torque converter slip actual vs desired

There will typically be several such cookies, each beginning with "gdpr" (e.g., gdpr[allowed_cookies], gdpr&5Bprivacy_bar&5D, and gdpr[consent_types]). Failing Torque Converter Clutch with Slippage - Could be your TCC Solenoid, Re: Failing Torque Converter Clutch with Slippage - Could be your TCC Solenoid, https://www.ecoboostperformanceforum.co 733.0.html. (not Diameter) The logic of these schematics, which are not to scale and which have been greatly simplified for clarity, is that each color represents a set of components that are integral or otherwise connected so that they always rotate together; clutches, brake bands, planet pinions, and flywheels are shown in black or gray. (For more information about our discontinuation of Google Analytics tracking on this website, see the "Online Tracking" section of the Privacy Policy. The multiplication factor is based on the speed difference between the turbine and impeller. With the clutch engaged, Ultramatic also transmitted some drivetrain vibration that the torque converter would otherwise have absorbed. I had just bought an SCT with Gearhead tunes. What to Do to Fix Overheating and Seal Damage. How much torque converter slip is OK? | Chevy Nova Forum I was towing my 5th wheel and the temp went up to 285. For example, if engine speed is 2,500 rpm, the turbine might only turn 2,375 rpm: hydraulic slippage of 5%. I just checked it yesterday and it was right at the full indicator with the transmission properly warmed up. I took it to my mechanic and he too found nothing wrong. (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.) Primary symptom includes a "rumble strip" like sound randomly while driving at speeds of about 40+. The confusion stems from the symptoms of a failing transmission, and a failing torque converter is very similar and linked. Any slip is bad. One is turned by the enginge. I've got reason to believe my torque converter is going out, which readings can I look at to determine if that's actually my problem? With a plate clutch, that effect is often quite pronounced, especially in a reduction gear, because of the mechanical connection between the engine flywheel and the transmission input shaft; neither can overrun the other. I am however, now chasing some unusual engine noises which are a different issue entirely. Ive been troubleshooting a low RPM with light acceleration shudder on my 2011 EcoBoost Flex. The downside to these converters is that they are heavier and more expensive than non-lockup converters. After logging in, the wp-settings-UID cookies store the logged-in user's configuration settings, while the wp-settings-time-UID cookies record the time those configuration settings were last set; again, there may be multiple iterations of each of these cookies, which normally expire after about one year. Actual shows 640 rpm in drive with the brake on. When I replaced my transmission and converter, I replaced two mounts and the two dog bones under the engine. But Ive never heard of anyone going that route. 91.234.33.200 He wondered if something internal may be damaged and the tow tune showed it up not allowing the torque converter to unlock soon enough which caused the bog down issue. Since the 1940s, automakers have come up with a variety of strategies for reducing or eliminating that slip, including series parallel split torque transmissions and different types of converter lockup clutches. Input output shaft readings are almost exactly the same when driving. There is going to be some slip. For all the administrative and login cookies described here, "xx" will be a cryptographic hash while "UID" will be the administrative user's user ID number in this website's WordPress database. One thing Ive always wondered about was if any manufacturers looked into Wilson pre-selector gearboxes as a basis of an automatic. This very similar to what I experienced with my failure. Off.).) You usually notice your car shuddering because itfeels like it's vibrating. 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+. 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. It stayed there(18.24) from 60mph to 90 when I let off of it. Achieving a true 1:1 speed relationship between the turbine and the impeller is not possible with a non-lockup torque converter since it is still a fluid coupling. Ate Up With Motor, its logo, and other associated icons and graphics are trademarks and/or service marks of Aaron Severson dba Ate Up With Motor. Also, as we explained in the sidebar of our article on GMs other early automatic transmissions, torque converters utilize the speed difference between the driving and driven torus members to multiply engine torque. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Terms of Service - If we have enabled multi-factor authentication (which requires an authentication code as well as a password to log into the administrative dashboard), the iThemes Security plugin may also set the itsec_interstitial_browser cookie during the login process. 