What size is transmission cooler line?

The sizes can run from 5/16 inch to 5/8 inch so that DIYer will need to be careful to choose the right size hose.

Can I use rubber hose for transmission cooler lines?

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.

What size are th400 transmission cooler lines?

Most 400s use 5/16″ flare fittings, and 5/16″ lines, most radiators do too.

What size are GM 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.

What size are 700R4 cooler lines?

Re: Trans cooler line sizes for 700R4

The threads in your radiator are for 5/16 line. A flex line any bigger is not going to flow any more oil.

What fluid runs through transmission cooler lines?

The most obvious sign of a transmission cooling line leak is the presence of transmission fluid. Look for red fluid when you move your car or if you’re under the hood, look around for that same red fluid on any hoses are gaskets.

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Which is the return line on a th400 transmission?

Top line at the trans, goes to top line at the radiator. This is the return line. Cooler fluid returns to the trans from the cooler through this line.

Does it matter which transmission line goes where?

Favorite Answer Yes it does matter. The cooler of the two lines is the return line and the one to install the transmission cooler on. Factory trans cooling lines to radiator, cooler, whatever it is.

Which transmission cooler line is the return?

How to Identify Transmission Fluid Return Line for Installing Supplemental Cooler The surest way to find the return line in a transmission cooler system is simply to run the cold engine for about 15-seconds while it is in gear. Then immediately feel the two transmission lines.

What are transmission cooler lines made of?

How Car Transmission Lines Work. Car transmission lines connect your vehicle’s transmission to the vehicle’s radiator. Also known as transmission cooling lines, they are typically made of metal or composite aluminium and rubber hoses because they can handle the flow of hot transmission fluid.

Which line is the return line on a 700R4?

Cooler Lines for the 700R4 and 200R4: On the 700R4 the bottom fitting on the right side of the transmission is the “out” line to the cooler and the top fitting is for the return line from the cooler. The cooler instructions say to go through radiator first then to external cooler back to transmission.

What is the best transmission cooler?

Our top pick for the best transmission cooler is the B&M SuperCooler Automatic Transmission Cooler, which comes with a complete installation kit. For price-conscious shoppers, the Hayden Automotive Rapid Cool Plate and Fin Transmission Cooler is a great option.

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