Allison 10L1000 Transmission Problems & Solutions 1-833-382-5427 | Monday - Friday | 8AM to 4PM PST Home Drivetrain 101 Allison 10L1000 Transmission Problems & Solutions Allison 10L1000 Transmission Problems & Solutions Next Gen Drivetrain Research & Development February 21, 2021 14 comments Introduction to the Allison 10L1000 Transmission: We decided to check the computers ability to properly operate the trim solenoids first. Transmission Fluid The hard shifting problem is often linked with low transmission fluid levels. CamperUpgrade.com is a participant of the Amazon Services LLC Associates Program, an affiliate advertising program it is designed to provide an aid for the websites in earning an advertisement fee by means of advertising and linking to Amazon.com products. The torque converter is filled with transmission fluid and therefore poor transmission fluid can make the converter behave strangely. 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. Copyright 2023 Mechanic Base. But one owner who has owned trucks with both transmissions has stated that the 10-speed is superior to the 6-speed. The term overdrive simply means the input shaft to output shaft speed ratio is lower than 1:1, and underdrive is higher than 1:1. In our research, we have come across information that states that Allison is not behind the new 10-speed transmission you find in the new GM trucks. When its quality degrades, it wont lubricate the components and lead to the hard shifting problem. Now it has developed losing the indicator under the cluster for drive on the dash and can happen while driving once that happens the tranny doesnt shift and starts to heat up. When the input shaft to output shaft speed ratio is less than 1:1, the tires will rotate more times for each one revolution of the crankshaft, equating to higher top speed. He mentioned how much money he had saved them, the time he took to get it right, and his courtesy to them. is a sticking valve in the vb deadheading pressure and causing the fluid to overheat in that fluid circuit, it will come out of limp mode, shift into fifth gear and the temp will drop back to normal range. add just the right amount of transmission fluid, 4 Common Coleman Mach RV Air Conditioner Problems (Troubleshooting). He informed the customer of what he had found, and that it might fix it. We have tested over time that the OEM Allison solenoids are the most reliable on the market, and they are the only Allison electronics we stock and use. 5 Common Flexsteel Recliner Problems (Troubleshooting), Want More Room? Besides, everybody has there own way to describe the same problem. An Allison Automatic uses the full torque from the engine and multiplies it with the torque converter. We found almost no difference in the commands to the trim solenoids from cold to hot. We were confident wed found the problem and could help the customer out with a repair. Save my name, email, and website in this browser for the next time I comment. Billet C2 hubs are imperative for anyone planning to tow heavy OR produce substantial power. Many people debating this topic simply say it depends. The most common reasons why an automatic transmission is shifting hard are due to transmission fluid issues, a bad transmission vacuum modulator, a failed transmission sensor, a bad shifter cable, or cold weather. So, If you do not know which fluid is suitable for your transmission system, consider going through the operator manual. The reason for this is because they are designed to never need replaced. The Valve Body- it can wear out fairly quickly but there are no regenerative options available. 1. Allison shift valves are very long with many different lands along them. The only way to prevent the system from overheating is by installing a cooler on it. Powertrain Expo
Plus, a third owner mentioned that the shifting is so smooth that it is hard to tell when it is shifting. Its also not difficult to replace the clutch. Once this problem is present, the valve body cannot be safely employed without substantial machining. that will most likely fix your problem. This will give it enough time to cool of the liquid before you remove it. Apart from the level, you will also need to check the condition of the transmission fluid. On manual transmissions, a failing or worn out gear synchronizer may be the culprit. you feel the cooler lines and the pan with you hand it is not over 180. replaced PSM flushed coolers, no change to issue. In order to do this, we must take cooling the transmission seriously. and ask about the replacement process. However, dealing with any internal transmission parts might lead to a rebuild becoming necessary. Both are good but the newer one has benefited from the upgrades in technological knowledge and capabilities. The C2 clutches function as the Overdrive clutch pack of the Allison 1000, hence why they are so prone to wanton stress. In fact, all of our hand-picked Allison 1000 High Performance Rebuild Kits include a complete set of OEM Solenoids, OEM NSBU and OEM Preasure Manifold Switch. If the VSS is faulty, the transmission may exhibit symptoms such as delayed shifts, hard shifts, and limited gear operation. Yes, there have been a number of problems with the Ford 10-speed transmission, including: Erratic movements and jerking. The fix is not to go past factory settings for the power. Spartan Chassis vs Freightliner: Whats The Difference? 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. believe the overheating is an internal issue. Your Allison transmission could be experiencing a part failure, in which case your best bet is to take advantage of the providers warranty. Should You Repair, Rebuild, or Replace Your Cars Transmission? temps above 250 and wont throw a code. Save my name, email, and website in this browser for the next time I comment. That is the question as there are many complaints about how these new transmissions operate on the road and while towing. On a recent trip to the lower peninsula of Michigan, we were approaching the Big Mack Bridge from the west, and I noted a very hard down shift of the transmission in the last couple of miles before the bridge. Although it is not unheard of for the intermediate and output shaft to fail, it is exceedingly more common for the input shaft to be the problematic shaft. still will not shift into rev (no reaction at all) and some, but not enough to move truck. Some issues, such as adjusting the shifter cable, can be a relatively easy fix. Press the gas pedal Once you have finished the previous step, you must step on the accelerator pedal. If the low levels are consistent, you want to hunt down the leak causing the system to lose fluid. Dont let a transmission in need of repairs bring your workplace to a halt! What You Need to Do Now - My Lemon Are you experiencing transmission problems with your GM 10 speed gearbox? When this cable fails, there could be issues as the gears change. Allison transmissions are custom-designed for several different industries and provide valuable power and work. So, be careful and add just the right amount of transmission fluid to the reservoir. 