If you use the buttons to make a payment or donation, the PayPal services will set additional cookies (not listed here) to manage your PayPal login and transaction data (and potentially also for various other purposes, e.g., user analytics and/or advertising). It may not display this or other websites correctly. 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. and our I feel better and it makes more sense now. Each PayPal payment or donation button may also incorporate a tracking pixel called "pixel.gif" (which loads from paypalobjects.com). Well, I thought I did explain that in my reply post. Members can start their own topics & subscribe to topics Hydraulic slippage is much less desirable at cruising speed. But once they are damaged, you will experience fluid leaks. The turbine and lockup clutch driven plate are both splined to the transmission input shaft (medium blue). Your Transmission Fluid is Contaminated. 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. Submitting a comment signifies your acceptance of our Comment Policy please read it first! 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. Do Not Sell or Share My Personal Information. Performance & security by Cloudflare. Embedded video players for content hosted on the YouTube video platform (which is owned by Google LLC) may set these third-party cookies and/or use similar technologies to store data in your browser (or other user agent) for purposes such as (without limitation) managing video settings (e.g., tailoring the playback to your connection speed), storing video preferences, providing certain functionality (e.g., allowing you to pause a video at a particular point), showing you advertisements, associating your video viewing and other activity with your Google account (if any), ensuring proper functioning of the service, preventing abuse, and/or compiling user analytics data. Unsurprisingly, each engagement or disengagement of the lockup clutch felt like a shift, giving less technically knowledgeable drivers the mistaken impression that Ultramatic was a two-speed automatic. For people who want a broader overview, I would recommend a book by Philip G. Gott entitled Changing Gears: The Development of the Automotive Transmission, published by the SAE as part of their Historical Series in 1991. In the event we receive any compensation and/or other valuable consideration for any other content presented on this website, the nature of that compensation or consideration will be disclosed as part of the applicable content and/or otherwise adjacent to it. The second thing to look for is a lot of slippage between Desired and Actual readings for the TCC in Forscan. You also need to move forward with viable options that will help you get your torque converter fixed. The end result is the torque converterisn't able to transferthat power completely and efficiently from the engine to the transmission. A malfunctioning torque converter can have a shudder that comes from the transmission. In this schematic of a basic three-element torque converter with lockup clutch, the torus cover, lockup clutch pressure plate, and impeller (red) all rotate with the engine flywheel. You've now repaired or replaced your torque converter if it exhibited any of the above common torque converter problems. The cookieconsent_status cookie recorded whether or not you consented to analytics tracking and told the website to hide the notification banner; this cookie normally expires after about one year. Manage Preferences - That's because torque converters transfer the power your car engine makes to the transmission in your car. This is not an official website of any automaker or automotive brand! Tuning. Some electrical tape and some plastic wire loom may solve your issue entirely. 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. i called a trans shop and he had no answer,but it sounded strage to him. Part 3 of 3 High Performance Academy Sonnax and SIU - Mega Torque. At idle and very low road speeds, slippage is desirable because it keeps the engine from stalling or lugging in gear. Most street cars cannot keep the rear tires from spinning if you add too much throttle, and this tends to limit the stall speed. 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. I have read and accepted the Privacy Policy I wouldn't worry about it, but I'm not familiar with your specific transmission. As these vehicles age, diagnosing these issues can become more challenging. 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. This is why lifting off the throttle in a car with a fluid coupling or torque converter can feel almost like shifting into neutral. When I replaced my transmission and converter, I replaced two mounts and the two dog bones under the engine. You usually notice your car shuddering because itfeels like it's vibrating. I did the trans relearn today with the Spartan 275 tune. The stock converter wouldn't with a big tune unless I was cruising at light throttle. mroberthowell 4 yr. ago Thank you so much! In drive at 0 speed TCD should read 1020 rpm and TCA should be Engine RPM - Keep reading to find out these common torque converter problems and how to fix them. These a11y cookies normally expire after about seven days, but are removed immediately if you restore the applicable settings to their default values. Privacy