fitting sizes for internal tranny cooler and 4R70W tranny?

[RnrdTheFox]

I have a radiator ordered from Duff and I asked them what the fitting sizes were on the efi radiator. The response I got was it's the "standard sizes". Also looking for the fitting sizes for the 4R70W. I want to covert to AN fittings and custom hoses.

Thanks.

 

[COBlu77]

3/8" on the 4R70W and probably 1/4 " on the radiator. I just did the tranny lines and bought 2 60" pieces of 3/8" steel line with male ends. I bent them to match the shape of the forward C4 line and they were perfect. I used 3/8" Female to 1/4" Male adapters (Lowes) for the radiator.

 

[76 bronco J]

,,,,,,,, the 5.0 style aluminum radiator purchased from duff's a few years ago does have 1/4"NPT threads ,,,,was made by AFCO then not sure if they are still the same

 

[Broncobowsher]

The 4R70W has 5/16 IFF (Inverted Female Flare) fittings. Standard 5/16 steel hard line from a parts store fits just fine.

I think you would need a part like Russel 640330 to convert to AN-6.
Aeroquip has some other fittings like FBM1382 that may adapt the hose directly to a inverted flare fitting.
Earls has 991946ERL in blue anodized Alluminium and 961946ERL in steel that adapt 5/16 inverted flare to AN-6 as well
Goodridge 185001 I think is the same adapter as well.

As for the radiator side, that can be almost anything. Mine is 1/8" pipe thread. Others mentioned 1/4" pipe thread. My Ron Davis comes with adapters for what ever AN fitting you want (at least when you order an EOC and use it for transmission)

 

[COBlu77]

My 97 Mountaineer 4R70W must be an oddball, because I just made the lines on Tuesday and they definately were 3/8 flare. The original lines from my C4 were 5/16 and were too small.

 

[RnrdTheFox]

3/8" on the 4R70W and probably 1/4 " on the radiator. I just did the tranny lines and bought 2 60" pieces of 3/8" steel line with male ends. I bent them to match the shape of the forward C4 line and they were perfect. I used 3/8" Female to 1/4" Male adapters (Lowes) for the radiator.

Hmmmm. Did you have to cut the lines down and re-flare them? If not, I"m coming by this weekend if your around and bend mine to match

 

[Broncobowsher]

My 97 Mountaineer 4R70W must be an oddball, because I just made the lines on Tuesday and they definately were 3/8 flare. The original lines from my C4 were 5/16 and were too small.

Come to think of it, I may be thinking C4. I left the Bronco at work so I can't check right now. The more I think about it, I bet you are right.

 

[COBlu77]

Hmmmm. Did you have to cut the lines down and re-flare them? If not, I"m coming by this weekend if your around and bend mine to match

With 60" lines (already had the male 3/8" flare ends), I did not have to cut and re-flare them. By matching the bends from the forward C4 line, they were a perfect fit.