VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. You can diagnose problems with your torque converters on many older transmissions by conducting a stall-speed test. You will need an assistant to continue filling the transmission during this process. If you had a transbrake, you would see around 3500 rpms. Building converters isn't for the faint of heart or the casual enthusiast, as torque converter welding machines run over $25,000 each. of torque at 3000 rpm. : a converter with a multiplication ratio of 2.5:1 that stalls 3000 rpm will produce 500 ft.-lbs. Step 1 – Take necessary precautions. Remember, the ratio is still a factor of the engine torque in the relevant range of the torque converter stall speed, i.e. You want to use a torque converter that is designed to keep your engine in its powerband, and not fall below the engine’s peak torque RPM. The equivalent location in a manual … It’s always advisable to contact your transmission or car manufacturer and ensure if whether it is safe to conduct the test.It is important because … The manufacturers rating of the stall speed is based on a certain amount of torque at a certain rpm. If it drops into second or first, the jump in RPMs is meaningless. If you had a transbrake, you could find full stall by putting your foot to the floor and reading your tach. The torque converter and Engine Control Module/ECM (SAE term: Powertrain Control Module/PCM) logic have been modified to reduce the possibility of this condition from occurring. Drive the vehicle for approximately 5 miles. The BB will make it stall more than it would behind a smaller engine. By definition, a torque converter functions by transferring power from the engine to the transmission and the rest of the car. A mechanical torque converter transmits power with only incidental losses; thus, the power, which is the product of torque T and rotational speed N, at input I is substantially equal to the power at output O of a mechanical torque converter, … Skip Shelton has been writing since 2001, having authored and co-authored numerous articles for "Disclose Journal." R & R Torque Converter Clutch and Reprogram ECM (PCM) 5.6 32000-06040 32000-06050 32000-33141 32000-73011 9B 50 Parts Information PART NUMBER PART NAME QTY PREVIOUS NEW 32000-06040 32000-06050 32000-33141 32000-73011 04004-48106 Converter Assy Kit, Torque 1 00289-ATFWS ATF WS 5.6 U.S. qts (5.3 liters) A torque converter acts in an automatic transmission the way a clutch would in a manual transmission. See all 1 photos. However, doing this will cause your engine’s power to push your vehicle before it reaches its true stall. Jeff Smith writer. Step by Step Directions to Drain a Torque Converter.. A misbehaving T-Converter can cause transmission slippage, stalling, strange noises and much more serious damage to the vehicle’s transmission. Mechanical dis-assembly of the torque converter is required when particles are too large to be suspended and removed through fluid exchange. Torque Converter Flash Point. If this happens, the fluids inside might spill or get dirty. In essence, a torque converter will never be able to footbrake stall up to where it is actually flash stalling. Grasp the torque converter firmly with both hands and pull it toward you with only a slight amount of pressure. of torque at the instance of full throttle acceleration if its coupled to an engine producing 200 ft.-lbs. Hi, i`ve heard of this but not sure how to do it. Hi, i`ve heard of this but not sure how to do it. How to Test a Torque Converter of torque at 3000 rpm. You'll get some good times that way. If you had a transbrake, you could find full stall by putting your foot to the floor and reading your tach. If you must "load " it against the brakes, to get a clean launch, it will not attain the full rpm of a flash, resulting in a somewhat slower et. The torque converter is best described as a fluid coupling between the engine and transmission that performs the same function as a clutch in a manual transmission car; that is, it smoothly applies the engine’s power to the rest of the drive-line. Most modern torque converters have four main parts: Impeller: The impeller is the torque converter input device. Small particles and debris from deterioration in the automatic transmission can prevent the torque converter from being fully efficient and may cause damage. If you can't get the mash-n-go method to work due to carb tuning, loss of traction, or whatever...another method that might help you roughly figure out your stall speed would be to cruise down the road at a low speed in drive and mash the gas and see how high the rpm's jump (without the trans downshifting!) Fluid will be expelled from the transmission cooling line at this time. Most of the factory torque converters are 12-13 inch diameter and have a stall speed around 16-1800 RPM. In essence flash stall and full stall are nearly identical. Due to the turbine already turning in the torque converter we end up with less torque multiplication. By definition, a torque converter functions by transferring power from the engine to the transmission and the rest of the car. Once the transmission has move through all the gears, including "Reverse," move the transmission back to the "Neutral" position. Converters for circle track cars provide stall speeds comparable to OEM units, but they are engineered to eliminate lost horsepower through slippage. Need help on flash speed on torque converter. 