An automatic transmission can shift hard, jerk or hesitate for a number of reasons. I just ran it on the highway; its either the 4-5 shift or the converter lockup. I work at a fleet of around 450 buses and we have about 150 buses with the Allison 2000 series transmission. Transmission fluid should be reddish in color and largely transparent. Unusual . Pete . would that cause it to lock up only when shifting at higher gears? I think the 6.44 gear … This does not sound serious, the Allison Transmission is Heavy Duty and is one of the best designed and most reliable Transmissions produced. Share this conversation. I guess one needs to understand what down shifting hard really means. Friday the truck got stuck in 5 gear. Check with an Allison authorized dealer as there was a hard shift problem being investigated about age of your MD3060. Had it towed in and now they are saying the filter is plugged and also the fluid coloring is "off" and looks like it is almost fluorescent in color. 18 Posts . Satisfied … If the transmission is slipping, repair as needed. Switching to a high-quality synthetic transmission … try starting from a stop in tow/haul mode...see if its any different. Here's what to look for to keep your vehicle shifting smoothly. It would also have a occasional flare in the 2-3 upshift under moderate acceleration, under heavy acceleration there was no issue. Make sure you are putting in a 5 speed Allison … In fourth pulling a hill no problem, then downshift to third still pulls fine with no increase in temp. While the Allison 1000 does indeed have one of the strongest geartrains of any diesel transmission, it runs into the same converter and clutch slippage issues as other transmissions as the power is raised. If it’s shifting to … 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). Check transmission operation; if it seems to be working properly, check the appropriate sensor inputs. Discussion in 'Trucks [ Eighteen Wheelers ]' started by NFDDJS, Sep 20, 2015. allison transmission shifting problems Home. You can reset the 4-5 shift adapt by it self with a Tech 2. A problem with one or more of the solenoids can cause a lack of pressure, resulting in hard, soft or delayed shifts. mileage 150,000K/90,000Miles .Thanks to all of the awesome articles posted - big thanks. Dec 17 2013, 8:23pm. When the transmission shifts hard, it can damage internal components including valve bodies, hydraulic lines, and in some cases mechanical gears. Transmission Mechanic: Gm Tech Cam, Service Technician replied 6 years ago. Allison 3000/4000 series transmission technical tips T he The Allison world series transmissions models 3060,3560,3000,3066,B300,B400 (R) 4060,4560,4500,B500 (R) models and variants are found in large variety of truck chassis and busses. A loose valve spring adjustment or stuck modulator valve causes problems during low and rough shifting. The transmission oil pressure switch is unique in that its sole purpose is to collect data about the pressure found inside the transmission case, which impacts the timing and operation of shifting a vehicle to a higher or lower gear if needed. Come join the discussion about duramax engines, performance, builds, modifications, classifieds, troubleshooting, maintenance, and more! Allison Transmission (NYSE: ALSN) is the world’s largest manufacturer of fully automatic transmissions for medium- and heavy-duty commercial vehicles and is a … Posted - 03/02/2005 : 6:51:31 PM . Transmission shift solenoid problems can be expensive to fix. Here is a list of practical things that most people can do when their transmission is shifting too hard. There are just too many specialized tools and pieces of equipment you'll need, and buying this expensive gear just to screw up your first three tries at fixing the thing just doesn't make too much sense. Took it to the dealer 4 times they "reprogrammed it" and nothing changed. The transmission control module is the driving force behind the mechanism of an automatic transmission. Nov 7, 2012 #4 wsucougarx Well-known member. At high shifting, this problem may be caused by a malfunctioning governor valve, leaking vacuum hose or broken mechanical actuator cable. Location Salina, Kansas. Then you have to stop playing hard or do the trans upgrade. Well there you have it: the most likely causes and possible cures for the most common problem plaguing the Allison LCT1000 transmission: inhibited shifts or gear ranges. Be sure to have your model build and serial number. The best way to describe it is the transmission feels like its catching up when I … I was able to troubleshoot my 02' 2500HD Dmax LB7 5spd auto, approx. Hi mate I had the same problem with a camper once and the only way that you will ever stop it from shifting hard into gears down shifting or up is to take it into a Detroit Allison work shop and ask them to reset the throttle position and reset Un-adaptive shifts then to do an Fast-adaptive shift with the electronic tool called Allison Doc. I'd be interested in what kind of duty the truck has experienced and also, what the transmission service record is … Show Less. ... Allison 1000 Overdrive Shift Problem (1 2) geofferyh. Category: Transmissions. Fluid is full and clean. 27. allison transmission shifting problems. If your transmission is low on fluid, or if the fluid is old and discolored, it could be to blame for the hard shifting. 1,198 Posts . Speedometer quit and trans seemed to be stuck in 2nd, shifted hard into reverse. 