torque converter slip actual vs desired

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. 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. The clutch plate itself, which was faced on both sides with cork, was splined at its hub to the transmission input shaft. Reaction torque locked the rear sun gear against the rear one-way clutch, driving the planet carrier and output shaft forward at 69.7% (1 / 1.44) of turbine speed. (author diagram). 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. Comments may be moderated. by Silver Flex SEL. 2011 Flex Limited AWD EcoBoost - Mediterranean Blue Metallic/Silver Roof. This viscous connection is transmission fluid. 6 speed/8 speed RWD/FWD Transmission Tuning (incl T43, T76, T87) T43 Torque Converter Desired Slip. 6l90 TCC apply ramp strategy. ECCC - HPTuners if I'm seeing "desired TC slip" of 1020rpm at all times wouldnt that pretty much guarantee the TC would never lock? A malfunctioning torque converter can have a shudder that comes from the transmission. Im not able to provide repair or maintenance advice, sorry! Theshuddering makes the car lagand is very noticeable. Estimate Converter Slip. The Vimeo Cookie Policy does not currently disclose the normal durations of the cookies and similar technologies the Vimeo platform uses, but it appears that some may remain in your browser (or other user agent) for as long as your settings permit. Sep 16, 2013 #11 4 Think of a lock TC as the clutches in your tranny. 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). This website is using a security service to protect itself from online attacks. Contaminated transmission fluid can cause damage to your converter parts and your transmissions parts. The combination of a smaller-diameter and lighter converter means that less engine torque is required for acceleration. That includes the advanced manufacturing technology being used in optimizing torque converters. With no slip at all. (At this point, an updated, expanded edition wouldnt go amiss, given all the subsequent development in CVTs and automatics with five or more speeds.). The faster it spins, the more force it provides, which causes the fluid to flow faster and harder. The mount on the transmission side (under the battery) was severely damaged, the rubber legs inside the bushing were torn through and was allowing a lot of engine movement. Think of it as two fans facing eachother inside an enclosure. Each PayPal payment or donation button may also incorporate a tracking pixel called "pixel.gif" (which loads from paypalobjects.com). First, that slip wastes some fuel youre paying for more engine revolutions (and more power) than reach the driveshaft. there were around 6 defaults that popped up. If you correctly enter the password, the site saves this cookie on your device to allow you access to the password-protected post or page. Fri Aug 30, 2019 10:22 am, You need to be a member in order to post a reply, Not a member? Some electrical tape and some plastic wire loom may solve your issue entirely. A torque converter clutch (TCC) is an important element of automatic transmissions because it affects fuel economy and driveability. The end result is the torque converterisn't able to transferthat power completely and efficiently from the engine to the transmission. Shifting to third gear was accomplished by engaging the torque converter lockup clutch. Its free and only takes a minute, Powered by phpBB Forum Software phpBB Limited. The multiplication factor is based on the speed difference between the turbine and impeller. However, that clutch was used in a distinctly different way than was Packards. Have you ever gotten in your car, started it up, put it in gear only to feel it shudder? I havent studied the Wilson preselectors in any great detail, but if youre curious, the applicable U.S. patents are US1404675 and US1796904. Your IP: When you coast in gear, the transmission attempts to drive the engine crankshaft, whose inertia causes a braking effect. 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. On early Ultramatic-equipped Packards, the lockup clutch would not engage until road speed reached at least 15 mph (24 km/h) even on a light throttle. by SirHandyMan Fri Mar 29, 2019 8:27 pm, Post check trans fluid. ), These third-party cookies may be set in connection with embedded video players for content hosted on the Vimeo video platform, for purposes such as (without limitation) managing video settings, storing video preferences, providing certain functionality (e.g., allowing you to pause a video at a particular point), associating your video viewing and other activity with your Vimeo account (if you have one), showing you advertising, ensuring proper functioning of the service, preventing abuse, and/or compiling user analytics data. However, that did not cure the shuddering problem. Manage Preferences - 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 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. The slipping occurs while you're driving or changing gears, and it usually comes with some odd noises too. Do Not Sell or Share My Personal Information. Locking the converter with a scan tool bypasses