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Inspect Torque Converter

Inspect Torque Converter . Cutaway View. Turbine Impeller. Clutch Plate. Damper. The internal parts of a TC, torque converter include the: Impeller Turbine Clutch Plate with damper Stator and one-way clutch. Stator. One-way Clutch. Exploded View.

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Inspect Torque Converter

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  1. Inspect Torque Converter Tom Birch, 8/07

  2. Cutaway View Turbine Impeller Clutch Plate Damper The internal parts of a TC, torque converter include the: Impeller Turbine Clutch Plate with damper Stator and one-way clutch Stator One-way Clutch Tom Birch, 8/07

  3. Exploded View Clutch Plate Turbine Stator Impeller Cover Thrust Spacer Spring Thrust Bearing This view shows the converter as a rebuilder sees it. The cover is welded to the impeller to contain the other parts. The stator and one-way clutch float on the stator support; the clutch plate floats on the turbine which floats on the turbine shaft; and the thrust washers keep the internal parts separated. Tom Birch, 8/07

  4. TC Rebuilds One school of thought is that the converter should be rebuilt at every transmission rebuild, especially if the transmission is high mileage or very dirty inside. Transmission crud can pack inside of the converter and be nearly impossible to clean out; this crud can return to the rebuilt transmission to cause future problems. Tom Birch, 8/07

  5. TC R 2 A faulty TC must be rebuilt if it is to be reused. These faults include: External damage Faulty one-way clutch Fluid leaks Excess end play/clearance Internal interference Damaged turbine splines Worn clutch lining Tom Birch, 8/07

  6. Visual Inspection This hub can possibly be cleaned using fine sandpaper, but if there is any metal scoring, it should be replaced. Other external damage to look for includes damaged drive lugs/studs and starter ring gear. Tom Birch, 8/07

  7. Turbine splines Internal splines for input shaft External splines for clutch plate Turbine Hub Visually check the hub for stripped or damaged internal splines. The hub is riveted to the turbine, and the internal splines are visible through the converter hub. Tom Birch, 8/07

  8. Stator Clutch Stator Pump Outer Race Accordion Springs Rollers Inner Race Stator Support The stator can rotate in a clockwise direction but not the other way. The inner race (yellow) connects to the pump stator support so it will not rotate. Tom Birch, 8/07

  9. Stator Clutch Failure A failed stator clutch will either #1 not lock or #2 lockup completely. #1 will allow the stator to free-wheel so the converter will not multiply torque. The result will be poor vehicle acceleration and pulling power. #2 will cause the stator to remain stationary all the time. The result will be poor cruise ability and reduces fuel mileage. Tom Birch, 8/07

  10. Stator Clutch Check The finger is touching the splines of the inner race. It should rotate easily in one direction and be difficult in the other if the one-way clutch is good. Tom Birch, 8/07

  11. SCC 2 The snap ring pliers are gripping the inner race, and you should be able to rotate it in both directions. The race should rotate easier in a counterclockwise direction if the one-way clutch is good. Tom Birch, 8/07

  12. Pressure Check Plug Air Valve Stem This special tool has a plug that enters the converter hub and expands to seal the opening. The converter can be pressurized to test for leaks. The blue band keeps the plug from being blown out of the converter. Tom Birch, 8/07

  13. PC 2 Air Valve Stem Pressure Release Plug A similar air pressure test tool. Tom Birch, 8/07

  14. Pressure Check Procedure After installing the plug and retaining device, the air pressure in the converter is adjusted to 30—40 psi. Soapy water is then sprayed on all suspected areas, especially any welds. Air bubbles indicate leaks. Be sure to release all of the air pressure before removing the test fixture. Tom Birch, 8/07

  15. End Play The snap ring pliers are gripping the one-way clutch inner race. You should be able to feel a slight movement as you lift the pliers. Excess motion indicates worn thrust bearings/bushings. Tom Birch, 8/07

  16. End Play The adapter is expanded to grip the turbine or one-way clutch splines, and the dial indicator is set up to measure the vertical movement/ end play. Tom Birch, 8/07

  17. Internal Interference Input Clutch The converter was placed on a bench top; the pump splines were inserted into the on-way clutch; and the input shaft was inserted into the turbine. Now the pump and then the input shaft are rotated while you listen and feel for contact between the various parts. Pump Torque Converter Tom Birch, 8/07

  18. IF 2 Gravity moves the turbine and stator toward the front of the converter, and internal wear or damage will cause parts to run into each other. Tom Birch, 8/07

  19. IF 3 Next, turn the whole assembly upside-down, and repeat the check. Any contact, heard or felt, indicates a converter that should be replaced with a new or rebuilt unit. Tom Birch, 8/07

  20. Rebuild The weld between the front cover and the impeller is cut on a special lathe so the converter can be opened and the internal parts removed. Tom Birch, 8/07

  21. R 2 Converter parts being removed from a washer. Now they can be inspected to make sure that they are reusable. Tom Birch, 8/07

  22. R 3 A converter is setup to weld it back together. This machine was used to cut the weld so it could be taken apart, cleaned, inspected internally, possible had a new clutch installed, and had the end play adjusted. Tom Birch, 8/07

  23. Handle With Care The plastic thrust washer on this stator is broken. It came from a converter that was rebuilt, but someone dropped the converter. This problem was found after the converter was replaced. Tom Birch, 8/07

  24. Don’t forget the Flexplate Crack Transmission side Engine side This vehicle had a converter noise problem. Note the crack surrounding most of the mounting bolt holes and the rub marks. Tom Birch, 8/07

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