Pro : Osmium Grey : P* ____________________ It’s a cold day in Wagga Wagga ____________________ Who Knocks the Knockerupper Up

Apr 24th, 2022, 12:55	#2
Abz1 New Member Last Online: Yesterday 09:54 Join Date: Apr 2022 Location: Aberdeen	I have the same model and year. Can't say I have noticed the issues you describe however I will give this more attention and let you know if I experience this. Is it happening in full auto or when you are manually selecting gears as I have never used the manual shift mode.

Apr 24th, 2022, 18:44	#3
big square car Member Last Online: May 30th, 2024 16:30 Join Date: Aug 2012 Location: hillsborough	I tried this out this afternoon with both paddles and gear lever but this problem was not evident. Maybe you should consult your dealer. Are you still under guarantee? My car is a 2018 V90 R Design D4

Apr 25th, 2022, 16:23	#5
Abz1 New Member Last Online: Yesterday 09:54 Join Date: Apr 2022 Location: Aberdeen	I checked this out with my car today but could not replicate the issue .My car is a 2019 S90 D4 Inscription Pro.

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