Pressure in Transmission Lines

[stever1000]

Does anyone know what kind of pressure (operating and maximum) that the transmission lines see to and from the radiator transmission cooler? I searched and couldn't find any reference.

The reason I ask is I want to substitute "fuel hose" in place of transmission hose for my B&M cooler install. Before you say don't use fuel hose, please consider this:

The fuel hose is $1.60/ft and rated to 50 psi whereas transmission hose is $4.50/ft and rated to 250 psi. The cost adds up quickly if I am going to purchase ~8' or more of hose...

I looked at the supplier specs, and the rubber is the same, it's the reinforcement that is different. Apparently, they use the same rubber, the difference is the reinforcing yarn and thus the pressure rating.

Could I get away with 50psi hose for the trans cooler? Or Should I spend 3-4x as much for the higher rating?

 

[I_bRAD]

Does anyone know what kind of pressure (operating and maximum) that the transmission lines see to and from the radiator transmission cooler? I searched and couldn't find any reference.

The reason I ask is I want to substitute "fuel hose" in place of transmission hose for my B&M cooler install. Before you say don't use fuel hose, please consider this:

The fuel hose is $1.60/ft and rated to 50 psi whereas transmission hose is $4.50/ft and rated to 250 psi. The cost adds up quickly if I am going to purchase ~8' or more of hose...

I looked at the supplier specs, and the rubber is the same, it's the reinforcement that is different. Apparently, they use the same rubber, the difference is the reinforcing yarn and thus the pressure rating.

Could I get away with 50psi hose for the trans cooler? Or Should I spend 3-4x as much for the higher rating?

8' of rubber hose? You don't want to run a hard line?

 

[Black798]

You'll be fine using fuel line. That's what I used on mine and it has been problem free for over 2 years. The lines to and from the cooler don't really have any pressure in them

 

[stever1000]

8' of rubber hose? You don't want to run a hard line?

I'm just quoting what people said in the B&M install thread... approx 8' depending on how the lines are routed...

 

[LittleCaesar]

The heat of the ATF can lead to the end of the fuel line becoming mushy and may fail over time. Saw it happen on a Nissan Titan a couple of years ago but the guy had been using fuel line for years as a substitute so YMMV.

 

[tvpierce]

I can't speak to how fuel line will hold up to ATF, but there's essentially zero pressure on the transmission cooling lines. It's not restricted on the return side, and it pumps at a leisurely pace: a quart in 5-7 seconds if I were to guess.

 

[jgue467]

When it comes to hoses, I have a habit of using the one meant for the job. I used the official trans fluid hose, you only need about 2.5 feet not 8. Been trouble free over 120k miles. :cowboy:

 

[kball]

As said, should not be much of any pressure unless there's a blockage. But the trans does build some pressure.

 

[stever1000]

Thanks for the info - I have fuel line on there temporarily (already bought it, and the B&M hose wasn't long enough) and will swap out it out before too long.