The magnet does pretty good in the bottom of the pan, but it doesn't catch it all! in a 6.6 LMM duramax application. Allison got its start as the Indianapolis Speedway Team Company back in 1915. As we said, the transmission is still relatively new and those problems may become more of a problem down the road. Directly oiling the C3 clutch pack is a critical improvement to this transmission that allows us to encounter this transmissions maximum potential. While many owners did not like the common problems associated with this transmission they did not bring a negative review about them. For heavy towing, or added power, a CNC Machined Billet Steel input shaft is imperative. 8. The customer agreed to the repairs and understood the situation. In some cases, its caused by a clutch with an uneven surface. The unit was introduced as a 5 Speed, despite having the ability to employ a 6th gear. With all of these complaints and problems, the review still states that this is a long awaited upgrade. The computer changes the duty cycle to the solenoids, which controls the pressure through the shift valves, and then on to a particular clutch. With a little research, you should be able to find one of those companies near you or near where you are traveling. Failure to engage the shift selector at the selector valve also causes unresponsive movement of the selector lever. However, its location may vary depending on the model of your RV. It took a little over a half an hour to get it to start flaring on the shifts. Legal/Privacy. Modern vehicles are as much about technology as they are about mechanics. The 4L60E transmission is a 4-speed GM programmed transmission planned for rear-wheel drive and four-wheel drive V6 and V8 cars, trucks, and SUVs. The oil also helps in keeping the device healthy and should prevent most problems with it. It wouldnt let me manually shift. You should only be putting 15000 miles max on the fuel filter. When the synchronizer ring is defective, it causes poor shifting and possible grinding noises. Our goal is for all of our built Allison transmissions to stay on the road until the end of their tenure. The engine control unit (ECU) needs to be updated. This means that there are 2 overdriven and 2 underdriven gears. 5 Common Flexsteel Recliner Problems (Troubleshooting), Want More Room? Fax 713.466.9839 Here are the two codes which came up: U1000: Class 2 Serial communication problem U1041: Loss of EBCM/EBTCM communication Would these two codes come up from an old fuel filter? The transmission system should now work without any problems. Which they did to confirm it has not had one issue, and they have put several miles on it. You should always replace them in pairs. It has a code P0700. will last you a very long time with few problems. You should take it into a Chevy dealer or anywhere you can get the tranny flushed. While the 6-speed is a good transmission and has been put in a variety of truck models, the 10-speed is just like moving from a cassette tape to a CD or a CD to a DVD. Slipping occurs when the transmission slips from one gear to the next, instead of gliding smoothly as it should. I just ran it on the highway; its either the 4-5 shift or the converter lockup. Allison combats this by doing the opposite, activating the oncoming clutch sooner to tighten up the inferior or poorly timed shift. Until the 2020 model years introduction of the Ford manufactured 10L1000, the Allison 6 Speed platform continued. Remember that the transmission fluid comes in different types. Most clutches should last over 100,000 miles, so this shouldnt be a regular occurrence. A Pop-Up Camper With Slide-Out Is the Answer. Many late model electronic transmissions have an Adaptivity Protocol system. However, when the transmission is shifting hard, it doesnt automatically mean theres a major problem. When its quality degrades, it wont lubricate the components and lead to the hard shifting problem. Symptoms of a bad valve body present as sloppier shifts than when the truck was new, or being quick to downshift under load. You can even consult the manual which should be able to guide you through this. Our testing was straight forward. In this guide, we evaluate what might cause the transmission to shift hard. This is one of the concerns many reviewers and car experts bring up in the content on their websites. Those are electrical communication trouble codes. It's a heck of a lot better than being in the dark. Instead, they hated the fact that GM sold off Allison more than they did those problems. The Allison may be the best of the bunch as it comes from a top transmission making company. It should have all the products that the company has in stock. These have been tested in applications in excess of 1000HP, and are a must for any serious Allison 1000 Transmission Build. You can click on them to read further information about the device. I would just worry about the fuel filter. Believe me I saw it first hand. If your system has poor fluid efficiency, consider reaching out to a trained mechanic. 