10R80 5 - 6 flare in normal driving

[schmeky]

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.

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[Proshop]

Does it do it all the time or when the tranny isn’t warm yet??

 

[Firsttexan]

Where did the term flare come from? Never heard it till I came here.

Are you saying, your transmission slips?

 

[andrewtac]

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]

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.

 

[andrewtac]

I always described it as a shift that is slipping. Usually gets worse with power.

 

[andrewtac]

Flare isn't unique to the 10r80, I've had it in other automatics.

 

[andrewtac]

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.

 

[schmeky]

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.

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