P0740 torque converter clutch circuit malfunction acura

Recheck DTCs. If "O" ring is okay, replace transaxle and torque converter. Thank you very much. Was this answer helpful? Warm engine to normal operating temperature cooling fan will engage. Apply parking brake. Raise and support vehicle so wheels can rotate. Line Pressure Test 1. With engine off, remove pressure tap plug from line pressure tap on transaxle. See Fig. Attach pressure gauge to line pressure tap.

Tighten hose fitting to 13 ft. With gearshift lever in "P" position, start and operate engine at RPM. Note line pressure. Place gearshift lever in "N" position, and note line pressure with engine at RPM. Line pressure should be within specification. Shut engine off. Remove pressure gauge set. Using NEW seal washer, install and tighten pressure tap plug to 13 ft. With engine off, remove pressure tap plug from appropriate clutch pressure tap on transaxle.

Attach pressure gauge to appropriate pressure tap. Start and operate engine at RPM. Note clutch pressure reading with gearshift lever in appropriate position. Ensure clutch pressure is within specification. Do you. How to Replace a Transmission Neutral Safety Switch The neutral safety switch is a safety feature that prevents the engine from starting when the transmission or transaxle is in gear.

When the switch fails, the engine may not crank or it may start in gear. How to Flush Your Automatic Transmission A transmission fluid flush can be performed without a transmission flush machine - and it's safer for high mileage vehicles. What is Limp Mode? Any code within this range point to a transmission related fault.. Auto Repair Safety When working on or around any vehicle injuries can and do occur. Transmission Torque Converter Clutch Solenoid.

Get A Transmission Quote. Faulty Transmission Torque Converter Clutch Solenoid: SYMPTOMS — Failed in the Open Position The symptoms are different a torque converter clutch solenoid that fails in the open position… The symptoms of a torque converter clutch solenoid that fails while in the open position are quite different from a solenoid that fails in the closed position, as described above.

Diagnosing any Transmission Problem with NO Check Engine Light A correct diagnoses of a transmission problem when there is no check engine light is best accomplished with a professional transmission scan. Diagnosing a Failed Transmission Solenoid with Check Engine Light A failed transmission solenoid will normally set a diagnostic trouble code DTC , which will cause the check engine light to illuminate.

Reflashing and Reprogramming. Automatic Transmission Repair Costs. What is a fair price to pay for various transmission repairs? Automatic Transmission Rebuild Costs. Does your transmission need rebuilt? Remanufactured Transmission Options and Costs. Considering a remanufactured transmission? Get a Free Transmission Estimate by Email. Want an estimate for a remanufactured transmission? What is a transmission torque converter clutch solenoid and how to replace one if it goes bad.

What is a transmission pressure control solenoid and how to replace one if it goes bad. How to Replace Transmission Solenoids. Guide to various automatic transmission solenoids, how they work, and DIY instructions. If you are facing a transmission replacement, you can reduce the cost considerably by removing and re-installing the transmission yourself. How to Replace a Transmission Speed Sensor. For most vehicles, the speed sensor is plugged into the transmission or transaxle.

Nothing is more frustrating than getting into your car and the gear shifter lever being locked in Park. Installing an auxiliary transmission oil cooler can protect your transmission from overheating and failure. Learn how to check the condition of transmission fluid, what the different conditions mean and what, if anything, you need to do to keep your transmission running smooth. The neutral safety switch is a safety feature that prevents the engine from starting when the transmission or transaxle is in gear.

How to Flush Your Automatic Transmission. A transmission fluid flush can be performed without a transmission flush machine - and it's safer for high mileage vehicles. When a transmission fault is detected by the OBD-II system, the transmission may go into fail-safe or "limp" mode as it is also called in order to protect the transmission from internal damage.

It could be a valve body issue, a problem with the pressure going through the transmission, or a clogged filter. Articles on this site are always written with the DIY enthusiast in mind. We would never want to discourage that. With that being said, P is a tougher code to diagnose and is often out of the range of the shade tree mechanic.

This decreases fuel mileage. Stutters and Stalls- This would be a symptom of the transmission locking when it should not be. It feels exactly like when you need to downshift in a manual transmission. This increases fuel mileage and makes the transmission operate at a higher temperature.

Wiring Issues The wiring harness that goes to and from the transmission is one of the more vulnerable pieces of wiring on a vehicle. Torque Converter The torque converter itself or torque converter clutch can go bad and throw the P code.