6 Causes of Manual Transmission Hard to Shift (Especially 1st to 2nd), 7 Symptoms of a Worn or Bad Clutch (& Replacement Cost), 3 Symptoms Of A Bad Tire Pressure Sensor and Replacement Cost, 5 Reasons Why Your Brake Pedal Goes to the Floor, How to Check Automatic Transmission Fluid, Transmission Fluid Color Chart And What Each Color Mean, 6 Causes of Transmission Fluid Leaks and Repair Cost. This is generally a neutralization condition where NO clutch pack is in a synchronous state, which replicates the sensation of being out of gear. It is responsible for holding the C2 (Overdrive) clutches and synchronizes in speed to the input shaft on the 3-4 upshift. i have a 2001 seirra 8.1 with an allison, it runs fine 90% of the time. 6 Signs Of Low Transmission Fluid And How To Check the Level, 5 Symptoms Of A Bad Transmission Cooler and Replacement Cost, 6 Symptoms Of A Bad Transmission Control Module (TCM), 5 Symptoms Of A Bad Transmission Mount and Replacement Cost, Transmission Fluid Leak When Parked - Causes And Fixes, Car Wont Accelerate But RPMs Go Up: Causes & Fixes. RELATED: 6 Causes of Manual Transmission Hard to Shift (Especially 1st to 2nd). Subscribe Now Once this problem is present, the valve body cannot be safely employed without substantial machining. Dont let a transmission in need of repairs bring your workplace to a halt! 1-833-382-5427 | Monday - Friday | 8AM to 4PM PST, Top 5 Benefits of an Upgraded or Built Transmission. We found almost no difference in the commands to the trim solenoids from cold to hot. It is too thin, too small, and does not exhaust heat very well to name a few of those problems. In fact, when we cut the converter apart to begin manufacturing our popular Allison Torque Converters, we often see 6 distinct burn spots over the pads of the cover where the bolts thread in. The fix is not to go past factory settings for the power. The fluid capacity is based on the transmission stock with a shallow transmission pan. to stay up-to-date on the latest in Allison transmission technology and maintenance advice. The partnership started back in the 1930s. The issue with this is that it presents many places where the valve can hang up on a valve bore. We also show you a few ways to resolve the issue. This also goes for using the wrong fluid for your transmission system. As you can see, the final drive ratios are also included. If you add a reliable synthetic fluid to the transmission, you might alleviate issues with the temperature. All of the suggestions were performed with no success. A loose valve spring adjustment or stuck modulator valve causes problems during low and rough shifting. Yes, there have been a number of problems with the Ford 10-speed transmission, including: Erratic movements and jerking. A Pop-Up Camper With Slide-Out Is the Answer. As for the shifting from park, a loud noise means you probably parked on an incline. The Allison 1000, like most 6 speed transmissions, is a double overdrive. Spartan Chassis vs Freightliner: Whats The Difference? Low Gear Oil The manual transmission also requires fluid to keep the gears lubricated and running correctly. Reproduction in whole or in part without permission is prohibited. This plagues any low quality aluminum/magnesium valve transmission, for which the Allison is. #10. Allison transmissions are custom-designed for several different industries and provide valuable power and work. Typical problems of an Allison transmission include abnormal shifts, abnormal stall check speeds, slipping of the clutch and abnormal responses. Make sure that you check for supportability beforehand to ensure you dont run into any issues afterward. Owners have loved it when they put it in that mode and tow their trailers. Many users have complained about the hard shifting problem while using these transmissions. Line pressure was good, no codes have been set in any system, and no abnormalities with any sensors on the scan tool. This will be elaborated upon later in the article! Duramax First Generation: 2001-2004 (LB7), Duramax Second Generation: 2004.5-2005 (LLY), Fuel System, Air, Exhaust & Emissions Upgrades. Moreover, consider investing in a quality transmission fluid that can maintain its properties during winter. We won't send you spam. Make sure that you follow the guidelines provided by Allison for this process. The hazards: a reaction carrier is part of the transmission rotating assembly and is an important aspect of its operation. For many of the same reasons the C2 hub fails, the P2 Planetary also fails. If the shift selector linkage is unhooked, it may cause abnormal responses in the transmission. He also noticed the reverse engagement was rather soft. Another reason for the Allison Transmission system to give you shifting problems can be that it is heating up. (TPO Roof Sealant), Is The New Allison 10 SpeedAny Good?, What Year is a 10-Speed Allison Transmission?, Is The Allison 10-Speed a Real Allison?, How Much Horsepower Can The 10-Speed Allison Handle?, Common 10-Speed Allison Transmission Problems, Allison 10-Speed Transmission Reviews, Allison 6 Speed vs 10-Speed Transmission. That company did not make this new transmission but was built in-house by GM. Circuit leaks that we'd check, with other testing. Our Transmissions 101 on the Allison 10L1000 can be found here. The E Clutch Hub- is the most used clutch in this transmission and it is not made from very strong materials either. A friend of mine recently had an Allison come into his shop with a customer complaint of slipping shifts after an extended drive. Now it happened again last week and it wont move at all and the D just flashes. At Next Gen, we have spent years developing Allison transmissions that offer incredible longevity, stunning performance and staunch capability. Take advantage of our extensive warranty coverage to have your transmissions fixed or replaced with new models. The new models of transmission systems coming out from Allison are now controlled through computers. From what we have read, so far many owners do not encounter these problems but the transmission has only been out for about 2 years. Our next step was to let the vehicle sit overnight to cool off, and then drive it and monitor everything when it was working properly. Additionally, you can see our proprietaryAllison Transmission Products here!Allison LCT 1000/2000Product Resources:-LCT 1000/2000 Transmissions-LCT 1000/2000 Torque Converters-LCT 1000/2000 Rebuild Kits-LCT 1000/2000 Valve Bodies-LCT 1000/2000 PartsPopular Transmission Information Resources:-Top 5 Benefits of an Upgraded or Built Transmission-CalculatingTorque Multiplication Factor, Why is it So Important?