(At this point, an updated, expanded edition wouldnt go amiss, given all the subsequent development in CVTs and automatics with five or more speeds.). ), This cookie was set if you clicked the "Disable Google Analytics Tracking" link to prevent the Google Analytics service from tracking your use of the Ate Up With Motor website. By logging into your account, you agree to our. One is turned by the enginge. As the new owner of a 92 Alante with the viscous clutch I wondered what the difference was. Gears Magazine - Nag 1/722.6 P0741 TCC Slip Reach out to your local AAMCO transmission center when youre ready for your efficient, smooth and worry-free ride. There are many different types oftorque converter problems. But this shuttering is not caused by a disease. The original Packard Ultramatic had a four-element torque converter with a single stator (light blue) interposed between the first- and second-stage turbines, providing a stall ratio of 2.4:1 at 1,600 rpm. Heat is the enemy of any automatic transmission and will radically reduce its life span if not mediated by an efficient trans cooler. With Torque Pro torque slip shows it at 0-6 rpm at 60 mph and when coming to a stop it jumps to 25-40 rpm then raises to 1400+. . Think of it as two fans facing eachother inside an enclosure. You can hide the "Support Ate Up With Motor" box and prevent the loading of its embedded content by going to the "Consent Management" tab and switching the "Allow PayPal Button" toggle to "OFF." We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites. To learn more about what information the Vimeo platform collects and how that information may be used, see the Vimeo Privacy Policy. Petrol / Gas. would it work,yet throw out aod default codes. i called a trans shop and he had no answer,but it sounded strage to him. by SirHandyMan Fri Mar 29, 2019 6:54 pm, Post Your IP: I think you should check the fluid level first and foremost. So far the bogging down hasn't happened since last week. .. makes you appreciate the thought and consideration that goes into EFILive if only we could clone the boys (and girls) of EFILive, imagine a Delphi Ross and Bosch Ross, By WS600 in forum General (Petrol, Gas, Ethanol), By Bradazz in forum 4speed RWD/FWD Transmission Tuning (incl T42), By joecar in forum 4speed RWD/FWD Transmission Tuning (incl T42), 6 speed/8 speed RWD/FWD Transmission Tuning (incl T43, T76, T87), http://forum.efilive.com/showthread.012-T43-Tables, If this is your first visit, be sure to A tracking pixel, sometimes known as a web beacon, is a tiny image file that loads from a remote server; it's a type of embedded content (as is the button itself, which loads from the same domain). There are a number of posts referencing this issue, look for the wires coming out from under the intake manifold behind the elbow that contains the coolant thermostat. (author diagram). Larger-diameter converters are usually more efficient and deliver less slippage, while smaller-diameter converters offer more stall speed and more slippage. Stall speed is measured in the car by applying the brakes and revving the engine in First gear against the brakes. Cookies whose names begin with "_ceg" are associated with the Crazy Egg web analytics service (which is subject to the Crazy Egg Privacy Policy and Cookie Policy). If governor pressure dropped below that threshold, the clutch would disengage. there were around 6 defaults that popped up. A healthy plate clutch slips only briefly when engaged or disengaged. Remember, a torque converter is a coupler between the engine and transmission. The speed difference between impeller and turbine is simply lost to heat within the operating fluid. The result will be every car will have efficient, smooth, and comfortable rides. Starting in Drive provided a maximum starting ratio of 3.10:1 (a mechanical ratio of 1.44:1 times a nominal torque converter stall ratio of 2.16:1 at around 1,600 rpm), which was better than the early Ultramatic or Dynaflow, but still made for lazy performance, especially with Studebakers six-cylinder engine. Even though Dyno numbers are just a number, For reference my 2018 Gen3 made 400rwhp/390rwtq stock with 5k miles on a Dynojet,, It hit the speed limiter at 6700. So, you can see how those would be preferred from a standpoint of cost and packaging! The torque converter clutch is always slipping somewhere between 5% to 95% when engaged, which depends on vehicle speed and engine load.. We discussed the information to monitor on the scan tool, there is an actual slip, desired slip, and TCC status. Just thought I would share with everyone some recent learnings I've had with my 2010 EB Flex. Another important part of the torque converter and stall-speed equation is converter diameter. I had "guessed" that it could have been a valve body issue when trying to diagnose on my own and I replaced that to no avail. Torque converter slip question I was monitoring some Torque converter params for my 4R55E with my in dash scantool. Vehicle weight is another major factor that should be considered when selecting a converter. That drum is connected via overrunning clutch (fuchsia) to the rear sun gear (purple), which is also attached to the inner race of a second overrunning clutch (also fuchsia). But the most