08 gmc 4l80e

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brewjunior
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08 gmc 4l80e

Post by brewjunior » Tue Sep 25, 2018 9:26 am

08 gmc 3500 van 4l80e. repeat burn up of direct clutches. new piston, seals, center support bushing, sealing rings, clutches and steels. started burning direct back up in 15 minutes. seems to air check fine. also can you plug the case and leave out center seal like old 400 ?

carod
Posts: 156
Joined: Wed Aug 10, 2016 6:53 pm
First Name: Rod
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Location: Calgary, Alberta

Re: 08 gmc 4l80e

Post by carod » Tue Sep 25, 2018 11:40 pm

I have done the dual feed modification on a 4L80E several times with no pproblems. Do you have good pressure rise.
How were the ingagements and shifts when you road tested?

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