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Can't Identify TH475 Transmission Part- 1986 Chevy P30 454- Please Help!


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GulfstreamSunsport
New User

Sep 27, 2015, 2:31 PM

Post #1 of 3 (1542 views)
Can't Identify TH475 Transmission Part- 1986 Chevy P30 454- Please Help! Sign In

I am having a problem identifying an unknown part for a TH475 Transmission I'm pulling apart on a 1986 Chevy P30 (454, 7.4L) It needs to be replaced and at first I thought it might be an accumulator piston but I don't find anything like it online and it has two pieces to it instead of just one as an accumulator piston has.

Here are the links to the photos I've uploaded to the forum.






gsferraro
Veteran

Sep 27, 2015, 4:10 PM

Post #2 of 3 (1530 views)
Re: Can't Identify TH475 Transmission Part- 1986 Chevy P30 454- Please Help! Sign In

The trans should be a THM400, The part looks like an accumulator that would go in the valvebody, the accumulator is one piece, the one in the pic is probably broken, is there a spring that you found as well? Gary
Actually depending on what rear seal it takes, it could be a 475 trans, but thm400 is the same thing.


(This post was edited by gsferraro on Sep 27, 2015, 4:11 PM)


Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Sep 28, 2015, 6:10 PM

Post #3 of 3 (1514 views)
Re: Can't Identify TH475 Transmission Part- 1986 Chevy P30 454- Please Help! Sign In

Does your wife know your rebuilding a transmission in her kitchen sink?...LOL





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