common torque converter problems are listed below. All site content Copyright 2007-var year=new Date(); year=year.getYear(); if (year<1900) year+=1900; document.write(year); FordFlex.net FordFlex.net is in no way affiliated with Ford Motor Company. The first automatic transmissions employed what was called a fluid coupling to connect the crankshaft with the transmission. In first and second gears, the converter turbine drove the front annulus (ring gear). Well Aaron . Ate Up With Motor and its embedded content providers may use cookies and/or similar technologies and collect personal information about site visitors as described in the Privacy Policy and Cookie Notice. (Those pages do not currently discuss the storage of data in your browser (or other user agent) using technologies other than cookies, e.g., in web storage.) We were wrong. if you dont hammer on it everyday it will last you a long time.. my stock converter had 350 rpms of slip on works great no real problems. The downside to these converters is that they are heavier and more expensive than non-lockup converters. Privacy Policy. In Drive, the direct clutch is engaged and both bands are released, causing the input sun gear, the low sun gear (orange), the planet carrier and output shaft (light green) to turn at input shaft speed. Once your torque converter starts failing, you need to be knowledgeable about what torque converter problems will disable your car? Most street torque converters tend to operate in the 3 to 5 percent slippage range, but this can go as high as 8 percent. What to Do to Fix Your Contaminated Transmission Fluid. Theglobal torque converter marketcontinues to grow and expand at a CAGR of 4.54%, which is projected until 2021. That isnt true of a fluid clutch, whose torus members are free to rotate at different speeds. There are several ways to arrange such a clutch, but the common object is to create a mechanical connection between the engine and the transmission input shaft (which otherwise is driven by the fluid clutchs turbine(s)). Do you want them slipping when driving? 7.3L Power Stroke - Aftermarket & Performance. One of the fundamental differences between a fluid clutch (a fluid coupling or torque converter) and a mechanical plate clutch is slippage. These cookies manage your cookie and privacy preferences. These cookies expire in about 15 days if the user clicks "Remember Me" when logging in; if not, the cookies normally expire when the user closes their browser (or other user agent), or, failing that, within about two days. RPM. Turbine Input Speed Sensor. - Ford Powerstroke Diesel Forum My SunCoast converter has a little slip. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Many times, people think there is something wrong with their transmission when the problem lies with their torque converter. There is more demand in today's market for increased comfort and safety in cars. A manufacturer's torque-converter rating is generally expressed as an rpm range. Locking the converter with a scan tool bypasses the tune and verifies everything mechanical is in order. Your car's automatic transmission has a torque converter. When starting, the fluid clutchs driving torus (the impeller) may reach a speed of 2,000 rpm or more before the driven torus (the turbine) begins to move at all, a point known as stall. Each PayPal payment or donation button may also incorporate a tracking pixel called "pixel.gif" (which loads from paypalobjects.com). AAMCO Centers are independently owned and operated. These a11y cookies normally expire after about seven days, but are removed immediately if you restore the applicable settings to their default values. The good news is, if it is just your torque converter that is having issues since it's a self-contained unit, you may not need to replace or rebuild your whole transmission. If the payment button is visible, it may set the third-party cookies PYPF (via paypalobjects.com, which is owned by PayPal, Inc.), which appears to check whether or not you are a logged-in PayPal user, possibly to facilitate the PayPal user login process, and/or 01A1 (via abmr.net, which is owned by Akamai Technologies), which stores certain technical information about your device and browser (or other user agent), possibly to facilitate the login and shopping cart functions. These torque converters allow some slippage but it should not vary much from the desired PCM value. The TCC solenoid regulates the fluid pressure to the clutch. If your car transmission keeps overheating, you may also notice your transmission starts to act funny, or it may even go into fail date and stay in one gear and not shift at all. It may not display this or other websites correctly. (Google, Google Analytics, and other related marks and logos are trademarks of Google LLC. The turbine has a spline that attaches to the transmission input shaft, which connects to the internal parts of the transmission to shift gears and provide power to the wheels. Except as otherwise indicated, all written content and images are copyright Aaron Severson dba Ate Up With Motor. Your Transmission Fluid is Contaminated. The stator is called the middleman because it serves as the conduit that reverses transmission fluid and sends it back to a turbine impeller. Cookie Policy -