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." The one for torque slip desired is 1020 rpm. if someone would have put in a used ecu ,fron a electric controlled aod. During a shudder the desired will stay close to 0rpm but the act pid will go up and down in rpm. With the advent of overdrive automatic transmissions like the TH200-4R, the TH700-R4/4L60E, the massive 4L80E, the Ford AOD, and all the rest, the new-car companies were striving for improved fuel economy using overdrive. This is most noticeable from about 1200-1800 rpm. if you dont hammer on it everyday it will last you a long time.. my stock converter had 350 rpms of slip on How exactly are you measuring how much the tc is slipping? The DG series transmissions were notionally three-speed automatics (although early iterations were designed to start in second gear) with a torque converter lockup clutch. Just thought I would share with everyone some recent learnings I've had with my 2010 EB Flex. To fix the problem, you need to discover the seal that's damaged and have it replaced. A healthy plate clutch slips only briefly when engaged or disengaged. It is the lack of fluid that causes overheating, slipping, or shuddering. However, Wilson gearboxes were quite bulky and complex because the nature of their operation required a separate set of epicyclic gears for each ratio, including reverse. Once engaged, the lockup clutch simply drove the output shaft at engine speed (not turbine speed). Those gear ratios were in addition to the torque multiplication provided by the torque converter. Stator The stator is called the middleman. Well, I thought I did explain that in my reply post. Think of a lock TC as the clutches in your tranny. .. 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 If you are experiencing shuddering, also check your engine mounts. Accessing certain posts or pages on this website may require you to enter a specific password. With automated hydraulic operation and combinations of brakes and clutches, it was possible to get the same results more efficiently. The one for torque slip desired is 1020 rpm. Theglobal torque converter marketcontinues to grow and expand at a CAGR of 4.54%, which is projected until 2021. Most street cars cannot keep the rear tires from spinning if you add too much throttle, and this tends to limit the stall speed. Ate Up With Motor's Terms of Use and Privacy Policy may be revised from time to time. If governor pressure dropped below that threshold, the clutch would disengage. The annulus (purple) is held in reverse, idles in low, and rotates with the sun gears in direct drive. Your email address will not be published. The torque converter of the future will have a carefully tuned control strategy, which takes into account the torque demands of each vehicle. The iThemes Security plugin may also set the itsec-hb-login-xx cookie, which helps to protect the site against "brute force" hacking attempts; that cookie normally expires in about one hour. The image file itself contains no personally identifiable information, but the loading of that file may be used to help identify and/or track you. Torque converter seals can get damaged for several reasons. This is a session cookie that verifies that the user has entered valid user credentials pending receipt of the correct authentication code; the cookie normally expires when the user closes their browser (or other user agent). I cant imagine the hours of work which you must have put into understanding these various transmissions, to say nothing of writing up a description that a simpleton like me could (mostly) understand. The _ga and _gid cookies, which were only placed if you clicked "Accept/Enable" in the notification banner, enabled the Google Analytics service to track your activity on the site. New to the site and found it because of this read. Think of it as two fans facing eachother inside an enclosure. I no longer monitor the forum, please either post your question or create a, I am just trying to see how the management of this company can justify ignoring, or walking away from the T43 stuff right now, I am aware of the size of the Dodge Diesel market.I for one do not care about Dodge Cummins products, I have turned so many of my customers onto EFI Live from HPT or SCT that it kills me to have to tune a TCM with one software and ECM with another. 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. Almost no one thinks of it, but when you drive your automatic transmission car, you're master over your cars torque converter. ), 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. Akamai is a registered trademark or service mark of Akamai Technologies, Inc. in the United States (Reg. Basically, the fluid exits the center of the turbine and is redirected by the stator back into the impeller. Logging in sets the wordpress_logged_in_xx, wordpress_sec_xx, and/or wordpress_xx cookies, which store the user's login credentials to allow access to the administrative dashboard and other administrative functions; there may be multiple iterations of each cookie. Thu Aug 29, 2019 1:33 am, Post (author diagram). As an example, replace your spark plugs if they are original, replace air filter, replace PCV valve. i called a trans shop and he had no answer,but it sounded strage to him. We were wrong. Torque converters can be serviced or replaced as a single unit. By logging into your account, you agree to our. This is due in part to the technological advances in torque converters. But now with the Spartan 275 I am seeing 18.24 at WOT with the converter locked. but my truck has 25k on it and 10k tuned.. so im thinking mines not on the way out and its got 20rpm slip. Manage Preferences - This website is using a security service to protect itself from online attacks.

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