- Top 5 Ways to Extend the Life of a Factory TransmissionIn this Drivetrain 101, we will be addressing: - The most popular failures we witness on theAllison LCT 1000 and 2000transmissions, - Its capabilities (or lack there of) in reference to TCM tuning and shift/lockup protocolmodification, - The strengths (believe it or not, there are a few!) The transmission fluid becomes thicker as the temperatures drop, leading to less lubrication. The torque converter is filled with transmission fluid and therefore poor transmission fluid can make the converter behave strangely. Vehicle lunging forward. 1. Make sure that all the lines are in their place. Therefore, it would be a good idea to refer to the operator manual to know about the model-specific information if you cannot find the dipstick. This concludes as a consistently balanced and concise shift, without any aggression. The Allison 1000 Transmission may have a strong reputation, but it is not without its array of flaws and inferiorities. This will also improve your vehicles overall functionality! The torque converter is located between the transmission and the engine to transfer the power from the engine to the wheels. At high shifting, this problem may be caused by a malfunctioning governor valve, leaking vacuum hose or broken mechanical actuator cable. I wasn't worried much about this at first until another problem started happening. Much like old hemi and Ford motors, the outer gear can get compressed to one side opposite the side where pressure vents, causing disproportionate centrifugal to wear. Thanks for the quick reply. Now, check the color of the fluid. add just the right amount of transmission fluid, 4 Common Coleman Mach RV Air Conditioner Problems (Troubleshooting). GM also put a Transmission Unique Number (TUN) and a Part Unique Number (PUN) on this transmission and if you change those numbers, without programming the new ones in the TCM, you could have shift problems. Dont keep driving a vehicle with a faulty part! Now clean off the gasket properly and make sure none of the older oil is left. This is because the cover flexes badly and those portions cant flex, causing them to be the only ones to burn. If you have been facing the hard shifting problem lately, consider checking the transmission fluid level in the reservoir. Check Engine Light. This is supposed to be an all new transmission design and there may still be a few bugs in the system. The installation procedure should be given along with the equipment. While they use the Allison name for their new transmissions, those devices are superior to previous models. However, this part is also found inside the transmission. It is at about 550HP that the LML and above input shaft begins to die, but approaches 600HP safely in the earlier years of DuraMax. If you find yourself stuck in third gear with this model of transmission, its probably time to have it rebuilt. You should not start the engine yet. We narrowed the possible causes down to solenoids, valve body, or internal hydraulic circuit leak. i'd think its 4 to 5. its when i'm running around 64-70mph when the truck is trying to shift UP. Leaking oil in the converter housing originates from a defective real oil seal, spoiled input charging pump or cracked converter assembly weld. The source of this problem could be obstacles building up in the governor, modulator, or valve body passages. As such, we will progress to analyzing the problems of this transmission, and how to understand, prevent and resolve them. . If the fluid color is on the pink side, it means that the fluid is good to use. To determine if you have this problem, you can put the valve body in a freezer overnight and see if the valves still move freely. Here is a more detailed list of the common reasons why an automatic transmission is shifting hard: The most common reason for your transmission shifting hard is due to fluid concerns. His first thought was the C3 clutches, which work for third, fifth, and reverse. Furthermore, it is seen that the transmission fluid loses its lubricative properties when overfilled. That may take a few years to rectify yet but right now the biggest complaint we have seen is that the transmission is not made by Allison Transmission Company. Fortunately, the scan tool we were using provided actual and desired amperage (figure 2). If the clutch is worn out, it could start to slip and prevent normal acceleration. The problem is that when in D '' the 3 to 4 shift the engine will flair. Then, dip it in the reservoir and pull it out after a few seconds. 2. Inside the transmission, gears are working hard to create a smooth ride. Change Your Address, Yes, I would like to receive emails from Gears Magazine. Please note, comments must be approved before they are published.