Statement - (WordPress and the WordPress logos are registered trademarks of the WordPress Foundation in the United States and other countries. Think of it this way, a well built converter, 10" may slip 4-5%, if yours slips 6-7% higher, you are baking the fluid, cooking the band, and compromising the clutches, and giving up mph and ET. One or more wp-saving-post cookies may be set while creating and/or editing posts or pages, to help manage version control and the autosave feature; these cookies normally expire after about 24 hours. Clutch material, bearing and bushing pieces, and a shiny metal flake appearance will be an indicator that things are coming apart inside. ), These first-party cookies are used to manage user logins and certain other administrative functions of the WordPress content management system, e.g., post editing. by Silver Flex SEL. 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. Last fall, the external filter disintegrated and clogged up the cooler. AAMCO Centers are independently owned and operated. The valve was pushed open or closed by opposing pressures generated by a throttle-controlled valve and a centrifugal governor driven by the output shaft. When I replaced my transmission and converter, I replaced two mounts and the two dog bones under the engine. All rights reserved. This very similar to what I experienced with my failure. Actual shows 640 rpm in drive with the brake on. copyright 2023 AAMCO transmissions inc. Once engaged, the lockup clutch simply drove the output shaft at engine speed (not turbine speed). T43 Torque Converter Desired Slip. abs, do you have any recommendations on how to troubleshoot a failing torque converter using ForScan? by SirHandyMan Fri Mar 29, 2019 3:24 pm, Post Another fascinating article, thank you for all your effort! 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. There are tried and true methods for fixing the five common torque converter issues. (PayPal.com, PayPal, and all logos related to the PayPal services are either trademarks or registered trademarks of PayPal, Inc. or its licensors. Your IP: What to Do to Fix Overheating and Seal Damage. Estimate Converter Slip. PLEASE DON'T SUBMIT COPYRIGHTED CONTENT YOU AREN'T AUTHORIZED TO USE! I don't think they had this in 2011 however. The multiplication factor is based on the speed difference between the turbine and impeller. (If you need to review or change these settings after you accept, you can do so from the Privacy Tools page.) One is turned by the enginge. Comments may be moderated. Just thought I would share with everyone some recent learnings I've had with my 2010 EB Flex. Off.).) 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. Once your torque converter starts failing, you need to be knowledgeable about what torque converter problems will disable your car? It ran pretty good. So, you can see how those would be preferred from a standpoint of cost and packaging! Almost no one thinks of it, but when you drive your automatic transmission car, you're master over your cars torque converter. Required fields are marked *. Therefore, a lockup clutch needs to be accompanied by some mechanism to selectively engage or disengage the clutch. Not all the listed cookies and/or data items are necessarily set in all instances, and there may sometimes be others not listed above, particularly if you are logged into a Google account. That could be within the margin of error for the sensor. Because of the lack of traction and limited tires, it's not critical that a street engine launch at peak-torque rpm. The problems come in many sizes, shapes, and forms. Hydraulic slippage also offers some advantages during acceleration: As with a plate clutch, a certain amount of slip makes for a much smoother takeoff. Once governor pressure was sufficient to overcome the combined spring and throttle valve pressure, oil would be applied to the clutch cylinder, engaging the lockup clutch. In the diagram above, the yellow arrow again illustrates the flow of power, this time in third (top) gear. About Us - In fact, Cadillacs chief engineer ordered an early Daimler Double Six with the Wilson and Laurence Pomeroys Fluid Flywheel for evaluation purposes. Hence, you've commanded your torque converter every time your car shifted gears. Ultramatics lockup clutch was a hydraulically operated wet clutch located within the torque converter housing, between the engine flywheel and the converter turbine. Although this arrangement sacrificed some of the smoothness that was the main rationale for early automotive torque converter transmissions, it made Ultramatic more efficient than the early Dynaflow, at least at cruising speeds. In third gear, the Studebaker Automatic Drive/Borg-Warner DGs lockup clutch drives the transmissions output shaft at engine speed, providing a completely mechanical direct drive with no hydraulic slippage. Torque Converter Engaged while pulling??? We were wrong. works great no real problems. 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. