aftermarket transmission cooler

[dlivewyer]

When you install an aftermarket transmission cooler, do you have to put new cooler lines from the transmission or can you extend the stock lines.

 

[Caman96]

Yeah doesn’t Kit come with rubber hoses that extend? It’s probably just me, but those would make me nervous as hell.

 

[dlivewyer]

Yeah doesn’t Kit come with rubber hoses that extend? It’s probably just me, but those would make me nervous as hell.

Some do and some don't come with rubber hose.

 

[grampadirt]

Extend the stock ones,kit should have the hose,the clamps & those plastic thingies to attach it to the radiator.You could also make your own brackets to attach it to the core support.

I used one similar to this

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[Caman96]

Some do and some don't come with rubber hose.

I’m sure it’ll be fine and will make transmission happy.

 

[df2x4]

It's all going to depend on the specific application. If your truck came with the factory AUX cooler, you can buy a larger one that will fit the factory lines if you use thread adapters. Thread on that here:

https://www.gmt400.com/threads/how-to-factory-auxiliary-trans-cooler-upgrade.18104/

FYI, the TruCool M7B is the exact same part as the B&M coolers mentioned in there and is much less expensive.

 

[Wilecoyote]

My 98 S-10 LS V-6 trans **** the bed around 180k. I friend of mine rebuilt and he told me to bypass the stock cooler in the radiator and install a Hayden cooler in the front of the rad. while I put the trans back in the truck. I did and now 45K miles later it works fine.

 

[Erin]

I’m sure it’ll be fine and will make transmission happy.

Mine has been good with that setup for almost 5 years now. Keep in mind I only drive it about 5,000 miles a year.

 

[Schurkey]

he told me to bypass the stock cooler in the radiator and install a Hayden cooler in the front of the rad.

Bad advice, especially for anyone who does genuine winter driving.

The "trans cooler" in the radiator does two things: cools trans fluid that's hotter than the radiator coolant; which would be around 160--170 degrees. It also warms trans fluid that's colder than the engine coolant, speeding transmission warm-up in cold climates.

In short, the in-radiator "trans cooler" stabilizes the trans temperature so that it's held within normal operating limits. A stand-alone "cooler" cannot warm cold fluid, and--depending on the size of the cooler--could "over-cool" fluid.

There's basically four ways to plumb a "stand-alone" trans cooler. The way I recommend is to route the hot fluid into the stand-alone cooler first, then to the in-radiator cooler, then back to the transmission.

 

[L31MaxExpress]

Bad advice, especially for anyone who does genuine winter driving.

The "trans cooler" in the radiator does two things: cools trans fluid that's hotter than the radiator coolant; which would be around 160--170 degrees. It also warms trans fluid that's colder than the engine coolant, speeding transmission warm-up in cold climates.

In short, the in-radiator "trans cooler" stabilizes the trans temperature so that it's held within normal operating limits. A stand-alone "cooler" cannot warm cold fluid, and--depending on the size of the cooler--could "over-cool" fluid.

There's basically four ways to plumb a "stand-alone" trans cooler. The way I recommend is to route the hot fluid into the stand-alone cooler first, then to the in-radiator cooler, then back to the transmission.

In warmer climates like here in Texas, I do the GM method myself. From the trans into the upper radiator port, then from the lower radiator port to the inlet of the auxiliary cooler then back to the trans. This is how both my Express van and Tahoe were factory plumbed.