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Okay guys need help on getting car to not cut power at 1-2 shift

Robertp

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the car is bone stock it’s a 18 400a 10speed

Last weekend car went 11.88 and 11.86 with my heavy ass driving car shifted perfect in drag mode car has a 26.9 mickey Thompson radial shifted excellent
So car 81 this week with wife driving car was faster speed by far but u could here it killing the power on the 1-2 so it took ever to recover
We would crank car then once in drive go to drag mode then hold traction button to disable advance track what are we doing wrong sound like it may have been tagging limiter just barely but it was Definetly closing throttle body

Ideas?
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Zinc03svt

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I would recommend unplugging all nannies by airbox. Even with Advancetrac disabled at the button the car can intrude on your fun.
 

growler

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I had same issue on 3-4 passes.... it was over revving when tires would break lose on 1-2 shift and hit rev limiter...I guess the tranny cant compensate enough when tiresbreak lose to grab another gear fast enough...once I got more tire it never happened again
 

brucelinc

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I agree with Growler about the rev limiter. I have had it happen a couple of times....but once even with drag radials. Low gear is very short and it revs quickly. It can bump up against the rev limiter under some conditions. I am not sure if the tires break loose or it just revs so quickly that the transmission sometimes cannot make the change fast enough. The speed of the shift might have something to do with trans temperature....either a bit over heated or even a bit too cool.
 

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Zinc03svt

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Stock tuning, yep 7500 rev limiter very possible. Tune takes care of this btw.
 

LETHAL

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Pulling the connection at the airbox lost me two mph in the 1/8th on 28x10-17 Hoosiers.
 
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Robertp

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Yeap same with mine drag mode does not work when u pull this says it’s drag mode but it’s in normal mode
 

Zinc03svt

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Yeap same with mine drag mode does not work when u pull this says it’s drag mode but it’s in normal mode
Must only affect drag mode (optioned) cars. Makes sense as the line lock goes away too.
 

LETHAL

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Yep... Didn't even realize but yeah, that is right. Lost it's nice hard shift and time/speed.

Wasted about six runs that way.
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