TH/350 Fittings question

I'm about to order the parts to replace the hard lines going to my ****** cooler with braided lines and fittings. Does anyone know the thread size for the ports on the side of a TH/350?
-Scott

 

1/8" Npt

 

Thanks!

 

hmmm..i've always used 1/4" NPT

 

its a straight cut pipe... doesn't taper like a regular pipe thread. If you tighten it too much it WILL crack the case.

I'd suggest using the br*** fittings in the case and adapting them to AN fittings. Aeroquip FCM2111 is 1/2-20 to -6AN (the br*** fitting is 1/2-20 I believe) that will adapt you from the trans to -6 line.

 

Mine has adapters, then 5/16 ( std., not -AN double flare) brake line for the hard lines.

 

This is how I did my 41 and it works great.

 

I'm also running the -6AN adapters to hard line. Lots O pressure in dem lines.

 

This is some solid advice. The thread is a 9/16-18 straight. Some use a -6 to -6ORB (o ring boss) fitting but that's still not correct. The T350 case does not have the groove for the o ring to sit in as they seal with a crush washer. So seeing as you already have the br*** adapter in there with the crush washer crushed you might as well keep it.
One other thing to add is you should use a teflon braided hose over the CPE (rubber) braided hose. The Teflon hose is rated for 450 degrees and the CPE is good for 250. Trans fluid is getting close to the max rating of the CPE hose and when you add some exhaust heat in the mix it's just a matter of time before you have problems.

I make fittings and hose ***emblys for a living. If you have any questions or need any thing feel free to give me a ring. Just say you are from the HAMB and I'll hook you up. contact info is in my profile.