1500 rpm torque converter

In the Dodge Ram, a bad torque converter is often caused by bad transmission fluid, worn clutches, bad seals, or loose bolts. Symptoms of a bad torque converter include a vibration, too much RPM on the highway, and slipping. When a torque converter is malfunctioning it can cause this stall speed to change and feel like the transmission is slipping.

If you suspect this is happening with your car, has your fuel mileage changed? Nearly all modern automatic transmissions have a locking torque converter. A locking converter has clutches in it that lets the transmission make a physical connection with the engine. This eliminates operating inefficiency when it is at high speed usually after about 45 miles an hour. This increases the fuel mileage achieved and brings an automatic transmissions efficiency more in line with a standard transmission.

When this happens, your torque converter has a higher effective stall speed. Torque converters use a lock up clutch to create a true connection between the engine and the wheels. If the torque converter fails to unlock at lower speeds, it shudders. This shudder feels like a manual transmission when you need to downshift. A bad torque converter will often make strange sounds. Like your automatic transmission, the torque converter is full of transmission fluid. This fluid helps cool the converter and transfers energy.

It is important because the stall-speed test can ruin a number of newer transmissions, and even a few older ones;the manufacturer will be able to guide you in this regard. Keep in mind that vehicles with an anti-lock brake system or traction control do not support this test, and running it on vehicles with an electronically controlled transmission will set off the check engine light.

Ensure all fluids in the vehicle are in good condition before conducting the test. Ready the vehicle by chocking the wheels and setting the parking brake. Pressing the brake pedal all the way, turn the engine on and shift the transmission to drive. Remember to not release the brake pedal.

With one foot on the brake pedal, press the accelerator all the way for seconds with the other foot. Be careful not the exceed 5 seconds or the transmission could blow out. The stall speed is the RPM the engine maxes out at. An RPM reading lower than your engine and torque converters specifications means that the torque converter need a repair or replacement. An unusually high RPM reading indicates a slip in the transmission, which will have to be investigated.

Diagnosing torque converter issues could be a challenge, but there are several signs you can look for, and a set of simple tests you can conduct to determine whether the torque converter is causing the problem in your car. There could be a lot of things that could cause problems in the torque converter. Below are some of the most common:. Wear and tear in torque converters will cause the vanes to bend, resulting in slow shifting or failure to drive. A symptom of bent vanes is that the engine will rev higher than usual, with the sound turning normal as the system warms up.

Torque converter issues are a possible cause of such issues in the vehicle. Some of the most common forms issues with the torque converter may show up in are highlighted below:. A rather simple test can determine whether the torque converter is failing. When the fluid flow is powerful enough, it begins to spin the turbine, which is also splined onto the input shaft of the transmission. The characteristics of each converter are controlled by the diameter, the number and shape of fins, and stator design.

Stall speed is the amount of rpm the engine can reach with the brakes locked and transmission in gear before the drive wheels turn. The range listed will tell you what to expect from the converter.

Selecting the correct converter and stall speed for your particular vehicle is critical — not only on the street, but also on the race track. The right choice can make the difference between winning and losing; between a car that performs to its potential or falls flat on performance. Choosing the best torque converter for your application can be tricky, but there are some basic guidelines you can follow to help out in the process. Your power curve and torque output are two of the main things to consider.

If we look at a stall speed rated at 2, — 2,rpm, the range is meant to cover a variety of engine characteristics with different power curves. Ideally you want the stall to lock up somewhere close to the peak torque of the engine. Typically engines that produce more low-end torque will increase the stall speed.

The same converter will stall at a lower rpm behind a less torquey - higher rpm engine. Also, consider the resistance you will have against the engine. A heavy car with large diameter tires will create more to fight against. Generally speaking, the more resistance you have, the higher the stall rpm.