Thread: 9C1 Transmission Cooler on Grand Prix

Originally Posted by GTP131

Sure, that is possible... but instead of using factory lines, I would cut my own lines and run them. It would also require removing the fittings on the transmission and cooler and installing barbed fittings. Might as well just buy an aftermarket kit for $30.

Keep in mind also, that this is a pretty small cooler. In the 9C1 configuration, it has to share space in front of the condenser with a power steering cooler and oil cooler. It's only intended to be a supplementary cooler. The trans might actually run hotter in standalone.

If there is enough interest, though, I could try running it in standalone as another experiment.

You 97-03 Guys would have to use the factory lines and cut them anyway since your fittings have a check valve in them IIRC. And i know the 9c1 setup well since that is what i have. I run full standalone, and have been for years now, It speaks volumes that my GXP made it over 100K with the factory trans while most couldnt make it that far, With you guys im sure the benefits would be even greater.

Originally Posted by DirtDog

You wouldnt need to remove the factory fitting and lines from the transmission. Just cut the rubber section, slide a barbed fitting in there and add the new cooler

Exactly.

Originally Posted by Turbocharged400sbc

i still run the giant B&M megacoolers post OEM trans cooler.

our oem cooler is quite good, and it has 3/8ths fittings....though you later quick connect guys did get ****ed, thats what happens when the bean counters find a way to cut costs...even if it restricts flow over a standard 45*inv flare.

the oem cooler at least helps your trans get up to temp faster. though with the newer constant viscosity dex6 im sure thats not as much of an issue

04+guys didnt get ****ed at all we have no check valves in our line fittings at all, I made a writeup here http://www.grandprixforums.net/threa...ines-*Updated*

we can simply use whatever -6 out the trans case to whatever line and run like that, I have drilled out -6 port to -8 pushlocs on full 1/2 line to the 9c1 oil cooler as a trans cooler. which allows 1/2 fittings as well.

Originally Posted by 91parkave

You 97-03 Guys would have to use the factory lines and cut them anyway since your fittings have a check valve in them IIRC. And i know the 9c1 setup well since that is what i have. I run full standalone, and have been for years now, It speaks volumes that my GXP made it over 100K with the factory trans while most couldnt make it that far, With you guys im sure the benefits would be even greater.

Are you sure we are talking about the same 9C1 cooler? This is the little dinky one off of the 2000-2005 model Police Impalas.