43 Posts . A more apt name for convertors might be torque mutipliers. The humble torque converter is little more than a fluid coupling, a hydromechanical connection where we enlist fluid to do our work via an impeller, stator, and … Copyright 2021 Leaf Group Ltd. / Leaf Group Media, Best Synthetic Oil: Changing Your Torque Converter to Synthetic, Gadget Online: Automatic Transmission Flushing. What is Torque Converter Stall? Posted by mclaughlin80 on Aug 08, 2009. Want Answer 0. Flash stall is the maximum your engine's torque can stall a torque converter. We hear a lot of questions about torque converters.. That’s why we’ve spent a fair amount of time covering torque converters in the past. In other words, how efficient is the torque you’re producing. Move the transmission through each of the gears when about three quarters of the total fluid capacity of the transmission has been drained and replaced. We know the term, it bolts to the back of the engine, and it uses hydraulic pressure to connect the engine to the automatic transmission. And what you will notice about the stall of a torque converter is its always listed in range. A faulty clutch solenoid could be another cause of a broken torque converter. Follow the Repair Procedure below to address this condition.More repair Toyota case,please check it here: Toyota Trouble Repair . Place a funnel at the mouth of the transmission dipstick tube. You see, here we have a torque converter. Torque Converter Basics. Pull the dipstick from the automatic transmission fluid check tube. Jeff Smith writer. I think my torque converter is wrong for my car. The information will be available in the vehicle's owner's manual. Foot. When enough torque is developed by the engine and the converter, the turbine begins to rotate and turns the transmission input shaft. Answer: Of the two measurements of torque converter stall, 'Flash Stall' is the most accurate. Add fluid as necessary. Secure the line to the catch pan, or have an assistant help. The torque converter is a hydraulic coupling which takes the engine’s mechanical force and converts it into hydraulic pressure. The flash stall rating is the only true rating of that torque converter; the only true stall rating you’re going to find on the torque converter. It does good out on the road but will flash to 3000, they claim 2400-2600 stall. Flash Stall is the actual stall of the torque converter. Position a bucket or catch pan under the transmission cooling line. Using high pressure fluid to couple the engine and transmission, the torque converter requires clean fluid to operate correctly. Torque Converters Stall Speed: Flash vs. The "flash" point, simply put, is the rpm at which a car moves from a dead stop under full load. Flushing the debris requires an exchange of transmission fluid. This is called converter ballooning. Mar 1, 2004. A Torque Converter is a literal name. Stall speed is a term often used when describing torque converters. A torque converter is merely a reaction to one of two things; a force applied (being the engine) or a resistance (being the car). Follow the Repair Procedure below to address this condition.More repair Toyota case,please check it here: Toyota Trouble Repair Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more! Shelton also operates a small automotive maintenance and part-replacement shop. The car is a 135" hard tail altered with a 511" hemi on 20% nitro. More torque results in more stall RPM. The greater rpm initially attained, the greater the amount of torque moving a ton and a half from a standstill. While rolling at a slow speed the throttle is depressed fully to see where the RPM will flash (or peak). Engage the parking brake. Discussion Starter • #1 • Nov 17, 2016 (Edited) Hey everyone, I had my car put on a chassis dyno today and the guy was telling me that the torque converter was flashing at or above 3500 rpm. This is commonly referred to as flash stall. The total transmission capacity will include the fluid contained in the torque converter. The size and internal configuration in combination with the torque and weight of the race car determine the true flash stall RPM. The flash stall rating is the only true and most accurate stall rating that you will find on a torque converter. This is called converter ballooning. However, the best way to test the true stall speed of your converter is to do a flash stall test. Flash stall is the actual stall of the torque converter that the torque converter is rated at and you are going to see advertised either on our website or in the catalog. Anyway so far it drive a little weird but I’ve read it is supposed to. Torque Converters Stall Speed: Flash vs. Disconnect the transmission cooling line. Discussion in 'PSI Superchargers Tech Questions' started by JT Heslink, Apr 25, 2008. 85 Posts . So while engine torque, engine horsepower, and the type of camshaft being used are very important on the input side, factors such as the transmission shift ratio, differential gear ratio and tire size are also just as important. It does this to keep the engine’s power output within the optimum range. Flash stall is always listed in range which is determined by different attributes such vehicle weight, gear ratio and tire size. This occurs when the converter no longer multiplies torque (this is known as the coupling speed). Mar 1, 2004. Im flashing a code that says torque converter solenoid now i have a leaking tranny cooling line could that be part of the problem? Foot-Brake stall is dependant upon too many variables. And wondering what flash stall I have. The torque converter clutch solenoid is a common part that fails within the automatic transmission. More torque results in more stall RPM. Therefore, classification of any torque converter based solely on a stall number isn't very accurate. Since a Torque Converter, (T-Converter) is your transmission’s number one assistant, a well cared for T-Converter makes for a happy transmission.A misbehaving T-Converter can cause transmission slippage, stalling, strange noises and much more serious damage to the vehicle’s transmission. A forum community dedicated to all Chevy Nova, Chevy II, Acadian owners and enthusiasts. And it's filled with fluid, and the fluid is … A torque converter operates as a device that multiplies the torque whenever the engine is at low rpm. The transmission cooling line will connect either to the radiator -- in dual core radiators -- or to a separate smaller radiator. Flash stall is generally read while the car is in motion. A torque converter with a higher stall will make extra stress where it couples with the engine, so make sure and use SFI approved flexplates and quality torque converter bolts. This method will not be true if tires spin or car is rolling too fast. For the best result, we highly recommend using a transbrake. This can cause various symptoms, such as slipping, overheating, and rough acceleration. 