if someone would have put in a used ecu ,fron a electric controlled aod. Contaminated transmission fluid can cause damage to your converter parts and your transmissions parts. It took the addition of a small device called the stator to increase the efficiency of the fluid coupling and transform it into a torque converter. by SirHandyMan Wed Mar 27, 2019 12:52 pm, Post 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? If the engine is not running smoothly and/or delivering consistent power, it can cause fluctuation in the "Desired" versus "Actual" torque converter clutch slippage along with a surging feeling. Anyway, I downloaded FORscan on my laptop and loaded several pids for the transmission. 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+. However, that did not cure the shuddering problem. Accessing the login page sets the wordpress_test_cookie, a session cookie that tests whether the user's browser (or other user agent) will allow the cookies needed to log in to the administrative dashboard; this cookie normally expires when the user closes their browser (or other user agent). register to join our community 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)). What to Do to Fix Slipping or Shuddering. 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. Input output shaft readings are almost exactly the same when driving. The Vimeo Cookie Policy also provides information about how Vimeo users can control the use of third-party analytics and/or advertising cookies in connection with embedded Vimeo video players. Most street torque converters tend to operate in the 3 to 5 percent slippage range, but this can go as high as 8 percent. To resolve the issue, I have reduce the desired slip to 10 rpm in 3-6th gear and increased the + side of the apply ramp table by about 10% across the board and up to 30% in the slip rpm of 2-12. 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). Doesn't seem to coincide with vehicle shifting though. 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. The slipping occurs while you're driving or changing gears, and it usually comes with some odd noises too. Currently the vehicle is much better to drive. 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 changed to the Spartan V2 a few weeks ago. 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). A high-stall converter like a 4,000-rpm unit is not only lazy from a part-throttle-efficiency standpoint, but it also generates much more heat. Thu Aug 29, 2019 9:39 am, Post Studebaker-Packard (the two companies merged in 1954) dropped both of these transmissions after the 1956 model year. One thing Ive always wondered about was if any manufacturers looked into Wilson pre-selector gearboxes as a basis of an automatic. The car became basically undriveable. With automated hydraulic operation and combinations of brakes and clutches, it was possible to get the same results more efficiently. Last fall, the external filter disintegrated and clogged up the cooler. For more information about what data PayPal services collect and how that data may be used, visit the "Legal Agreements for PayPal Services" page to review the PayPal Privacy Statement and Statement on Cookies and Tracking Technologies that apply in your location (the Statement on Cookies and Tracking Technologies that applies to each region is linked from within the applicable PayPal Privacy Statement). During a shudder the desired will stay close to 0rpm but the act pid will go up and down in rpm. 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. (At present, this setting does NOT affect the payment or donation buttons that may appear on portions of the site's administrative dashboard, nor does hiding the box affect any cookies that may have already been set). 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Also, engaging a lockup clutch will prevent a torque converter from multiplying torque. The combination of a smaller-diameter and lighter converter means that less engine torque is required for acceleration. Unlike a reduction gear, this speed reduction doesnt multiply engine torque. Vehicle weight is another major factor that should be considered when selecting a converter. Transmission Range) start a datalog or have an assistant drive and watch Torque Converter Slip Actual (TCA) and Torque Converter Slip Desired (TCD). The only problem - there's a boat-load of information and I only know how to interpret a fraction of it. They may persist for up to two years. A healthy plate clutch slips only briefly when engaged or disengaged. * Various services, specials, or coupon offers are available at participating locations only. If you change certain aspects of the site's appearance using the accessibility sidebar, it may set these cookies to manage and remember your settings. 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. For example, if engine speed is 2,500 rpm, the turbine might only turn 2,375 rpm: hydraulic slippage of 5%. Torque converter problems have a high impact on your car's ability to function and drive. by SirHandyMan Fri Mar 29, 2019 6:54 pm, Post The effective dates of the current versions are: Paid advertisements and/or sponsored links on Ate Up With Motor will be identified with words such as "Sponsor," "Sponsors," "Sponsored Link(s)," "Sponsored Content," "Ad," "Advertisement," "Advertisement(s)," or "Paid Promotion" (and/or by images or icons containing such words). Except as otherwise indicated, all written content and images are copyright Aaron Severson dba Ate Up With Motor. Cloudflare Ray ID: 7c0ed4b42f522a79 Accessing certain posts or pages on this website may require you to enter a specific password. what is the protocol using AE to diagnosis torque slip. It ran pretty good. 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. I changed the transmission fluid (Mercon LV) at 63k miles back in 2017. 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). I would suggest starting with the transmission upper mount and also a transmission fluid drain and fill. 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). Unfortunately, additional stall speed also increases the slippage in the converter. It stays between 0 and 5 RPM when locked. (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.) 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. :whs: I was seeing 200-300 on the 310 with the stock converter but still felt really strong! To serve up a little enlightenment, let's take a spin through the torque-converter world and make some sense out of all the superstition. Overdrive ratios drive the torque converter at speeds generally below normal coupling speed, creating increased slippage and heat, which is unacceptable. All other trademarks and/or service marks are the property of their respective owners. The one-way stator clutch (fuchsia) allows the stator (light blue) to freewheel in the direction of engine rotation, but reverse rotation locks the stator against the fixed stator shaft (dark gray), providing torque multiplication under some conditions. This is why a disc clutch must be disengaged or the transmission shifted to neutral whenever the vehicle stops. 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. The Fora platform includes forum software by XenForo. This is not a huge factor in the overall lower-e.t. There will typically be several such cookies, each beginning with "gdpr" (e.g., gdpr[allowed_cookies], gdpr&5Bprivacy_bar&5D, and gdpr[consent_types]).