torque converter slip actual vs desired

Studebaker-Packard (the two companies merged in 1954) dropped both of these transmissions after the 1956 model year. To learn more about how Google may use information collected by the Google Analytics service, 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, and the Google Privacy Policy. 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). 4. Wallace Racing - Converter Slip Calculator The stock converter wouldn't with a big tune unless I was cruising at light throttle. 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. 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. Failing Torque Converter Clutch with Slippage - Ford Flex Do you want them slipping when driving? The one for torque slip desired is 1020 rpm. 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Locking the converter with a scan tool bypasses the tune and verifies everything mechanical is in order. Like the contemporary Buick Dynaflow, Ultramatic was designed to operate most of the time in its direct drive top gear. Your Transmission Fluid is Contaminated. As the new owner of a 92 Alante with the viscous clutch I wondered what the difference was. With the clutch engaged, Ultramatic also transmitted some drivetrain vibration that the torque converter would otherwise have absorbed. Akamai is a registered trademark or service mark of Akamai Technologies, Inc. in the United States (Reg. I would suggest starting with the transmission upper mount and also a transmission fluid drain and fill. Wallace Racing BACK to Auto Math. Filling the cylinder with pressurized oil would lock the pressure plate to the clutch plate itself, forcing the clutch and input shaft to rotate with the torus cover at engine speed. Anyway, I downloaded FORscan on my laptop and loaded several pids for the transmission. I had unlimited tow loaded and he thought maybe it wasn't playing nice with my trans. The torque converter is so essential to the global car market theres a global torque converter market. These cookies manage your cookie and privacy preferences. Those gear ratios were in addition to the torque multiplication provided by the torque converter. These a11y cookies normally expire after about seven days, but are removed immediately if you restore the applicable settings to their default values. Second, the nonlinear relationship between impeller and turbine speed can be troublesome. i take it your a writer and not a trans guy ,but maybe someone could answer the question. By changing the angle of the impeller blades, the torque-converter manufacturer can create a converter that generates a given stall speed with a certain torque multiplication. 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. T43 Torque Converter Desired Slip. Therefore, a lockup clutch needs to be accompanied by some mechanism to selectively engage or disengage the clutch. Whether it will add to my working knowledge is debatable, but my brain will benefit from the workout. If it does go let us know. 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. 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. Although torque converters are ideal launch devices for. but the question is when i put my buddys obd code finder on it. For example, in park, it will say Desired Slip 1200, Actual: 730 (guess the engine rpm) As speed increases, the Desired Slip drops (don't remember exact numbers) as well as the actual. The slipping occurs while you're driving or changing gears, and it usually comes with some odd noises too. Its free and only takes a minute, Powered by phpBB Forum Software phpBB Limited. It does drove different than a lock up. scheme, but it does contribute. and our Happens roughly 1-3 times in 30 mile drive at speeds of up to 60mph, and much more frequent at highway speeds (70+). Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. I think you should check the fluid level first and foremost. 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)). You can email the site owner to let them know you were blocked. However, even at coupling stage, the turbine still turns somewhat slower than the impeller. It may not display this or other websites correctly. Think of it as two fans facing eachother inside an enclosure. 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. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. I took it to my mechanic and he too found nothing wrong. 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. Hence, you've commanded your torque converter every time your car shifted gears. I drove only sticks for years by choice. The action you just performed triggered the security solution. 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 TCC solenoid regulates the fluid pressure to the clutch. (Google, Google Analytics, and other related marks and logos are trademarks of Google LLC. When you submit a comment, you may have the option save your information for future comments, storing the info in these cookies. 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. About Us - Torque converter problems have a high impact on your car's ability to function and drive. (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.) 91.234.33.200 (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. 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. Torque Converters - Unlocking The Secrets - Car Craft Magazine - MotorTrend With a manual transmission, you are allowed the freedom to pick the starting-line rpm you want to apply when you dump the clutch. To learn more about what information the Vimeo platform collects and how that information may be used, see the Vimeo Privacy Policy. works great no real problems. 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. It stayed there(18.24) from 60mph to 90 when I let off of it. For more information, please see our This is a red flag that lets you know you may need an expert to repair it for you. ), These cookies were previously used by the Google Analytics service to collect information about visitors and their use of the Ate Up With Motor website. This is why a disc clutch must be disengaged or the transmission shifted to neutral whenever the vehicle stops. The second thing to look for is a lot of slippage between Desired and Actual readings for the TCC in Forscan. Thu Aug 29, 2019 9:39 am, Post 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. All engine power flows through the mechanical clutch directly to the input shaft. Many times, people think there is something wrong with their transmission when the problem lies with their torque converter. 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. This slowly turns the blades of the driven fan in the same direction. 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. Privacy Statement - The replacement was a cheaper and somewhat simpler Borg-Warner unit which Studebaker-Packard called Flightomatic that deleted the DGs lockup clutch. Your Transmission Gear Ratio at Finish Line. T43 Torque Converter Desired Slip - EFILive 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+. At some point Ford modified the wiring to include a thick rubber insulator on the wires that extended beyond the edge of the intake manifold to prevent the chaffing. Crazy Egg is a trademark of Crazy Egg, Inc. Optimizely is a registered trademark of Optimizely, Inc. in the United States, EU, and elsewhere. A converter that might have a stall speed of 5,000 rpm for a pure drag car would be completely miserable on the street. Remember, you don't experience either symptom unless you have the wrong amount of fluid or the wrong fluid in the transmission. 10r80 Cars on the Dyno - TCC lock S or D - Mustang6G For a drag-race car, the cost of this additional slippage is worth the price, but for a street car it creates other problems. What to Do to Fix Overheating and Seal Damage. Torque Converter Slip Measurement / Diagnosis | Ford Explorer - Ford Third, make sure that your engine is running right because a transmission chuggle can be caused by many things. 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. Well, I thought I did explain that in my reply post. To avoid stalling or lugging the engine, the clutch would automatically disengage if road speed fell below 13 mph (21 km/h). This is not a huge factor in the overall lower-e.t. Over 10 RPM is real slip. 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. One way to minimize coupling slip is to supplement the fluid clutch with a plate clutch that engages when the vehicle reaches cruising speed. Your car's automatic transmission has a torque converter. I would be surprised if this is your issue at 81,000 miles. These early units operated on the same principal of using one electric fan to drive another. Plugging it back in all the way and resetting the PCM took care of that problem. Torque Converter slippage | PowerStrokeArmy 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. (author diagram). Its job is to smoothly convert engine torque into hydraulic pressure that your transmission uses to engage and shift gears. But Ive never heard of anyone going that route. That includes the advanced manufacturing technology being used in optimizing torque converters. I was monitoring some Torque converter params for my 4R55E with my in dash scantool. My truck was still putting down 575 on Dunbar's dyno with 100 RPM of slip.. im seeing 20rpm slip at most on my KEM 345, i know thats different. by SirHandyMan Sun Apr 07, 2019 9:43 am, Post Once the vehicle is moving at a constant speed, the speed difference between the impeller and turbine diminishes, eventually reaching a minimum point known as coupling stage. Diagnosing a potential Torque Converter problem with a Scan tool Most Torque Converters today also use a friction clutch to lock up the converter at higher speeds to create more fuel efficiency and less slip. 51.91.16.67 A manufacturer's torque-converter rating is generally expressed as an rpm range. Ive been troubleshooting a low RPM with light acceleration shudder on my 2011 EcoBoost Flex.
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