Top 10 Best 7.3 Torque Converter In [2022] - toppicksguide.com (2023)

FAQs

What is the strongest torque converter? ›

The Koenigsegg Regera Has the Strongest Torque Converter Ever Made. That's what happens when you have 1475 lb-ft of torque and no transmission. Koenigsegg's Regera hypercar is special in a lot of ways. But perhaps the most interesting part of the car is the fact that it doesn't have a transmission.

In general, the desired stall speed should be 500-700 RPM below the engine RPM at peak torque. This ensures a margin for application for the torque converter to take off. You don't want to have to floor your gas pedal and wait a few seconds for your vehicle to move. Think of it as a balancing act.

Before selecting a torque converter, it is important to know your motor specs. The cam is going to dictate the power band of your motor. If your motor generates more power in the lower RPM range, you'll want to select a converter that stalls at the beginning of that RPM range.

Yes, changing transmission fluid or performing a transmission flush will help fix most torque converter shudder problems. However, If you let your torque converter shudder for too long you might have to rebuild or replace it.

Converter stall speed must be high enough to put the engine into the torque range where it can most efficiently launch the car. If converter stall speed is too low, the car will be lazy leaving the line; if too high, there'll be excessive high-gear slippage—either case adds time to your e.t.

Comet 40/44 Series Torque Converter System (Symmetrical)

Comet 40/44 series is a mid range torque converter system for 8 to 18 hp applications.

For our street driver, Street Hemi Coronet, we considered some of the great converter manufacturers like Turbo Action, ATI, Dynamic, Transmission Specialties, and TCI. We've used each one of these reputable companies' torque converters through the years without a single issue.

A higher stall torque converter will let your car accelerate better because the car will be taking off at the rpm range where it is making the most power. But you don't want a stall speed that is too high either.

Larger-diameter converters are usually more efficient and deliver less slippage, while smaller-diameter converters offer more stall speed and more slippage.

Switching to a higher stall-speed torque converter can provide the benefit of increased launch RPM and better low-speed acceleration. Once your vehicle is up and moving, though, a different converter will have little effect.

Is a 2500 stall converter Streetable? ›

One of the biggest bangs for the buck you can buy is a stall converter. Most of the "daily driven" street cars we build have anything from 2,400 on up to a 3,500 stall converters in them and they are very streetable with no problems.

Dirty or contaminated transmission fluid needs to be flushed and replaced with fresh fluid. A mechanic will drain the old fluid from the transmission, including the torque converter, and replace it with new fluid. They may also add a transmission fluid conditioner to help prevent future shudder issues.

When the torque converter starts malfunctioning, you may feel shuddering and even slipping in overdrive. You usually notice your car shuddering because it feels like it's vibrating. Your car will vibrate even when you're not going very fast. The shuddering makes the car lag and is very noticeable.

Stock torque converters generally have a stall speed around 1,800-2,000 rpm. Higher stall speeds become necessary when horsepower and torque happen at higher rpm ranges. You want stall speed and maximum engine torque to happen around the same rpm range.

Too low a stall torque converter will not benefit the customer. If the user has an application that requires at least 3000 rpm stall and they purchase a 2000 to 2500 rpm stall range converter, it will normally not even give them the 2000 rpm stall.

Most stock converters have a stall speed of 1500-2500 RPM, but aftermarket converters can double and occasionally triple that amount.

For mild performance cars with something like a 350 HP engine, a 2,200 - 2,400 stall is about right. The basic rule of thumb is; if your engine "comes alive" at say, 3,500 RPM, then you want a stall converter with about 3,500 of stall to it.

Make sure converter can rotate and has end-play. Converter must be free to move a minimum of 1/8", but not more than 3/16". If converter has no end-play, converter was installed improperly.

A 2,500 stall speed doesn't mean you need to rev the motor to 2,500 rpm for the vehicle to move." What it does mean in this case is 2,500 rpm is the limit at which the converter will hold back the engine speed if transmission output is prohibited.

Why do you want a low stall torque converter? ›

With a responsive turbo (especially the newer VGT models), a low-stall converter will deliver more power to the rear wheels and create less heat without lockup.

When it comes to parts, the stall converter is considered the best bang for your buck. With the majority of street cars that are driven daily we build have stall converters ranging from 2,400 to 3,500, with no problem being street driven. Whereas, we will sometimes use 4,000 RPM stall converters on strip / street cars.

As a type of fluid coupling, a torque converter transfers rotating power from a prime mover to a rotating driven load. The latter helps to connect the power source to the load in an automatic transmission.

However, a stall converter will affect your daily driving by lowering your fuel economy substantially. This makes it a poor option if you're using the car for commuting. The reason that a stall converter boosts your acceleration is that it doesn't allow the tires to break loose until you reach a higher RPM.

