IPD sale Volvo Parts
Did you know? 🤔
Logged in users can get email notification of topic replies Log in or register (free).
Amazon Link Buy your stuff using this and it helps MVS!

Troubleshooting shift flare with the help of an Arduino Due

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

2001 - 2007 V70
2004 - 2007 V70 R
2001 - 2007 XC-70
2001 - 2009 S60
2003 - 2007 S60 R

User avatar
vtl
Posts: 1405
Joined: Thu Aug 16, 2012 1:35 pm
Year and Model: 2005 XC70
Location: Boston
Has thanked: 3 times
Been thanked: 21 times
United States of America
vtl

Troubleshooting shift flare with the help of an Arduino Due

Post by vtl » Tue Apr 30, 2019 1:17 pm

Flare is when RPM spikes, not drops (reduced torque window is gone, engine starts to push, but the clutches in transmission are not engaged yet). What you see and feel is a torque converter lockup: starting from 3d gear transmission first shifts with open TC then a second or two later it gradually locks the converter (SLU modulates the lock) so it has a direct gear now, without torque transferred through fluid. It does it in 3d, 4th and 5th gears.

It's best to display gear, SLT/SLS/SLU and S1-5 solenoids in VIDA when you diagnose your transmission. VIDA has a limitation of how many of them can be displayed at the same time. My "mini-DiCE" does not have that limitation, you can clearly see what transmission is doing:

Image

And a ton of other information from ECM, DEM, CCM, REM.
These users thanked the author vtl for the post:
XC70Rider


2002 V70 (sold)
2005 XC70 (Telos Road took it. Did a chassis swap...)
2016 XC60

User avatar
oragex
Posts: 4092
Joined: Fri May 24, 2013 6:20 am
Year and Model: S60 2003
Location: Canada
Has thanked: 77 times
Been thanked: 151 times
Contact:
Canada
oragex

Re: Genuine Volvo ATF is NOT Mobil 3309...

Post by oragex » Tue Apr 30, 2019 1:44 pm

.
What is this display ?
Image


2003 2.4i S60 automatic 125k miles
DIY Volvo repairs videos https://www.youtube.com/playlist?list=P ... s0FSVSOT_c

User avatar
vtl
Posts: 1405
Joined: Thu Aug 16, 2012 1:35 pm
Year and Model: 2005 XC70
Location: Boston
Has thanked: 3 times
Been thanked: 21 times
United States of America
vtl

Re: Genuine Volvo ATF is NOT Mobil 3309...

Post by vtl » Tue Apr 30, 2019 1:48 pm

oragex wrote:
Tue Apr 30, 2019 1:44 pm
What is this display ?
My hobby project: https://github.com/vtl/volvo-ddd/


2002 V70 (sold)
2005 XC70 (Telos Road took it. Did a chassis swap...)
2016 XC60

User avatar
oragex
Posts: 4092
Joined: Fri May 24, 2013 6:20 am
Year and Model: S60 2003
Location: Canada
Has thanked: 77 times
Been thanked: 151 times
Contact:
Canada
oragex

Re: Genuine Volvo ATF is NOT Mobil 3309...

Post by oragex » Tue Apr 30, 2019 3:35 pm

This looks great. Would make a nice item to sell on Ebay & Volvo forums

oragex wrote:
Tue Apr 30, 2019 1:44 pm
.
What is this display ?
Image


2003 2.4i S60 automatic 125k miles
DIY Volvo repairs videos https://www.youtube.com/playlist?list=P ... s0FSVSOT_c

User avatar
matthew1
Site Admin
Posts: 9642
Joined: Sat Sep 14, 2002 11:03 am
Year and Model: 850 T5, 1997
Location: Denver, Colorado, US
Has thanked: 326 times
Been thanked: 122 times
United States of America
matthew1

Re: Troubleshooting shift flare with the help of an Arduino Due

Post by matthew1 » Fri May 03, 2019 9:47 pm

PSA -> If you want one of these, follow this Arduino Due for Volvo P80 topic.


Help keep MVS on the web -> click sponsors' links here on MVS when you buy from them.
Also -> Amazon link
. Click that when you go to buy something on Amazon and MVS gets a kickback.

1997 850 T5, MSD ignition coil, Hallman manual boost controller, injectors, R bumper, OMP strut brace [gone]
2004 V70 R [gone]

Post Reply