Can a C6 operate without the vacuum pump?

[6.9poweredscout]

got a 6.9/C6 off my friend that runs sweet. thinking of putting it in the '73 1310 frame i have and throwing my '52 IH cab on it for a lowered dually rat rod..... butttt it's manual brakes and steering and i plan on just running a 1 wire GM alt. is there anyway to convert a C6 to cable kick down? or will a SD vacuum pump poll enough to let the trans shift?

 

[HammerDown]

Nope

 

[spg]

You could convert it to a manual valve body. Contact me for details.

 

[Wicked97]

Manual valve body or an electric vacuum pump. Not the little super duty one.

 

[idiabuse]

I use a reverse manual valve body in mine, beats the hell out of the faulty OEM auto VB.
Will the lack of vacuum hurt the C-6? NO Will it hurt your feelings to drive it shifting it all the time?
I leave mine in 3rd gear all day long even when I come to a complete stop. As long as I dont need to
hurry to keep up with traffic I leave it in third at a full stop.


Javier

 

[typ4]

they make a cable control to replace the modulator . used them on perkins powered tugs all the time. dont know who made them but sure wish I had one now for my next project.

 

[Dave 001]

I'm guessing the engine has no accessory brackets? You'll need alternator brackets to mount an alternator, so go to a salvage yard and get alternator & vacuum pump brackets. Seems like the easiest fix to me.

 

[Dave 001]

That's interesting. I wonder what a Ford Power Products dealer could tell me about such a set-up. I'll have to stop in at the one near me and ask questions.

they make a cable control to replace the modulator . used them on perkins powered tugs all the time. dont know who made them but sure wish I had one now for my next project.

 

[6.9poweredscout]

The vaccum pumps are so prone to failure I'd rather not waste money on one. Ideally I'd like just an 1 wire alternator.

 

[Dave 001]

The vaccum pumps are so prone to failure I'd rather not waste money on one. Ideally I'd like just an 1 wire alternator.

While I can't say that I've never seen a vacuum pump fail, I never thought of them as failure prone. Anyway, if it's not a daily driver and you don't mind manually shifting it, I would use a manual valve body as others have suggested. They're relatively easy to install.

If you don't want to manually shift it, install a small 12v. vacuum pump and a reservoir tank to hold a little volume. You will still need to have a functioning VRV.

 

[6.9poweredscout]

the MVB sounds cool, never really heard of one. like a stick without the clutch. my friend has a ratchet shifter he'll give me too.

 

[itsacrazyasian]

use a 3g alterator in it and convert it to 1 wire or self excitation.

 

[Darrin Tosh]

So with a Manual Valve Body, you can do away with the Vacuum Modulator as well as the VRV? I have been wanting to go with a MVB for a while since I always shift it manually anyways, so getting rid of the vacuum stuff is just a bonus! That and a TCI Maximizer Diesel Torque Converter has been on my to do list for a while,...

 

[IDIDieselJohn]

Doesn't the vacuum modulator on the C6 also control line pressure???

 

[Dave 001]

Doesn't the vacuum modulator on the C6 also control line pressure???

If I remember correctly, when you install a manual valve body kit, the control line pressure no longer varies with load but remains high.