Which line is the return line on a 4l60e transmission?

Which line is the return line on a 4l60e?

The 4l60e top port is the return line, the bottom port is the pressure line. The bottom pressure port on the tranny should be hooked to the top port on your radiator. The bottom port on your radiator is the return and should be hooked to the top port on your tranny.

Which line is in and out on 4l60e transmission?

The 4l60e transmission cooler line flow is very easy to follow. As the gif above shows, the bottom line is the hot line which sends warm transmission fluid out to the factory trans cooler within the radiator at the lower port in most cases.

Which is transmission return line?

Generally the higher line on the radiator has fluid going INTO the transmission and the lower one goes back to the transmission, so the higher line has fluid coming out of it and the lower line sucks it back into the transmission.

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What happens when transmission lines are backwards?

If you had it reversed, the pump would be trying topush fluid through the bottom of the cooler, up through the cooler, out the top into the bottom of the rad, and up through the rad to the top. More weight to push.

What size are 4L60E transmission lines?

-6 x 1/4NPS is the correct size for GM turbo 350, Turbo 400, 700R4, 4L60E and many other GM transmissions. These have a straight thread and seal on the gasket. Unlike a tappered pipe thread these will not crack the case.

Where are transmission cooler lines?

Remove the two transmission cooler lines from the bottom of the radiator. These two lines can be accessed either from underneath the hood or underneath the vehicle. Use the flare nut wrench to remove the lines in the same manner used to remove the lines from the transmission.

Which line is the return line on a 4l80e transmission?

Early model return line is in the lower front.

Should transmission cooler be before or after radiator?

Expert Reply: The biggest reason that transmission cooler manufacturers and vehicle manufacturers want transmission coolers installed after the factory cooler rather than before it is because the transmission cooler in the radiator is surrounded by the coolant in the radiator.

What runs through transmission cooler lines?

Fluid heated by the transmission, engine, or power steering pump flows to the cooler. The air moving over the fins of the cooler cools the fluid, which is then routed back to the transmission, engine or power steering pump in a continuous loop through the return line.

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Can you hook up transmission lines backwards?

Re: tranny cooler lines backwards

If the lines go in either the top or the bottom, they can be hooked up any way. If one goes in the top and one in the bottom, make sure the cooler fills from the bottom.

Can you use rubber hose for transmission line?

You can use rubber hose, but make sure it’s transmission cooler line rated. The pressure is quite low (12-15 psi). Double clamp it or use FI type clamps instead of the worm-drive style.

Which transmission line is the return on a radiator?

The top line at the radiator is the return line, the bottom line at the radiator is the hot line.

What happens if you bypass a transmission cooler?

If the transmission cooler is part of the radiator, it means it uses the coolant temperature to regulate the temperature of the transmission fluid. If you were to put a separate bypass “air” cooler, you may be inhibiting the quick warm up provided by the coolant on cold starts.

Which line is the return line on a Turbo 350 transmission?

On a GM Turbo 350 transmission the bottom line is the return line and the one to install a transmission cooler on. The top one is the send line.