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Old 09-10-2025, 11:56 PM   #1
TheBrightSide
 
Drives: 2010 Chevy Camaro 2SS coupe (MT)
Join Date: Jan 2024
Location: Sacramento, CA - USA
Posts: 371
TR-6060: stock cooler/radiator fitting sizes?

Hey guys, posting again to inquire about more specific information on the factory Tremec TR-6060 manual trans, as well as the fittings that go into the trans and radiatior, for the trans oil cooler setup to work. I'm looking to get rid of the stock, factory hard line setup, with the "quick-disconnect" setup that GM uses, with it's wire clips.

After removing the trans from my car for the first time in a long time, and looking over things I could "improve" or make more "efficient"; I found that I didn't really like how the factory GM fittings with the hard lines worked. There's no o-rings, and when the hard lines aren't all mounted up, they flex around and are pretty loose.

They haven't leaked on me at all, although I haven't researched if that is a common occurrence or not. I'd just rather maybe get some braided stainless steel trans cooler lines, with some 90-degree fittings (male to male) to go to the trans, and just regular AN (male to male) fittings to the radiator. I figured I could also potentially sheathe the aftermarket, stainless steel trans cooler lines, with the typical fiberglass or titanium heat-resistant material that I've used before, on things like my aftermarket braided clutch line, for example.

I've looked up some sources and kits, and a lot of them say -6 AN for the "size", but I can't tell what the thread pitch/size are, for the actual threads inside of the transmission and radiator themselves. I got an aftermarket trans cooler line kit, and it has a bunch of male to male -6 AN fittings, but most of them are either 1/4" or 3/8" NPT threaded (going either into trans or radiator).

If anyone knows all of the thread pitch sizes for the trans and radiator trans cooler fittings, please let me know. I would highly appreciate it. When I have time, I will go ahead and just take the fittings out again, from the trans and radiator themselves, to check. I originally assumed they were -6 AN ORB to -6 AN male fitting setups, for going aftermarket.
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