They normally expire in just under one year, but you can delete the cookies in your browser (or other user agent) at any time. The torque converter is made up of five parts: The stator is called the middleman. Torque Converter Clutch Low Slip Speed Detection and Control Now that we have DISCONTINUED our use of Google Analytics tracking on this website, this cookie no longer functions no additional analytics data will be collected, with or without the cookie. The only problem - there's a boat-load of information and I only know how to interpret a fraction of it. That could be within the margin of error for the sensor. The stator is called the middleman because it serves as the conduit that reverses transmission fluid and sends it back to a turbine impeller. Ive been troubleshooting a low RPM with light acceleration shudder on my 2011 EcoBoost Flex. Actual shows 640 rpm in drive with the brake on. The stock converter wouldn't with a big tune unless I was cruising at light throttle. As these vehicles age, diagnosing these issues can become more challenging. Thu Aug 29, 2019 9:39 am, Post 5r110 torque slip | Ford Power Stroke Nation Shifting to third gear was accomplished by engaging the torque converter lockup clutch. Click to reveal Giving Slip the Slip: Lockup Torque Converters and Split Torque A 5 percent slippage factor means that if the impeller is spinning 3,000 rpm, the turbine is only spinning 2,850, or 5 percent slower. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. (These cookies may not be set at all for administrative users unless they access the publicly visible portions of the website and/or update their consent settings e.g., by accepting an updated version of the Privacy Policy. As long as this mechanical lockup remains fully engaged, there is no slip, which improves fuel economy (typically by around 4% at cruising speeds) and provides throttle response and engine braking comparable to a vehicle with a manual gearbox. So when the torque converter clutch engages there should be almost 0rpm difference between tc slip desired and tc slip act. For additional technical information about the cookies used by the analytics service, see their "Google Analytics Cookie Usage on Websites" page; for your reference when reviewing that page, we did not use Google Analytics 4. Thu Aug 29, 2019 1:33 am, Post What to Do to Fix Overheating and Seal Damage. Unless you have tune that keeps the converter unlocked, the converter should've locked. I think you probably have some time as long as you dont pound on it. AE parameters when looking for tranny slip? 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Think of a lock TC as the clutches in your tranny. The lockup clutch control valve, not pictured, allows pressurized oil to enter the clutch cylinder through a hollow passage within the input shaft, pushing the pressure plate (colored red, like the torus cover and impeller it rotates with) into the engaged position. In my limited experience, a failing converter in this transmission will start to throw off a lot of black carbon and cause the fluid to rapidly darken. Please register or login to enable Dark Mode. Torque converter clutch slip Scan tool values 99 GMC Pickup GM's 6L80 HP Tuning, DoD, and Torque Converters! (author diagram). Many of the other listed cookies are associated with the Google Analytics service, the Google AdSense advertising service, and/or other Google advertising and measurement products, which are subject to the Google Privacy Policy; see their "How Google uses information from sites or apps that use our services" page, the "Information for Visitors of Sites and Apps Using Google Analytics" section of the Google Analytics "Safeguarding your data" help page, the "Technologies" section of their Google Privacy & Terms site, and the "Our advertising and measurement cookies" section of the Google Business Data Responsibility site (which includes a detailed list of cookies associated with Google advertising and measurement products) for more information. You can't be sure the slipping or shuddering has anything to do with your torque converter until you check your fluid levels. If you are experiencing shuddering, also check your engine mounts. Borg-Warner continued to sell the DG series for several more years to some non-U.S. customers, but U.S. automakers would not rediscover the lockup clutch for another 20 years. Your IP: Your torque converter is full of fluid, and its jobis to act as a hydraulic pump and acts as a coupling between the engine and the transmission. I did the trans relearn today with the Spartan 275 tune. Have you ever gotten in your car, started it up, put it in gear only to feel it shudder? In second, the low band was released and the multi-disc clutch engaged, causing both ring gears to rotate at turbine speed. Post When you experience fluid leaks, you aren't retaining the amount of transmission fluid; the torque converter needs to transfer the power from the engine to the transmission. How ever this did happen right after I did the six 0 to 60 mph relearn runs. The slipping occurs while you're driving or changing gears, and it usually comes with some odd noises too. Come join the discussion about diesel performance, modifications, EGR