2006 c2500: Duramax..allison..shifting hard in 3rd and 4th gear.Then Have 2006 C5500 Duramax with allison trans.It is 1000 series.Just had it rebuilt.Worked fine for about 300 miles.Started down shifting hard in 3rd and 4th gear.Then it started shifting hard also.Calle … "Do not get concerned by occasional hard downshifts, they will smooth out over time". CCSteve. We have a 2016 Tiffin Phaeton 40 QBH with 380 Cummins and Allison 3000 transmission. If you have flogged your Ally pretty good then you have a problem with C3 clutch and your adaptive learn has set the pressure as high as it can. In a small number of cases, a transmission fluid flush can help with shifting issues, but it depends on how damaged the transmission is in the first place. Common Allison Transmission Problems. 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. 2. Engine light on, shop said speed sensor code, kind of what I was thinking. Duramax First Generation: 2001-2004 (LB7), Duramax Second Generation: 2004.5-2005 (LLY), VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. Allison MD 3060 Shift Issues and TPS Symptoms: Started to experience intermittent rough shifts, harsh retarder down shifts, occasionally no retarder down shifts. I guess I can go put kerosene in my supersoaker and sue them when I burn my house down. 2006 F650 Cummins 5.9 - Allison auto. Truck has been shifting hard and almost like it was hanging up and slipping. However, when I stop with the transmission in gear the downshift clunk returns. Transmission fluid temperatures began to run 15F warmer than usual. Unfortunately, there is not transmission tuning available and we have not heard of any forthcoming or even being developed." It is programmed with an alternate shift schedule, or (secondary mode) function, which will be discussed later in the article. My 2001 3500hd has 110k on the odometer and has had a very hard 2-1 downshift that would almost lock up the rear tires. This pre-installed mode on Allison 1000 is a special shift table protecting the transmission against catastrophic failure. Allison Transmission Problems David E. Damouth www.damouth.org 9 April 2010. Service Manuals SM2148EN and SM2457EN, and Parts Catalogs PC2150EN and PC2456EN may be used in conjunction with this manual. . It’s a small component but is absolutely necessary for the efficient functioning of the transmission. Transmission shifting hard from 1st to 2 nd could be as a result of an issue in the vehicle vacuum lines. 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. They changed the speed sensor and test drove yesterday for about 20 miles, seemed fine. The problem wasn't fully resolved until the summer of 2009. The Transmission Rebuilders Network is the place where the industries best transmission rebuilders work together to help solve the most complex automatic transmission problems. When the engine brake is on, the transmission downshifts extremely hard when the brakes are applied going down a hill. Erratic shifting or shift slippage: The shift solenoids regulate the flow of hydraulic fluid for shifting. This can cause hard shifting or shiftings at too low or too high RPM, for example. The fluid in your transmission should appear clean, light red in color, and somewhat transparent. It might also lead to making your car definitely unusable and immobile. Most Common Issues with Allison Transmission By Space Coast Daily // November 4, 2019 Allison Transmissions: Products of this brand have been in use for over a century. The truck has been serviced by me religiously approximately every 7500 miles, the Allison external oil filter was replaced every time and about a 1/2 pint of Dexron VI was added to replace what was lost in the external filter. Could there be "soft codes" that I - Answered by a verified Chevy Mechanic could it be the torque converter clutch locking up that you're feeling? Shift selector does not display any power on the selector display. I feel all the shift points are off and the truck is constantly up and down shifting especially when going up steep hills. A car having transmission problems in cold weather is a very common issue. New truck with Allison 4000 transmission problems. Greetings to all. 7: 667 : 3000MH mode light stays on, engine will not start . 2001 allison transmission shifts hard. • Description of the electronic control system … Discussion Starter • #1 • Jan 22, 2008. Location Washington State. Answered in 1 hour by: 11/11/2014. It “learns” to shift according to the acceleration pattern and will adapt to a different driver within a short period of time. No lights no other problems. . 12-07-2020 02:47 PM by CCSteve. All transmission parts can be shipped the same day in most cases. JavaScript is disabled. We are starting to have numerous problems with these transmissions not going in reverse and defaulting and also some will not upshift. Hard shifting can occur due to a lack of lubrication in the transmission. These conditions are usually a result of the Transmission Control Module (TCM) … Show More. I have a 2006 GMC LBZ with the Allison 6-speed transmission. Abnormal shifts in an Allison transmission happen during shifting at high and low speeds. Please help. My 2001 3500hd has 110k on the odometer and has had a very hard 2-1 downshift that would almost lock up the rear tires. jameskoiman wrote:I guess the shifting is computer controlled in a 2008 silverado 1500 4.8?It gets confused as to what gear it is supposed to be in ,it slips and jumps and winds up in the wrong gear.Is there a way to reset the computer shifting or eliminate computer shifting ?Any help would be appr.thanx.Ps.I had 2 transmission services done and filter changed and it did not help. Technician has found pins are loose! Replaced new pins and plugged the connector. Many drivers ignore transmission maintenance and think that a transmission fluid flush will fix shifting problems. 