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. ), 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. I havent studied the Wilson preselectors in any great detail, but if youre curious, the applicable U.S. patents are US1404675 and US1796904. A forum community dedicated to Ford Power Stroke owners and enthusiasts. The vehicle suffered a torque converter failure at around 140k miles. For comparison, a four-speed Wilson pre-selector has four planetary gearsets, four sets of brake bands, and a cone clutch, which is a lot of pieces. That should make you and your car happy. These torque converters allow some slippage but it should not vary much from the desired PCM value. These torque converters allow some slippage but it should not vary much from the desired PCM value. If you are experiencing shuddering, also check your engine mounts. By accepting all cookies, you agree to our use of cookies to deliver and maintain our services and site, improve the quality of Reddit, personalize Reddit content and advertising, and measure the effectiveness of advertising. The stator redirects fluid from the turbine to the impeller, radically increasing the force of the fluid entering the impeller and multiplying the torque input from the engine. This is due in part to the technological advances in torque converters. When the torque converter starts malfunctioning, you may feel shuddering and even slipping in overdrive. The cookies are not set at all unless you select that option when submitting a comment. A spring-loaded plunger valve controlled oil flow to the lockup clutchs hydraulic cylinder. 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. A multi-disc clutch can lock that carrier to the front sun gear, which is also attached to the rear brake drum (dark red). I am however, now chasing some unusual engine noises which are a different issue entirely. The issues of slippage and heat are the main reasons that street converters should be approached with a serious amount of compromise when it comes to stall speed. 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. I would suggest starting with the transmission upper mount and also a transmission fluid drain and fill. Second, consider draining and filling the transmission a few times since you can't get all the fluid out with just one drain/fill cycle. It stays between 0 and 5 RPM when locked. 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. With the torque slip PID on the DashDAQ. by Silver Flex SEL. Locking the converter with a scan tool bypasses the tune and verifies everything mechanical is in order. If the fluid becomes contaminated, anything that uses and relies on the fluid can be damaged. Terms of Service - I was towing my 5th wheel and the temp went up to 285. by SirHandyMan Fri Mar 29, 2019 6:54 pm, Post But Ive never heard of anyone going that route. It's not more specific because stall speed is highly dependent upon engine torque. Click to reveal Some vehicles have a transmission temperature indicator that will let you know when your car's transmission is overheating. Primary symptom includes a "rumble strip" like sound randomly while driving at speeds of about 40+. It's also important not to undersell converter weight as a contributing factor to maximizing acceleration. (Google, Google Analytics, and other related marks and logos are trademarks of Google LLC. Such cookies and/or stored data items may be set by various domains (such as, though not necessarily limited to, youtube.com; youtube-nocookie.com; googlevideo.com; ytimg.com; google.com; accounts.google.com; www.googleadservices.com; and/or doubleclick.net, which is part of the DoubleClick advertising service, also owned by Google LLC). A torque converter clutch (TCC) is an important element of automatic transmissions because it affects fuel economy and driveability. By logging into your account, you agree to our. 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. Sep 16, 2013 #11 4 In this diagram, the yellow arrows show the power flow in second gear. 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. * Various services, specials, or coupon offers are available at participating locations only. If governor pressure dropped below that threshold, the clutch would disengage. 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. In first, the low band and one-way clutches held both sun gears, causing the ring gears to drive the planet carrier and output shaft at 43.3% of turbine speed (1 / 2.31). If this is your first visit, be sure to check out the FAQ by clicking the link above. The TC is a viscous coupling. There are many different types oftorque converter problems. Okay, so it sounds like you were able to identify a potential root cause. 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. California residents also have the Right to Opt-Out of the sale of their personal information see the Do Not Sell My Personal Information page. Second, the nonlinear relationship between impeller and turbine speed can be troublesome. This creates the greatest speed difference between the turbine and the impeller and therefore the maximum torque multiplication. 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In second, the low band was released and the multi-disc clutch engaged, causing both ring gears to rotate at turbine speed. However, that did not cure the shuddering problem. You can email the site owner to let them know you were blocked. Sure, there's all kind of talk about stall speed, slippage, and lockup features, but some gearheads secretly believe there's as much voodoo to a torque converter as there is science.

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