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Old 02-09-2017, 07:12 PM   #123
demian5
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Join Date: Aug 2016
Location: Lake Forest, CA
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Re: 4L80E & TH400 Tech.

Quote:
Originally Posted by clinebarger View Post
The only thing needed is a parking pawl cup plug, Comes in every 4L80E/TH400/TH350/700R4/4L60E rebuild kit.

Use the Cup Plug to block the Reverse passage in the case. (the passage to the right of the Center Support Bolt) I recommend using some type of Retainer Compound on the OD of the cup plug & let it set overnight.
Is this a good thing to do if you have to pull the valve body for any reason?

I have to pull my VB to replace the plastic piston on the VB.

Any other suggestions while I am in there?

Its an 86 C20 with 57k OG miles. Never been apart. Shifts great, just no engine braking in 2nd only.
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Last edited by demian5; 02-09-2017 at 07:20 PM.
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