AN Fittings for TH350 and Cold Case Radiator

tmenia · Jul 21, 2025

I'm having such a hard time getting aftermarket aluminum trans tubes to not leak at the trans that I want to convert to SS braid and AN fittings. Problem is I can't find AN fittings or adapters for the 5/16" inverted flair fitting Cold Case tells me is in the rad. I tried Summit and Jegs and they don't have anything that will work.
If anyone can help with what to use at the trans and rad ends for AN I'd appreciate it. Thanks for the help!

dhutton · Jul 21, 2025

I think this is what you need on the radiator.

https://www.summitracing.com/parts/vpe-16425

SoCal805 · Jul 21, 2025

They make inverted flare to AN adapters. Search for the 2 sizes you need like the 1/2"/-6 posted above

5/16 inverted to ?AN for whatever size AN trans cooler lines you are usung

dhutton · Jul 21, 2025

I think this is what you need for the transmission.

https://www.summitracing.com/parts/ear-940006erl?seid=srese1&gclid=EAIaIQobChMIyNeRg_POjgMV0F1_AB3s2DjFEAQYASABEgLxIPD_BwE

dhutton · Jul 21, 2025

You will likely need 45 degree AN hose ends at the transmission.

tmenia · Jul 21, 2025

Thanks guys for the quick replie. But I'm seeing 1/2" and 3/8" inverted flares on the rad side online but can't find 5/16" after searching. Cold Case tech support didn't have any ideas either. If anyone finds a 5/16" pls let me know. I'm also wondering if an NPT thread on the rad side, if it doesn't bottom out, will work. I can't image someone hasn't run braided lines between a TH350 and a Cold Case rad.

tmenia · Jul 21, 2025

dhutton said:
I think this is what you need for the transmission.

https://www.summitracing.com/parts/ear-940006erl?seid=srese1&gclid=EAIaIQobChMIyNeRg_POjgMV0F1_AB3s2DjFEAQYASABEgLxIPD_BwE

Thank you for the charts. I don't even see 5/16" listed. That's what Cold Case told me but I'm going to verify that on the rad myself.

tmenia · Jul 21, 2025

dhutton said:
You will likely need 45 degree AN hose ends at the transmission.

You're right I'll get those for sure.

dhutton · Jul 21, 2025

tmenia said:
Thank you for the charts. I don't even see 5/16" listed. That's what Cold Case told me but I'm going to verify that on the rad myself.

The thread sizes are what they are listed by, not the tube diameter. I gave you the correct parts afaik.

bhodgdon400 · Jul 22, 2025

i'm running -6 AN from TH350 to cold case radiator.....i don't remember having a hard time finding the fittings but its been a few years. i know it can be done easily, just don't have a link to help you with

AN Fittings for TH350 and Cold Case Radiator

tmenia

dhutton

SoCal805

dhutton

dhutton

tmenia

tmenia

tmenia

dhutton

bhodgdon400

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