transmission line fittings what size?

[jhacking]

what size are the fittings to the radiator and the metal pipe fittings from the trans.I am looking at cleaning up those ugly metal lines with maybe some braided ones.

 

[jwaller]

5/16

 

[jhacking]

on those fittings sizes in summit they have 4AN 6AN 8AN which one of these do i need.As for 5/16 is that NPT. i am wondering if that is what you meant Thanks

 

[myclone]

Lines are 5/16" OD. The braided line size you need is -6. The threads in the trans (NOT the brass adaptors.. the trans case itself) is NPT.

As for the fittings in the radiator I think they are NPT but a diff thread pitch (there is an "offical" name for it but I cant recall what it is). Its the same type thread/pitch as brake lines only bigger.

 

[4C FED]

On 2002-02-07 09:04, myclone wrote:
Lines are 5/16" OD. The braided line size you need is -6. The threads in the trans (NOT the brass adaptors.. the trans case itself) is NPT.

I took my fittings out, cause I wanted to switch to braided steel, and it doesn't look like they are tapered NPT.
Maybe a straight NPT?

 

[myclone]

On 2002-02-07 10:23, 4C FED wrote:

On 2002-02-07 09:04, myclone wrote:
Lines are 5/16" OD. The braided line size you need is -6. The threads in the trans (NOT the brass adaptors.. the trans case itself) is NPT.

Lemme get back to VA and I'll pull some out of a 700R4 I got laying around to see.. I've had them out years ago and and was going by memory. We ALL know how bad mine is (CRS).

I took my fittings out, cause I wanted to switch to braided steel, and it doesn't look like they are tapered NPT.
Maybe a straight NPT?

 

[jwaller]

all are regular 5/16...they are all flair fitting there are no pipe fittings unless you are talking about the brass one inside the trans...I dont know what the hell that one is..

 

[4C FED]

Yeah, the threaded part that goes into the tranny is the one I'm asking about.

 

[Sy#26]

I used AN6 lines; found that 45° fittings into the trans worked out well; 3/8"NPT, IIRC. Couldn't find any AN fittings that fit the radiator, but then I didn't look all that hard; wound up cutting the rad tubes to stubs & hose clamping the braided lines to them. Added a bead of solder to the stubs to make sort of a ferrule to hold the hose securly. My plan is to get a pair of steel AN fittings, 90°, braze them to the stock nuts & a short stub of tubing - crude but effective.

 

[4C FED]

Instead of using the hose clamp at the rad. fitting, Earl's or Russell makes a fitting that goes from a hard line to -an.
It's a compression fitting on the hard line side.

They have it in the 6 -an to 5/16" size and a variety of others also.

 

[Sy#26]

Problem I had w/ those compression adapters was the length - mine's pretty tight in there, didn't have the extra 9/16" those took up. I'll go to the fabbed up 90° ones soon.

 

[myclone]

Went out and unscrewed the brass fitting(s) outta a old 700r4.. They are pipe thread pitch but not tapered. I screwed a tapered NPT fitting into the trans to see how if it would work. As long as you put teflon tape/sealer on them they should be ok (IMO).