tsosby20

How exactly do I go about installing a transcooler on my 03 1500 with no stock transmission cooler? Do I run new lines from the tranny, and radiator back to the new cooler? Thanks

swathdiver

Do you mean that yours does not have an external transmission cooler and or an internal one?

darkirish63

iTrader: (5)

An 03 runs the cooling lines to the radiator for cooling if it doesn't have an external cooler. You can either run the new lines in series with the radiator or bypass it all together as most people do if you're installing a 40k cooler.

tsosby20

okay! How would I go with bypassing? Just run the lines straight from the tranny to the cooler. Then just cap off the radiator?

tsosby20

It does not have a external one

swathdiver

You can make a factory installation or bypass the original unit in the radiator and use a large front one, like the Tru-Cool. You can cut the lines down low and use two clamps per line and then run them around the core support to the front cooler is the easiest way.

darkirish63

iTrader: (5)

Correct. However, if you live in a cold climate area, I would keep the radiator trans portion in tandem to warm it up in the winter. If you live in a milder climate area, I would bypass the radiator and just use the external. Are you going to use a Tru-Cool?

tsosby20

i am going to use a Hayden 679. The biggest then offer. It is like 50$

darkirish63

iTrader: (5)

Honesly, the 679 is no more effective than using the radiator to cool the tranny if you're planning on leaving it stock. The Tru-Cool is more expensive but in the long run will save you a lot of *** pain if you plan any upgrades at all.

RedXray

If you need to cut the OEM lines use a flare tool to put a flare on the line. This will help keep the clamped rubber hose from blowing off under high pressure.

Like posted above ^^^ spend the extra dough on the 40K. I had a Hayden 1403 (slightly smaller than the 679) supplied by my transmission builder (required for warranty). On hot summer days I would see 200* plus. While higher temps won't immediately hurt the transmission over time it will slowly cook the seals, o-rings and fluid.

Hayden 1403




Tru-Cool 40K