Replace Transmission Modulator

grinders_18 · January 28, 2008, 05:15:26 PM

How do I remove/replace the transmission vaccum modulator? The Service Manual Suppliment only shows a description of the part, not the process for removing and replacing it.

TGPvsTIII · January 28, 2008, 07:31:21 PM

there is a small bracket next to it with a bolt that is about 1/2 inch wrench size. remove the bolt and slide the retaining braket out and pull the vacuum modulator out. I wet the new O ring with either trans fluid or vasoline and slide the new one in. Install retaing braket and bolt.
Tim

jimmy · January 28, 2008, 08:00:07 PM

Yep exactely, I was looking in my shop manual when Tim answered . But Krenz can you PM me to a question I have. Did you figure out if the Bolt pattern 5-114.3 work?Thanks

grinders_18 · January 28, 2008, 08:13:15 PM

Alright thanks guys! I'm either gonna go do this quickly tonight if it can be done in less than half an hour, or wait till tomorrow after work. Another thing: what all needs to be removed to actually get ahold of that valve, since there's wires and hoses and all of God's children standing in front of it? Would I be better off going in from underneath?

grinders_18 · January 28, 2008, 08:22:27 PM

Is the bolt on the left side or the right? I can't see ANYTHING but the nipple sticking out and a tiny portion of the body...

jimmy · January 28, 2008, 09:02:02 PM

LEFT ;)

grinders_18 · January 29, 2008, 03:43:01 AM

Thanks! Any tips on how the hell to get in there? Remove the loxer intercooler pipe and air filter, I know, but is there anything else I could remove to make it more accessible?

R Dubya · January 29, 2008, 04:26:24 AM

IIRC the turbo oil drain line can be troublesome here, especially if it's stock or brand new. I think I removed mine for this process.

grinders_18 · February 01, 2008, 02:45:55 PM

Ok, so I got the modulator changed. WOW! Shifts excellent! Still confused though, since he did not install the check valve, but again mated the throttle vaccum line with the trans modulator. I called him and asked him why, and he said that the auto parts store says "It's adjustable and has no need for a check valve since there's a check valve type thing built in"? Sounds right to anyone? All I know is he said the one he took out didn't have a diaphragm-type thing inside it, and this one does. This thing shifts like almost brand new!

TGP Nick · February 01, 2008, 06:45:17 PM

It still needs a check valve man. The check valve is there to protect the modulator by bleeding off boost.