8. . He stated his only reservations depend on how long it had been driven like this, might have resulted in damage to the clutches. 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!) Finally, start your vehicle and leave it for some time to warm the oil. We will explain what this means below. Though the springs were good, the vacuum test on the trim A valve did not fare so well. Unsubscribe at any time. You can also keep the engine running when checking it. This concludes as a consistently balanced and concise shift, without any aggression. If theres anything out of place, switch them back and try again to see if you can duplicate the problem. During a trip through the Rocky Mountains in October 2008, we experienced unusual problems with the shifting in our Allison 3000 MH transmission (in a 2002 Winnebago Journey 32TD). 2. Before draining the worn-out transmission fluid, make sure to place a receptacle under the reservoir. Re: Allison problems. (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. Therefore, a failing speed sensor will have a direct impact on automatic transmission operation. It is a good upgrade that should help you tow over those mountain roads a lot better than you had in the past. Failure to engage the shift selector at the selector valve also causes unresponsive movement of the selector lever. After the repair, the trim A valve held 22 hg of vacuum. We bought a 1998 American Eagle, Allison 6 speed transmission, Cummins 350hp and had the same problem with the DO NOT SHIFT message. of this transmission, - Footnotes forGM AND Heavy Duty Commercial Vehicleowners. occurs, but not every time. However I don't think this would be a shifting problem. Allison transmissions built in the mid-2000s had a recall issued for their TCM module. This proved to be deeply unreliable over time. Throttle position that is an input via the modulator circuit. Replaced TCM and checked wiring back to trans still nothing. When they change the fluid they're not getting any of the fluid from above the pan. With proper maintenance and normal usage, Allison transmissions will last you a very long time with few problems. Here's what to look for to keep your vehicle shifting smoothly. There are not a lot of people calling it junk or calling for it to be removed from any GM trucks. Unlike manual and automated manual transmissions (AMTs), Allison Automatics have no . Operator selection that is an input via the selector cable and positions the selector valve. It wouldnt let me manually shift. If you have been facing the hard shifting problem lately, consider checking the transmission fluid level in the reservoir. But things may go wrong rather unexpectedly. 2016 GMC Sierra. Adaptivity Protocol also detects aggressive shifts and slows down the activation of the oncoming solenoid to minimize the aggression of the shift. This is why it is important to have sufficient fluid in the reservoir at all times. this was running at the 6gun on 3. there's only one gear in which it shifts hard, and its always aroudn the same speed. Rough shifting. try starting from a stop in tow/haul modesee if its any different. If your Silverado is shifting hard, and you get the check engine light, there may be a diagnostic trouble code stored in the memory. Slipping into neutral. Learn what might be happening and how to fix it here. Allison shift valves are very long with many different lands along them. His first thought was the C3 clutches, which work for third, fifth, and reverse. Some shops may also charge a flat fee for the rebuild, ranging from $2000-$4000. ), What Sealant Can I Use On a TPO Roof? The converters cover, facing the flexplate, is also made of very soft metal. This keeps the equipment lubricated so that It can move easily. A friend of mine recently had an Allison come into his shop with a customer complaint of slipping shifts after an extended drive. RELATED: 6 Causes of Manual Transmission Hard to Shift (Especially 1st to 2nd). Be the first to hear about discount opportunities, community events, new products and more. Allison valve bodies are notorious for one problem in specific, valve seizure. These have been tested in applications in excess of 1000HP, and are a must for any serious Allison 1000 Transmission Build. It is coupled with the Duramax diesel engine and that seems to be the perfect partnership. Come join the discussion about duramax engines, performance, builds, modifications, classifieds, troubleshooting, maintenance, and more! They also recommend this transmission without hesitation. Automatic vehicles often have a cable or linkage that connects the transmission to the shifter. Here's what to do now if your Ford or GM vehicle isn't performing how it should. One of the most common signs of a bad speed sensor is abnormal automatic transmission operation. Directly oiling the C3 clutch pack is a critical improvement to this transmission that allows us to encounter this transmissions maximum potential. the way the Allison shifts with increasing speed (when in normal mode, not tow/haul), is to go 1st gear, 2nd gear, 3rd gear, 4th gear, 5th gear, then like 5 mph/couple seconds later after the 4-5 shift, the converter locks up and stays locked all the time in 5th gear until your speed drops below 45mph. 4 Common Coleman Mach RV Air Conditioner Problems (Troubleshooting). If theres an issue with synchronization, a worn-out sleeve might be to blame. There are a lot of concerns about the Ford 10-speed transmission problems. No doubt, a transmission plays a key role in the proper functioning of your motorhome. The OEM Allison 1000 Transmissions C2 hub is a large failure point in this specific unit.