I found the cause of the P0325 and P0330 error codes. 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. During a shudder the desired will stay close to 0rpm but the act pid will go up and down in rpm. Shifting to third gear was accomplished by engaging the torque converter lockup clutch. Hence, you've commanded your torque converter every time your car shifted gears. Hydraulic slippage is much less desirable at cruising speed. Whether it will add to my working knowledge is debatable, but my brain will benefit from the workout. The action you just performed triggered the security solution. Well Aaron . The TC is a viscous coupling. 2. 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. The combination of a smaller-diameter and lighter converter means that less engine torque is required for acceleration. Basically, the fluid exits the center of the turbine and is redirected by the stator back into the impeller. You only monitor it when the converter is locked. 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. mroberthowell 4 yr. ago Thank you so much! As youll see if you look at the first one, the original iteration had three speeds forward and one reverse, for which it requires four epicyclic gearsets. 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)). Once engaged, the lockup clutch simply drove the output shaft at engine speed (not turbine speed). These a11y cookies normally expire after about seven days, but are removed immediately if you restore the applicable settings to their default values. Just thought I would share with everyone some recent learnings I've had with my 2010 EB Flex. This is how the first fluid couplings were designed, but they were hideously inefficient because of high slippage. by SirHandyMan Fri Mar 29, 2019 8:27 pm, Post (Google, Google Analytics, and other related marks and logos are trademarks of Google LLC. The annulus (purple) is held in reverse, idles in low, and rotates with the sun gears in direct drive. This website is using a security service to protect itself from online attacks. RPM. Turbine Input Speed Sensor. - Ford Powerstroke Diesel Forum The stator is called the middleman because it serves as the conduit that reverses transmission fluid and sends it back to a turbine impeller. I re-used the "new" valve body and decided to try out my original solenoid pack to avoid having to reprogram the PCM with the new calibration for the solenoid pack that came with the recycled transmission. 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. 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. 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. 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. I changed the transmission fluid (Mercon LV) at 63k miles back in 2017. (For each of these cookies, "xx" will be a cryptographic hash.) abs thank you for posting your experience here. Google, AdSense, Google AdSense, Google Analytics, and other related marks and logos are trademarks of Google LLC. 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. Primary symptom includes a "rumble strip" like sound randomly while driving at speeds of about 40+. 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. For more information about Google advertising, see the "Advertising" section of their Google Privacy & Terms site. But once they are damaged, you will experience fluid leaks. (author diagram). I never saw a problem with the converter, it never went over 3 to 4 RPM slippage at WOT with it locked. Twice last week, when I came up to a stop light, the engine bogged down to 400rpm then recovered back to normal idle. It's when you have a damaged torque converter seal that fluid leaks out and causes the overheating and damage. Cloudflare Ray ID: 7c0ed4b42f522a79 Thu Aug 29, 2019 1:33 am, Post With no slip at all. These early units operated on the same principal of using one electric fan to drive another. I did the trans relearn today with the Spartan 275 tune. Privacy Statement - 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. You are using an out of date browser. A 5 percent slippage factor means that if the impeller is spinning 3,000 rpm, the turbine is only spinning 2,850, or 5 percent slower. Fri Aug 30, 2019 10:22 am, You need to be a member in order to post a reply, Not a member? 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. 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). (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). I was towing my 5th wheel and the temp went up to 285. i called a trans shop and he had no answer,but it sounded strage to him. With automated hydraulic operation and combinations of brakes and clutches, it was possible to get the same results more efficiently. 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. Only lasts from .5 seconds to 2 seconds. I agree that a manual transmission option would be great. With the clutch engaged, Ultramatic also transmitted some drivetrain vibration that the torque converter would otherwise have absorbed. Keep reading to find out these common torque converter problems and how to fix them. If you are experiencing shuddering, also check your engine mounts. By logging into your account, you agree to our. Wilson pre-selectors were pretty well established technology, although not common, by the late 30s. One of the fundamental differences between a fluid clutch (a fluid coupling or torque converter) and a mechanical plate clutch is slippage. All rights reserved. Unlike a clutch where a friction plate makes physical contact with another plate and ideally the two rotate at exactly the same speed when fully engaged. 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. I had just bought an SCT with Gearhead tunes. Failing Torque Converter Clutch with Slippage - Ford Flex As an example, replace your spark plugs if they are original, replace air filter, replace PCV valve. 4. What to Do to Fix Your Contaminated Transmission Fluid. So, you can see how those would be preferred from a standpoint of cost and packaging! I just checked it yesterday and it was right at the full indicator with the transmission properly warmed up. 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Stall speed is measured in the car by applying the brakes and revving the engine in First gear against the brakes. Change Background Color (Note: This option sets cookies on your device to manage your color settings; see the Cookie Notice for details.). Required fields are marked *. About Us - Please register or login to enable Dark Mode. but the question is when i put my buddys obd code finder on it. 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). I was running the KEM 250 and 310 tunes. These cookies manage your cookie and privacy preferences. If governor pressure dropped below that threshold, the clutch would disengage. The stator is called the middleman because it serves as the conduit that reverses transmission fluid and sends it back to a turbine impeller. When I replaced my transmission and converter, I replaced two mounts and the two dog bones under the engine. Accessing certain posts or pages on this website may require you to enter a specific password. Except as otherwise indicated, all written content and images are copyright Aaron Severson dba Ate Up With Motor. Multiple different problems, some transmission related, some engine related, all resulting in driveability issues. A torque converter clutch (TCC) is an important element of automatic transmissions because it affects fuel economy and driveability. Although torque converters are ideal launch devices for. (author diagram). Over 10 RPM is real slip. This is not an official website of any automaker or automotive brand! If the engine isnt free to turn faster than the driveshaft at rest or extremely low speeds, the engine will stall! Ive been troubleshooting a low RPM with light acceleration shudder on my 2011 EcoBoost Flex. 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. Members can start their own topics & subscribe to topics This and the GM automatic history are probably the most definitive descriptions of these technologies on the Internet, excepting pure design and engineering treatises. Any slip is bad. 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. Torque converter clutch slip Scan tool values 99 GMC Pickup GM's 6L80 HP Tuning, DoD, and Torque Converters! This sounds really great, and it is. A reverse band surrounds a brake drum connected to the front carrier, which is also integral with the rear annulus (orange). 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 speed difference between impeller and turbine is simply lost to heat within the operating fluid. The cookies normally expire in about 10 days, and are not set at all if you do not access any password-protected content. Think of it as two fans facing eachother inside an enclosure. 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). 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. For additional information about how Google uses cookies and/or other technologies that may collect and/or process personal information, see the "Technologies" section of their Google Privacy & Terms site and the "Our advertising and measurement cookies" section of their Google Business Data Responsibility site, which includes a detailed list of cookies associated with Google advertising and measurement products. So I picked up a scan tool to save on the abundant diagnosing fees associated with owning a 2005 5.4 f150. Once the clutch plate is fully engaged against the pressure plate, both must turn together at the same speed. It stayed there(18.24) from 60mph to 90 when I let off of it. The result will be every car will have efficient, smooth, and comfortable rides. 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. 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. The car has just under 77k miles. 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). Transmission Range) start a datalog or have an assistant drive and watch Torque Converter Slip Actual (TCA) and Torque Converter Slip Desired (TCD). With a manual transmission, you are allowed the freedom to pick the starting-line rpm you want to apply when you dump the clutch. The impellers spun by the engine's crankshaft. There are tried and true methods for fixing the five common torque converter issues. 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 would be surprised if this is your issue at 81,000 miles.
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