Engine/Transmission (1994 - 1998) pacbrake c14000 and c14000at

[jpogue]

I recently bought a pacbrake, the website I bought it from did not ask if my truck was auto or not. Received pacbrake today and its a c14000 for a standard. In the installation instructions it says not to use this model with auto transmission it says to use the c14000at for an auto trans. I bought the 60lb springs and I have an ATS trans. with lockup controller box. Will this one work or do I need to send it back and get the right one. What is the difference between the two.



jpogue

 

[MonkeyMagic]

The differences, according to Pacbrake when I spoke with them, was the size of the orifices in the valve inside the brake... the flat plate that moves towards the closed position when the brake is applied. They told me that if I bought and the AT version, but ran it on a manual truck I could put a bolt in the one of the two holes, or weld it (forget which hole)... also said if I bought the non-AT version, and ran it on a auto truck, that I could drill out one of the holes to a larger size...



I would give them a call... they were very helpful. I spoke with TJ Coulter (tj@pacbrake.com) via email.



The orifices sizes control the amount of back pressure.



Be sure and tell them you have the upgraded transmission... you might be able to run the non-AT version with that transmission and have no issues... or you might call ATS as well. . they might know about the amount of back pressure at the engine with respect to what their transmission can handle.

 

[jpogue]

Thanks Monkey. I have read some other posts about the hole size, and I will call pacbrake monday morning. I really don't want to have to return the pacbrake and wait for another one. If this one will work I'll use it. Like I said I have the 60# exhaust springs and the lockup controller that is supposed to work with the pacbrake. If I only have to drill a hole that's fine.

jpogue

 

[Dieseldemon]

The best way to find out is to put a gauge on it and check the pressure it makes I just installed an AT on a std trans and it had max pressure of 50 lbs after plugging the 1 orfice.

 

[jpogue]

Thank you for the input guys. MonkeyMagic I emailed TJ and he told me to plug up the big hole and leave the beveled hole open. I am more intimidated by changing out the springs than anything else. I have the overhead spring compressor and I have a friend to help me tackle the project this weekend. I have bad dreams about dropping a valve into the cylinder or dropping a valve keeper into the block. The instructions are clear but I just get nervous about projects like this. I don't wrench a whole lot like I used to.