TH400 Transmission: What is this part called?

"Luc - The Acadian Oppo" (luc5)
06/27/2016 at 11:49 • Filed to: PROJECT BIG STEEL

Yesterday I was working on my trusty old pickup hoping to do a header instal. First order of business what to pick up the sawzall and go to work on the old rusted exhaust. once I finally cut thru the first pipe I accidently bumped this brass-ish diaphragm looking piece with the saw and now I’m leaking tranny fluid all over the place.

I need to replace this but I don’t even know what it is. Any help would be greatly appreciated.

DISCUSSION (14)

crowmolly > Luc - The Acadian Oppo
06/27/2016 at 11:51

TH400 vacuum modulator. You may need to look up how to adjust the new one.

RazoE > Luc - The Acadian Oppo
06/27/2016 at 12:03

That right there is a gen-u-wine Do-hickey.

crowmolly > crowmolly
06/27/2016 at 12:09

Shit, just remembered. I think it’s a push-in. You may be able to replace the o-ring and be good to go if you didn’t bend it.

lone_liberal > crowmolly
06/27/2016 at 12:28

Yep, push in with a bracket that holds it in place. A new one is $20 so I’d just go ahead and replace it.

just-a-scratch > RazoE
06/27/2016 at 12:41

I didn't know Ginuwine manufactured do-hickeys. I suppose he would be into "Pony" cars.

https://en.wikipedia.org/wiki/Ginuwine

Luc - The Acadian Oppo > crowmolly
06/27/2016 at 12:42

I actually hit in on the front side and it pierced it. Pretty flimsy metal on that thing. Found what I was after at Rock auto. But thanks without you I would of been searching for a while because I had no clue where to even start.

crowmolly > Luc - The Acadian Oppo
06/27/2016 at 12:46

No worries dude, glad it’s an easy fix.