Sponsored

10R80 5 - 6 flare in normal driving

schmeky

Well-Known Member
Joined
Apr 7, 2019
Threads
55
Messages
716
Reaction score
730
Location
West Monroe Louisiana
First Name
David
Vehicle(s)
2018 Mustang GT
Just over 20K absolutely trouble free miles on my 2018 GT, nearly 6K with boost. Recently my 10R80 started exhibiting a flare when shifting from 5th to 6th under light throttle in normal driving.

I used my Ngauge to delete the KAM (Keep Active Memory) and I re-flashed the tune originally supplied from my tuner (Wengerd Performance).

Problem disappeared. I am posting this in case this happens to someone else.
Sponsored

 

Proshop

Well-Known Member
Joined
Jun 7, 2021
Threads
18
Messages
2,340
Reaction score
2,523
Location
Florida
First Name
Billy
Vehicle(s)
2021 Ford Mustang GT
Does it do it all the time or when the tranny isn’t warm yet??
 

Firsttexan

Well-Known Member
Joined
Sep 7, 2021
Threads
16
Messages
1,214
Reaction score
1,032
Location
USA
First Name
Mike
Vehicle(s)
2011 GT500 '19 GT PP1 '13 GT500, 98 GT, 92 LX 5.0
Vehicle Showcase
1
Where did the term flare come from? Never heard it till I came here.

Are you saying, your transmission slips?
 

andrewtac

Well-Known Member
Joined
Feb 24, 2021
Threads
58
Messages
1,132
Reaction score
578
Location
TX
First Name
mark
Vehicle(s)
F250. 2020 GT 400A
Where did the term flare come from? Never heard it till I came here.

Are you saying, your transmission slips?
I thought flare was during shifts, and slipping is when in gear.
 

Firsttexan

Well-Known Member
Joined
Sep 7, 2021
Threads
16
Messages
1,214
Reaction score
1,032
Location
USA
First Name
Mike
Vehicle(s)
2011 GT500 '19 GT PP1 '13 GT500, 98 GT, 92 LX 5.0
Vehicle Showcase
1
I thought flare was during shifts, and slipping is when in gear.
I honestly don't know. It's a new term for me. And the 10R80 trans is a new experience unto itself.

I could use a definition.
 

Sponsored

andrewtac

Well-Known Member
Joined
Feb 24, 2021
Threads
58
Messages
1,132
Reaction score
578
Location
TX
First Name
mark
Vehicle(s)
F250. 2020 GT 400A
I always described it as a shift that is slipping. Usually gets worse with power.
 

andrewtac

Well-Known Member
Joined
Feb 24, 2021
Threads
58
Messages
1,132
Reaction score
578
Location
TX
First Name
mark
Vehicle(s)
F250. 2020 GT 400A
Flare isn't unique to the 10r80, I've had it in other automatics.
 

andrewtac

Well-Known Member
Joined
Feb 24, 2021
Threads
58
Messages
1,132
Reaction score
578
Location
TX
First Name
mark
Vehicle(s)
F250. 2020 GT 400A
It can happen in any transmission. These transmissions have an electronic valve body so we are taking about a software problem causing it.

When a mechanical valve body transmission flares it’s generally time to rebuild.
Electronic control but still has fluid in it. I had one go out really quickly recently, builder suspected something in the fluid (from my lines, the rebuild, converter, etc) got in the valve body.
 
OP
OP
schmeky

schmeky

Well-Known Member
Joined
Apr 7, 2019
Threads
55
Messages
716
Reaction score
730
Location
West Monroe Louisiana
First Name
David
Vehicle(s)
2018 Mustang GT
What BlackandBlue said is spot on.

A flare is when there is a split second free rev between gears. I built many transmissions back in the early 80's and 90's, from vacuum modulated to electronic controlled.

The clutches/planetaries/sun gears/etc. are the "muscle" of the trans.

The valve body and electronics are the brain.
Sponsored

 
 




Top