the tune and verifies everything mechanical is in order. Overdrive ratios drive the torque converter at speeds generally below normal coupling speed, creating increased slippage and heat, which is unacceptable. Your email address will not be published. Forum. This website is using a security service to protect itself from online attacks. Those gear ratios were in addition to the torque multiplication provided by the torque converter. Cookie Policy - Thanks for copying the information from my other post here. Impeller Pump The impeller pump receives the transmission fluid once it's delivered. register to join our community Welcome to the dark world of torque converters. Datalogging converter lockup question | SVTPerformance.com 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) 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. works great no real problems. The PYPF cookie normally expires in approximately four weeks, the 01A1 cookie in approximately one year. I drove only sticks for years by choice. This has been a quick jaunt through world of torque converters, but it should at least inspire some intelligent questions to ask your converter company of choice as to the best converter for your application. The _gat cookie, which may appear as _gat_gtag_UA_6113964_2, was sometimes set along with the _ga and _gid cookies to control how frequently requests were sent to the Google Analytics servers; this cookie typically persisted for only a few minutes at a time. 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. The car became basically undriveable. by Silver Flex SEL. (We have now DISCONTINUED our use of Google Analytics tracking on this website; see the "Online Tracking" section of the Privacy Policy for more information.) 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. its the mechanically controlled aod. But this shuttering is not caused by a disease. Keep reading to find out these common torque converter problems and how to fix them. The Fora platform includes forum software by XenForo. The GM team that designed Hydra-Matic was certainly familiar with the Wilson preselector. Your IP: The problems come in many sizes, shapes, and forms. The action you just performed triggered the security solution. The transmission fluid is an important part of the torque converter in that it is used to provide the fluid coupling and smooth starts and without stalling the engine when the vehicle is stopped in gear. by SirHandyMan Fri Mar 29, 2019 6:54 pm, Post Actual shows 640 rpm in drive with the brake on. The TCC solenoid regulates the fluid pressure to the clutch. Do Not Sell or Share My Personal Information -. Clutch material, bearing and bushing pieces, and a shiny metal flake appearance will be an indicator that things are coming apart inside. Some iterations of the Studebaker Automatic Drive/Borg-Warner DG started in first gear, but early transmissions started in second unless the driver manually selected Low. 3. and 5. The rear planet carrier is attached to the main shaft, which is also splined to the lockup clutch and drives the rear oil pump and governor (medium green). The annulus (purple) is held in reverse, idles in low, and rotates with the sun gears in direct drive. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. another masterpiece. A healthy plate clutch slips only briefly when engaged or disengaged. 4. and our (If you need to review or change these settings after you accept, you can do so from the Privacy Tools page.) by SirHandyMan Sun Apr 07, 2019 9:43 am, Post We arent saying 10RPM of slip is bad, what we are saying is that seems to be the progression point of going out. I purchased my car 3 weeks ago from a new car dealership.. sir im having an issue with my 93 f150 aod. For a better experience, please enable JavaScript in your browser before proceeding. Some persist for only a few minutes, or until you close your browser (or other user agent); others may remain in your browser (or other user agent) as long as your individual settings permit. 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. .. 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 i called a trans shop and he had no answer,but it sounded strage to him. Actual shows 640 rpm in drive with the brake on. I agree that a manual transmission option would be great. Advertising - The one for torque slip desired is 1020 rpm. It was followed in fairly short order by the 1950 Studebaker Automatic Drive, which took a somewhat different approach to the same problem. I have read and accepted the Privacy Policy I checked for codes and had none that explained why it happened. This is a remarkably broad, convoluted, and idiosyncratic field and theres a LOT I dont know. I think you probably have some time as long as you dont pound on it. For a drag-race car, the cost of this additional slippage is worth the price, but for a street car it creates other problems. There will typically be several such cookies, each beginning with "gdpr" (e.g., gdpr[allowed_cookies], gdpr&5Bprivacy_bar&5D, and gdpr[consent_types]). Contact Us - 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.
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