85 Posts . On straight alcohol the converter worked OK. Small particles and debris from deterioration in the automatic transmission can prevent the torque converter from being fully efficient and may cause damage. The easy answer is: The RPM a torque converter will allow the engine to attain with a given engine torque input. The torque converter harnesses the engine's power so it would make sense that the more power you make, the tighter the converter needs to … Open the hood. The three major components of a torque converter are the pump, the turbine, and the stator. There are four main parts to a converter – the turbine, the pump, the stator, and the front cover. The humble torque converter is little more than a fluid coupling, a hydromechanical connection where we enlist fluid to do our work via an impeller, stator, and … A torque converter’s job is to take the horsepower an engine produces and multiply that to make the car accelerate. Discussion Starter • #1 • Jul 12, 2007. For argument sake, let's say we're testing a 3500 stall Yank ST 3500. At the hit it is flashing to 7200 rpm and the car wants to haze the tires around 60' all the way to the stripe. Buy or acquire enough fluid to replace the total capacity, plus an additional two quarts. Now, he said the converter was loose, which … Below we have outlined how you can safely and easily conduct a torque converter test. Most of us enjoy the smooth and effortless feeling of driving in an automatic transmission car. Practice a few times at the track. The torque converter's diameter, fin angles, internal parts clearances, and stator design are some factors that determine stall speed. Is this how you tell how hi it stalls, i have a used one in my car that seems to work good, i was told it was a 3000 stall, it is a 10 inch. It attaches to the engine flywheel. Your power curve and torque output are two of the main things to consider. The flash stall rating is the only true and most accurate stall rating that you will find on a torque converter. Park the vehicle on a level surface. Clicking this will make more experts see the question and we will remind you when it gets answered. 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. A car with a 454 cubic inch engine will cause an identical converter to "flash" to a higher RPM than the same car with a 350 cubic inch engine, due to the additional torque of the big block . A smaller converter increases the … Direct the fluid flow into the bucket or catch pan. A torque converter reacts to engine torque—the more torque you feed a converter the better it will perform. type of braking system, disc or drum brakes, how well adjusted the brake system is, ring and pinion ratios effect foot-brake stall more dramatically, idle characteristics of engine, cam installation for low end torque as needed by … Since a Torque Converter, (T-Converter) is your transmission’s number one assistant, a well cared for T-Converter makes for a happy transmission. This involves rolling down the road at about 15 to 20kph and then standing on the throttle. This device sits between the vehicle’s transmission and the engine. Using high pressure fluid to couple the engine and transmission, the torque converter requires clean fluid to operate correctly. Recheck the fluid level. Stall is measured in three different ways. 1.With the vehicle at operating … Joined: Oct 16, 2005 Messages: 102 Likes Received: 1. Start the vehicle. Factory torque converters are notorious for growing when exposed to added pressure, often expanding to the point where the front cover pushes against the flex plate. For a converter to operate properly, the engine needs to make as much low and midrange torque as possible in the same rpm range the converter is rated for. Allow the transmission to cool for 30 minutes if the engine is hot. In essence flash stall and full stall are nearly identical. Aug 07 2020, 12:46am. Turn off the engine, once the full amount of transmission fluid has been exchanged, turn off the engine. Over time, debris from disintegrating internal moving … If it's a TH350 or similar, disconnect the kickdown from the throttle while you do this to keep it from down-shifting. You should … Pour in transmission fluid at about the same rate fluid is being drained into the catch pan. Things to Consider When Buying a Torque Converter. : a converter with a multiplication ratio of 2.5:1 that stalls 3000 rpm will produce 500 ft.-lbs. Using high pressure fluid to couple the engine and transmission, the torque converter requires clean fluid to operate correctly. The size and internal configuration in combination with the torque and weight of the race car determine the true flash stall RPM. It’s a cammed 4.8 with a 4l60e in it this is my first stalled truck I’ve owned so I don’t know how to test it to see what it has. The torque converter plays a significant role in transmitting the torque of the engine during the process of multiplication (converter) and coupling (lock-up). A torque converter is designed to transfer the torque produced by the engine, and convert that into usable power to be applied to the ground through the transmission, rear-end gears, and ultimately the tires. Step 3 Turn the torque converter counter-clockwise until you hear a sharp click and it moves toward you about an eighth of an inch. This promotes excellent fuel economy and drive ability because they are specifically designed for … He holds a Bachelor in Science in education and a Master of Business Administration with an emphasis in management from Northwest Nazarene University. See all 1 photos. (i.e. Flushing the debris requires an exchange of transmission fluid. The torque converter is located between the engine and transmission. Restart the engine. It is a device that uses fluid to multiply torque up to a certain point, until the components inside become nearly mechanically coupled due to fact the fluid can't slip between the internal fins anymore.