Allison 5sp: Lb7 Ppe stage 5 allison surging at shift from 3-4

[Ethanburton28]

My tranny seems like it's slipping from shift 3-4 at wot. When it shifts it's like it throws it into neutral and hits 4k then hits 4th

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[Ethanburton28]

https://youtu.be/PN2E1cQ8nVU

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[Mike L.]

Are we suppose to guess the rest of the info?

 

[Ethanburton28]

2003 lb7 50hp injectors fass lift pump efi live ppe boost valve and stage 5 trans with percison converter

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[Mike L.]

Who built the trans? Is the converter locked when this happens?

 

[JoshH]

How long ago was it built? Did it just start doing this, or did something happen to cause it to start?

 

[Ethanburton28]

The trans was built back in 2004 I bought it off a guy that put about 15 sled pulls on it everything seemed to be ok with it when I had it put in a week ago. I've put 800 miles on it to Ohio and still hard shifts so I figured if I reflashed the tcm with the same tow tune that was on the stock tranny it would help mellow out the shifting and when I got on it it started doing what it is doing now

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[Mike L.]

Time to go through it again.

 

[Ethanburton28]

Time to go through it again.

What all pids do you turn on to help determine the problem?

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[Robby05]

Where are you located?

 

[Ethanburton28]

Right now I'm am staying in sunbury ohio right by columbus

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[Ethanburton28]

The torque converter is only locking 5th

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