deletes, troubleshooting, lift kits, tires, wheels, maintenance, and more! However, even at coupling stage, the turbine still turns somewhat slower than the impeller. Almost no one thinks of it, but when you drive your automatic transmission car, you're master over your cars torque converter. To avoid stalling or lugging the engine, the clutch would automatically disengage if road speed fell below 13 mph (21 km/h). (PayPal.com, PayPal, and all logos related to the PayPal services are either trademarks or registered trademarks of PayPal, Inc. or its licensors. In the early Studebaker Automatic Drive (Borg-Warner DG) transmission, the flywheel drives the torque converter impeller, front pump, and lockup clutch pressure plate (red). This is how the first fluid couplings were designed, but they were hideously inefficient because of high slippage. The fluid did not look dirty. The action you just performed triggered the security solution. It's all about creating an overall tuned package that complements the rest of your car. Reddit and its partners use cookies and similar technologies to provide you with a better experience. For more information, please see our When that connection is fully engaged, the fluid clutchs torus members are effectively locked together they must turn together at engine speed and transmit no torque. However, that did not cure the shuddering problem. A reverse band surrounds a brake drum connected to the front carrier, which is also integral with the rear annulus (orange). The impeller pump receives the transmission fluid once it's delivered. I wouldn't worry about it, but I'm not familiar with your specific transmission. Obviously some sort of mechanism would have been required to determine what gear to select and when to actually shift, but starting with a Wilson box at least some of the problems would have been solved. I havent studied the Wilson preselectors in any great detail, but if youre curious, the applicable U.S. patents are US1404675 and US1796904. (author diagram). For more information about how Akamai may collect, process, and/or use personal data, visit the Akamai "Privacy and Policies" page and Privacy Trust Center. I just checked it yesterday and it was right at the full indicator with the transmission properly warmed up. Basically, the fluid exits the center of the turbine and is redirected by the stator back into the impeller. One way to minimize coupling slip is to supplement the fluid clutch with a plate clutch that engages when the vehicle reaches cruising speed. The payment button in the "Support Ate Up With Motor" box (and similar payment or donation buttons that may appear on portions of the administrative dashboard, which is not normally accessible except to logged-in administrative users) contains embedded content served by PayPal services. If your going over ten your gonna need a new torque converter fairly soon..depends how you drive.. my converter started off slipping at about 13 on the 275 and ended up wearing out pretty quick and it began slipping like 45-50 on the gauge. (Both turbines, here colored medium blue, were bolted together into a single unit, but had different blade profiles.) Privacy Statement -
I don't think they had this in 2011 however. Advertising -
Like the contemporary Buick Dynaflow, Ultramatic was designed to operate most of the time in its direct drive top gear. In drive at 0 speed TCD should read 1020 rpm and TCA should be Engine RPM - Akamai is a registered trademark or service mark of Akamai Technologies, Inc. in the United States (Reg. Most street torque. and our Many aftermarket companies offer performance lockup torque converters that can provide a higher stall speed without sacrificing the advantages of the lockup converter for highway use. It's not more specific because stall speed is highly dependent upon engine torque. I have yet to read this monumental work in depth. I switched from a junk converter slipping that much to a tight well built version and picked up .3 and 4mph behind a healthy smallblock (10.2's at 127mph) The torque converter of the future will have a carefully tuned control strategy, which takes into account the torque demands of each vehicle. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. (WordPress and the WordPress logos are registered trademarks of the WordPress Foundation in the United States and other countries. These early units operated on the same principal of using one electric fan to drive another. The space ahead of the clutch formed a hydraulic cylinder containing an annular steel piston that acted as a pressure plate. Opening the throttle further could delay engagement to a maximum of 56 mph (90 km/h). This created the demand for a lockup converter employing an internal clutch inside the converter to directly connect the turbine with the input shaft of the transmission just like a manual-transmission clutch. That includes the advanced manufacturing technology being used in optimizing torque converters. JavaScript is disabled. I feel better and it makes more sense now. That's because torque converters transfer the power your car engine makes to the transmission in your car. You usually notice your car shuddering because itfeels like it's vibrating.
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