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Rebuilt 4l80e slipping in forward gears

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Old Jun 28, 2021 | 06:21 PM
  #21  
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From: Nitro Alley
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Which time-zone are you in?

I am GMT -5
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Old Jun 29, 2021 | 12:20 AM
  #22  
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Thanks @vorteciroc !! Sent you a private message with my contact details.


Did some more measurements, see readings in pictures.
I have three stops that looks low in the VB.

1,Lo/reverse checkball is at 14hg-in.
2,Reverse checkball at 12
3,Afl filter passage #20/5 at 14 hg-in. If only measuring the #5 channel blocking the filter out it still reads 14. Leak should be by the 2-3 shift valve? How it that assessed?

Could those be my reasons, seems fair according to the Sonnax instruction sheet?

Next challenge, the recommended Sonnax replacement checkball seats does only list for 1995-later fit. I have a 1991 case and VB. Any suggestions?

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