Braided line trans cooler lines 4l60e
Braided line trans cooler lines 4l60e I'm trying to replace my tranny cooler lines from my 4l60e with braided 6an fittings. I need to know what thread is in the case of the trans that the hard lines connect to. Obviously I'll have to replace the OEM housing fitting, but I need to know what thread that is to replace it.
It looks like a hydraulic thread? Thanks.
It looks like a hydraulic thread? Thanks.
I dont believe that there is no thread, they kinda snap in and have a c-clip to hold them. What I would do it get a couple of those Earl hard line adapters, and leave about 3-4 inches of the hardlines attached to the tranny, and put those adaptors on right there
so on a TH400 it would be a 1/4 npt thread as well i the case?
i was about to ask this in a new thread...thinking of running braided line also to get rid of the stock lines...
not trying to hijack the thread on ya also!
thanks
i was about to ask this in a new thread...thinking of running braided line also to get rid of the stock lines...
not trying to hijack the thread on ya also!
thanks
I talked to a speed shop and told him that the threads should be the same as a TH400, but he said they were not and gave me a shitty look. 
He said he has nothing to offer me. I'm going to have to ask a hydraulic shop or something to see if it's a special thread. It looks like a 13M, but I'm not sure.
I would retain some of the hard line, but my mechanice cut them and threw them out because he was set on using stainless line. $$$
He said he has nothing to offer me. I'm going to have to ask a hydraulic shop or something to see if it's a special thread. It looks like a 13M, but I'm not sure.I would retain some of the hard line, but my mechanice cut them and threw them out because he was set on using stainless line. $$$
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Verdad Gallardo i was afraid to bent my stock lines to fit up with the TH400 location. they don't seem to be in the same area....looked like the lines had to bend alot to get there...... i wanted to use the stock plugs over into the th400 till i saw this.
how far away is it from working then?
how far away is it from working then?
Lines are forgiving. I bent mine all over the place.
Sometimes making the connection requires some Disney® Engineering.
http://bertok.us/pics/80swap/80lines.jpg
http://bertok.us/pics/80swap/60lines.jpg
Sometimes making the connection requires some Disney® Engineering.
http://bertok.us/pics/80swap/80lines.jpg
http://bertok.us/pics/80swap/60lines.jpg
Last edited by James B.; Feb 19, 2012 at 02:17 PM.
Originally Posted by James B.
The are 1/4 NPT, on this I bet MY LIFE. You can use these adapters on 4L60-E, TH400 and early model 4L80-E with both lines up front. Do NOT use them on late model 4L80-E transmissions with the return fitting in the rear because it penetrates into the case and into the center-support to provide lube and cooling oil to the geartrain.
Any update on this?
I want to run a braided lines to my th400, but just wondering what thread to get?. One guy swears on his life its a 1/4 NPT, then someone else says he tryed that and didn't work.
How easy is it to remove the oem housing fittings on the trans case?
I want to run a braided lines to my th400, but just wondering what thread to get?. One guy swears on his life its a 1/4 NPT, then someone else says he tryed that and didn't work.
How easy is it to remove the oem housing fittings on the trans case?
This is a picture of a the Quick Disconnect fitting used on inlet and outlet of the 4L6X-E and the outlet of the 4L80-E. It is pictured next to a 1/4" NPT brass nipple:
These threads are 1/4" straight.
I am working on a Demolition Derby car right now, 1979 Cadillac Sedan DeVille with a 425 and a TH400. I rebuilt the TH400 last weekend and will be reinstalling it tomorrow. One of the things on tomorrow's list of chores is to bypass the cooler circuit and run the "out" right back into the "in".
I will post my findings with the TH400 cooler line fittings.
-James
These threads are 1/4" straight.
I am working on a Demolition Derby car right now, 1979 Cadillac Sedan DeVille with a 425 and a TH400. I rebuilt the TH400 last weekend and will be reinstalling it tomorrow. One of the things on tomorrow's list of chores is to bypass the cooler circuit and run the "out" right back into the "in".
I will post my findings with the TH400 cooler line fittings.
-James
Last edited by James B.; Feb 19, 2012 at 02:18 PM.
On the newer transmissions they are threadlocked to the case. Put a closed-end wrench around them and get some leverage. The QD fittings are steel and will not break off.
On the older transmissions they come out much easier. They had something that more resembled thread sealant rather than thread lock.
I've never had a problem removing either.
1/4" NPT to -6 AN.... Yes!
On the older transmissions they come out much easier. They had something that more resembled thread sealant rather than thread lock.
I've never had a problem removing either.
1/4" NPT to -6 AN.... Yes!
This is a picture of a the Quick Disconnect fitting used on inlet and outlet of the 4L6X-E and the outlet of the 4L80-E. It is pictured next to a 1/4" NPT brass nipple:
These threads absolutely are 1/4" NPT. So, for the 4L60-E and 4L80-E I am positive it is 1/4" NPT. It serves me nothing to lie about this. Disbelieve as you wish.
-James
These threads absolutely are 1/4" NPT. So, for the 4L60-E and 4L80-E I am positive it is 1/4" NPT. It serves me nothing to lie about this. Disbelieve as you wish.
-James
The thread the transmission case is 1/4 as you pointed out, but it's not 1/4 NPT....it's 1/4 NPSM
The difference? 1/4 NPT has tapered threads and 1/4 NPSM has straight threads. This is apparent in your picture that you posted.
You can actually run a risk of cracking the tranny case driving a tapred NPT thread into it.
Just wanted to point that out and carry on
