12/24/2023 0 Comments Leaking transmission cooler lines![]() Disconnect the oil cooler lines (4) from the transmission.Ģ0. Carefully lower the transmission to gain access to the cooler line fittings.ġ9. Remove the front exhaust pipe assembly.ġ7. Support the transmission with a transmission jack.ġ6. Remove the clip (2) that holds the cooler lines together.ġ4. Remove the rear sections of the cooler lines from the retainer (1) located on the right side of the engine.ġ3. Remove the front sections of the cooler lines from the vehicle.ġ2. Remove the cooler lines from the retainer (1) located on the radiator shroud.ġ1. Separate the front and rear cooler lines at the quick connect fitting (2).ġ0. Remove the cooler lines (3, 4) from the radiator.ĩ. Pull the cooler line straight out from the quick connect fitting.Ħ. Remove the retaining ring from the quick connect fitting.ĥ. Using a bent-tip screwdriver, pull on one of the open ends of the retaining ring in order to rotate the retaining ring around the quick connect fitting until the retaining ring is out of position and can be completely removed.ģ. Pull the plastic cap back from the quick connect fitting and down along the cooler line about 5 cm (2 inch).Ģ. Perform the following procedure when removing the cooler lines from the quick connect fittings.ġ. Refer to the appropriate steps when servicing individual lines. Important: The front and rear sections of the cooler lines can be serviced separately. Transmission Fluid Cooler Hose/Pipe Replacement (Body Vin Code 3) Vehicle Transmission and Drivetrain Automatic Transmission/Transaxle Fluid Line/Hose Service and Repair Procedures If you look at pics 6 and 7, you will see the clips I'm referring to.Ģ002 Chevy Truck TrailBlazer 4WD L6-4.2L VIN S They are small, hard to see, and like to fly off. Note: When you remove the retainer which holds the line on at the trans and radiator, be really careful not to lose it. The attached pics correlate with the directions. ![]() Other than that, it is going to be tight and difficult to move around under the vehicle and to guide the lines where they belong. ![]() However, I'm not sure if you have access to one. The cost is usually about the same as for new lines, so this is more of a last resort if new lines are unavailable for some reason.The easiest way to do it is on a lift. In most cities, there are places equipped to make or rebuild hydraulic lines, which would be able to replace the leaking rubber lines and remake a factory-style crimp. ![]() One option to replacing lines is having the lines rebuilt. The two transmission cooler lines or hoses are almost always replaced together. But how hard the assemblies are to replace depends on their routing through the tightly organized engine bay, which is the primary challenge. At their endpoints, cooler line assemblies ordinarily have push-fit clips to attach at the transmission and the cooler, which are relatively simple to undo. Many newer vehicles, however, use non-replaceable clamps, which means replacing the entire line and hose assembly. If the flexible hoses have a replaceable clamp to the fixed lines, then replacement is usually just the flexible hoses. Most often the lines are metal, with flexible hoses connecting between the engine assembly to the cooler fixed on the frame. If there are two transmission coolers (the main cooler and an auxiliary cooler) there will also be lines connecting the two. Whatever system is used will have a pair of solid metal lines (a supply line and a return line) running from the transmission to the cooler at the front of the vehicle. ![]()
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