What threads are the cooler fittings?

[Mogman]

What threads are actually in the aluminum housing for the cooler lines? I need to convert them to 5/8 JIC

 

[THEFERMANATOR]

For which trans. I know the cooler ports in the bellhousing are a -8 AN for the 01-early 03 trucks, and -10 an for 03+. Cooler fittings at the radiator and aux cooler varied.

 

[Mogman]

Sorry, brain fart it is an 08 6 speed Allison 1000, I need to know what the threads in the aluminum case are so I can remove the fittings that use the clips and replace them with 5/8 JIC or 10-AN for you aircraft nuts.

 

[Mike L.]

Sorry, brain fart it is an 08 6 speed Allison 1000, I need to know what the threads in the aluminum case are so I can remove the fittings that use the clips and replace them with 5/8 JIC or 10-AN for you aircraft nuts.

7/8 by 16

 

[Mogman]

7/8 by 16

THANKS, does it have an oring? like this ORB fitting?

EDIT! It looks like 7/8 SAE is 14 TPI.......

 

[Mike L.]

O ring is for the cooler side only.

 

[THEFERMANATOR]

Yes, it's a -10 with an o-ring where the fitting goes into the case iirc. Just make sure and use a hose that can handle the heat. I used some 275 degree rated hose on mine and they kept leaking from the heat breaking the hose down everytime I towed something. Ended up going with some 325 degree rated hose.