Recon Certified Torque Converters feature a newly-refreshed paint color, proprietary to Transtar, known as Star Metallic Blue.

As a part of your engine, camshafts operate within a certain RPM range. Add 500 RPM to the starting number of this range—this is the ideal stall speed for your torque converter. For instance, if your camshaft operates between 1,600 and 5,200 RPM, a good torque converter stall speed would be 2,100 RPM.

A high stall converter can easily make enough heat to fry a transmission if you hold it on the line long enough at full RPM if the stall speed is above 3,500 RPM or so, so a good tranny cooler is essential when running ANY type of high stall converter.

Disadvantages of Torque Converter

Higher fuel consumption, especially when it does not have a blocking system. Expensive maintenance. More fluid change needed.

The metal rectifier has low losses and higher efficiency as compared to other AC to DC converters.

A bad torque converter can damage a transmission. Bad torque convertors can lead to damage, overheating, friction, and transmission fluid degradation. If these problems continue, it can cause even more damage to transmission.

What does a 3000 rpm stall converter do? ›

The car will roll at a lower RPM and may never reach 6000 RPM. This is true for a 3000 RPM converter. Most mild race cars will use between 3500 to 4500 stall speeds on average.

In addition to the very important job of allowing your car to come to a complete stop without stalling the engine, the torque converter actually gives your car more torque when you accelerate out of a stop. Modern torque converters can multiply the torque of the engine by two to three times.

Torque converter stall speed will vary between 3000-3200 RPM and is based on rear gear, weight and size of camshaft.

1,700-1,800 rpm stall speed.

Instant Shudder Fixx usually works instantly, as the name implies, but can take up to 20 miles of driving in severe cases. If the shudder problem goes away, your problem was most likely fluid related.

Instant Shudder Fixx™

A concentrated friction modifier formulated specifically for eliminating torque converter shudder problems instantly! It is packaged in a uniquely engineered two ounce application tube, LUBEGARD's Instant Shudder Fixx™ is compatible with conventional or synthetic automatic transmission fluids.

If the TORQUE CONVERTER shudder returns one more treatment may be added. Do not use the Instant Shudder Fixx again unless you change the fluid completely.

A CVT transmission is possibly the best to drive in the city. Because it has an infinite amount of gear ratios, the TCU of a CVT keeps the engine in its sweet spot making this transmission one of the most efficient. With that, as there are no physical gears to change, these are smooth.

SEA FOAM CAN HELP

An easy and effective way to diagnose or minimize transmission shifting problems is to use Sea Foam Trans Tune. Trans Tune helps fluid systems work smoothly and last longer, restores shift quality, cleans solenoids, and dissolves varnish residue and deposits.

What is the best additive for torque converter shudder? ›

Lubegard 19610 Instant Shudder Fixx Friction Modifier is the number one transmission instant shudder eliminator used by more professional transmission technicians. This is a five time concentrated friction modifier formulated specifically for eliminating transmission shudder problems instantly.

LUBEGARD Instant Shudder Fixx is a concentrated friction modifier formulated specifically for eliminating torque converter shudder problems in automatic transmission INSTANTLY. It is the #1 shudder eliminator used by professionals.

They are completely different transmissions. The Turbo 400 is larger, longer, and heavier than the Turbo 350 and was designed to live behind higher-torque applications such as big-blocks.

Switching to a higher stall-speed torque converter can provide the benefit of increased launch RPM and better low-speed acceleration. Once your vehicle is up and moving, though, a different converter will have little effect.

Stock torque converters generally have a stall speed around 1,800-2,000 rpm.

They are, for the most part, interchangeable on the same vehicles; however, you would normally find the TH400 in larger engine applications because they are able to function more reliably at higher engine rpms.

Thus, an upgraded or stronger TC will provide a better transfer of power to the drivetrain. You will not be gaining any horsepower, rather you will be recovering horsepower that would have been normally lost with your stock TC. In addition, a stronger TC will have a higher stall speed.

Many torque converter failures can be caused by excessive friction, which means the torque converter's needle bearings are damaged. Also, a faulty seals or faulty clutch solenoid can be to blame. A faulty seal can allow fluid to leak and become contaminated. A bad torque converter can damage a transmission.

You definitely want to drain both the transmission and the converter as much as you can. Pull the converter and let it drain for several minutes, or even an hour or two. The same goes for the transmission pan.

When a vehicle first accelerates from a stop, throttle pressure is higher than governor pressure, so it stays in first gear. As speed increases, the governor pressure (affected by vehicle speed) increases until it overcomes throttle pressure, moves the shift valve, and causes an upshift.

What happens if stall converter is too small? ›

Too low a stall torque converter will not benefit the customer. If the user has an application that requires at least 3000 rpm stall and they purchase a 2000 to 2500 rpm stall range converter, it will normally not even give them the 2000 rpm stall.