Vacuum thing on IP in the way...

[T_F_E]

Hey everyone I am most of the way through my turbo project (using 6.5 parts) on my m1009. I just tryed to bolt the upper intake and my vacuum thing for the tranmission on the ip is in the way. Anyone have any suggestions?

 

[BIGdaddycatlin]

that part that is hitting is what down shifts the transmission when you push the peadal to the floor

 

[T_F_E]

I realize that, I just was wondering if anyone knew what I could do to over come that problem.

 

[BIGdaddycatlin]

the early mechanical 6.5"s might have a diffrent style kick down switch that would work

 

[T_F_E]

they had different tranmissions, that didnt use the same vacuum set up like a turbo 400.

 

[lavarok]

that part that is hitting is what down shifts the transmission when you push the peadal to the floor

The vacuum regulator controls shift points based on RPM. It is not a kickdown switch.

You can loosen the two bolts holding it and rotate it. This may give you some clearance but will affect your shift points.

If you adjust for clearance and notice hard shifting after wards, you can add an adjustable modulator on the side of the tranny ( vs. non adjustable ) to adjust your shift points down.

 

[T_F_E]

Ok thanks, where can I get an adjustable modulator?

 

[lavarok]

Almost any auto part store. All the replacement modulators I have bought have been adjustable, although I use the regulator ( the item which is in your way ) to adjust my shift points so I leave the modulators alone.

If you rotate the regulator as far forward as possible, you will end up with later shifting than you have now so the adjustable modulator can dial it back down if you dont like it. However, it may not be an issue so rotate it forward and try it out.

 

[T_F_E]

Ok i rotated it all the way forward and have plenty of clearance, I can even move it back a little bit. Thanks a bunch for your help!

 

[Cucvnut]

B&M makes an adjustable modulator for the Th400

 

[T_F_E]

So with an adjustable modulator you could ditch the entire vacuum setup?

 

[lavarok]

No, you need vacuum and you want that regulator working. The modulator just gives you another point of control. The vac line leaves the regulator ( item you rotated ) and goes into the modulator which is mounted in the hole on the side of your transmission.

However, as I pointed out - you may not even need to mess with the modulator. Go test drive the truck and see how she shifts. Adjust the regulator back some ( since you have clearance ) if it shifts too hard. Use the modulator only if you can't dial it in via the regulator.

 

[T_F_E]

Alright, thanks a bunch for the help!

 

[CUCV85]

​

Pro-King Transmission Modulator Valve
Part No. MD-48
Warranty: 1 YEAR REPLACEMENT IF DEFECTIVE
Can you ship it?: Yes
$11.99
TH350/TH350C/TH400; Black/Red Stripe; Small Modulator Replaces Large; 3 Speed

 

[kassim503]

How do you adjust the regulator? Mine shifts a bit too high for my liking

 

[CUCV85]

rock that regulator valave back toward the cab or forward toward front end. The modulator is a 2 min job. Back that little brass screw inside the modulator out a few turns 4 8 10 ! what ever you want. The more you back that brass screw out (flat tip screw driver) (small screw) The faster it will shift. Make sure you replace all the vacume lines on that truck, ours have all dry rotted and leak. Cheap hose and your finished.

 

[lavarok]

How do you adjust the regulator? Mine shifts a bit too high for my liking

Loosen the two bolts holding it to the IP and it will rotate in place.
Toward the cab to soften and toward the grille for later shifting.