Does anyone know if the flared end of the line that presses into the fitting on the transmission the same type you can make with a flaring tool? I want to make my own lines and want to use the stock fittings since one has a check valve in it. Don't want to buy a flaring tool just to find out that it wont work.

Does it make a difference which way the trans fluid flows through the radiator?

No. You can buy fittings that will do this. Just remove the retaining clip and pull out the steel line, then simply put the clip back and press the new hose barb fitting in.

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[This message has been edited by Dennis LaGrua (edited 08-01-2014).]

You can also replace that quick disconnect fitting that has a check ball with a threaded fitting with a check ball
That is how I'm running AN line up to the trans cooler.
I'm pretty sure the older 4T65e 97-98 had that style.

You can 30 degree flare the older lines.

quote Originally posted by crashmydaytona: Does anyone know if the flared end of the line that presses into the fitting on the transmission the same type you can make with a flaring tool? I want to make my own lines and want to use the stock fittings since one has a check valve in it. Don't want to buy a flaring tool just to find out that it wont work. Does it make a difference which way the trans fluid flows through the radiator?

The early 4T65-E trans cooler line fittings accepted double-flared (sometimes called an inverted flare) 3/8 steel line that attached the fitting on the trans via a tube nut that is on the flared steel cooler line. Later 4T65-E's used a push-connect type cooler line connection which is completely different.

The double-flare is a 45 deg flare. AN flares are 37 deg single flares.

Most auto parts stores should sell the standard flaring tools that can do a 45 deg double flare. Note that the stock Fiero trans cooler lines that run the length of the chassis are only 5/16" diameter. It is OK to use these with a 4T65-E HD transmission provided you can hook up to them with a secure connection.

That having been said, I would NOT use the stock Fiero radiator trans cooler with a 4T65-E HD trans. You would be better off disconnecting it from the cooling loop completely and instead install a large external transmission cooler.

Contact Dave at www.tripleedgeperformance.com for info about coolers, fittings, and such. He also sells these parts.

-ryan


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[This message has been edited by Darth Fiero (edited 08-01-2014).]