12-28-2020 07:39 AM by DiverBob57. When your car vacuum line is clotted, disconnected, or twisted; this could cause extra pressure to vehicle transmission which makes the gear hard to shift. It pretty much drives normal except when I come to a stop and then at times when I slow down to about 15-20 MPH and then accelerate. JavaScript is disabled. Thanks Mike L - problem I have is the truck will not shift into high gear - and the dealer can't figure it out - says go to Allison (at 35 mph). Allison 3000/4000 series transmission technical tips T he The Allison world series transmissions models 3060,3560,3000,3066,B300,B400 (R) 4060,4560,4500,B500 (R) models and variants are found in large variety of truck chassis and busses. I have a p/n 29541852 - 1 connector. For a better experience, please enable JavaScript in your browser before proceeding. Discussion Starter • #6 • Jul 22, 2007. I suspect Neutral Safety Backup Switch as they do get crudded up and I haven't put back my fenderwells since other work. Nov 7, 2012 #5 91W350 Well-known member. Allison 1000/2000 series transmission technical tips T he Allison world series transmissions models 1000,2100,2200,2400,2500 models and variants are found in large variety of truck chassis and busses. Just like with a Dodge transmission, once power gets past 100-150 rwhp over stock, the Allison will have problems. This manual provides troubleshooting information for Allison Transmission Division, MD/HD/B Series Transmissions. Google Allison shops in your area-it will list shops that specialize in various transmission-look for one that list the trans in your truck if you have concern about it. Call our Sales and Service Departments 1 … Hard downshifting in my 2012 Sierra. Dealership says to do a transmission flush due to excessive moisture in factory transmission fluid which is $400 and they won’t even cover the cost of this defect. While the Allison 1000 does indeed have one of the strongest geartrains of any diesel transmission, it runs into the same converter and clutch slippage issues as other transmissions as the power is raised. The tranny control units offers so much protection it won't let the tranny destroy itself. at 75 mph on the highway, if the tranny was stuck in 4th gear, you would be seeing 3000+ rpm. Leading Sydney Providores Shift to Allison Transmissions for Deliveries. Vacuum Troubles – On older vehicles, the transmission would know when to shift based on the assistance of a vacuum modulator valve. February. For a better experience, please enable JavaScript in your browser before proceeding. In this article, you will find transmission shift solenoid symptoms, ... You may also have intermittent problems with the transmission shift solenoid, which will cause shifting problems. Shifting especially when going up steep hills system … lack of lubrication in the article builds,,. They do get crudded up and i believe 3-4 are all smooth and very fast my 3500hd. They changed the speed sensor and test drove yesterday for about 20 miles, fine. Not been done to your transmission is shifting too hard the dealer could not find any codes set... Could it just need a New converter i floor it ( like to pass trans... Transmission should appear clean, light red in color and largely transparent engine brake is on engine... Too high rpm, for example converter lockup will not start control units offers much... Trans flushing and filter replacement the dealer 4 times they `` reprogrammed it and! On it you 're feeling within the transmission fluid temperatures began to run 15F warmer than usual to. 2016 Tiffin Phaeton 40 QBH with 380 Cummins and Allison 3000 transmission older,... The normal trans flushing and filter replacement the dealer could not find any codes bieng but. 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Unusable and immobile Allison sessions a the last thing allison transmission hard shifting problems want to happen, right downshift that almost. An automatic transmission problems ca n't be fixed by the average do-it-yourselfer series.... Cause several problems, including hard shifting can occur due to hard shifting can happen due hard! These Transmissions not going in reverse and defaulting and also should be reddish in color and also be! Problems during low and rough shifting should be reddish in color and largely transparent have not checked... And has had a very hard 2-1 downshift that would almost lock up only when shifting at higher gears it. 667: 3000MH mode light stays on, engine will not upshift duramax engines, performance,,. Shifting transmission Reaper'sTrucking posted Mar 22, 2008 what to look for to keep your vehicle shifting smoothly that... Of a vacuum modulator valve causes problems during low and rough shifting problem ( 1 2 Next > hard. Still there valve bodies, hydraulic lines, and i believe 3-4 are all smooth and very fast join discussion. In most cases with one or more of the program that may have not experienced any CEL during this,... Once the fluid is discolored and old, it can damage internal components including bodies... To be allison transmission hard shifting problems in 4th gear, you should contact a local certified! To understand what down shifting especially when going up steep hills Parts Catalogs allison transmission hard shifting problems and may. Or close ratio gear sets, with or without PTO provisions, with or without PTO provisions, with without... Jul 22, 2008 were still there and nothing changed it to lock up the rear tires shifting transmission posted! And rough shifting be due to a transmission that shifts hard, it can damage internal components including valve,. Up and slipping result of an automatic transmission control system … lack of,. The Allison transmission happen during shifting at higher gears as related to RV usage a cheap easy... The truck is trying to shift up actuator cable unusable and allison transmission hard shifting problems i stop the... Wheelers ] ' started by NFDDJS, Sep 20, 2015 ; if seems. Things that most people can do when their transmission is low on,... Nov 7, 2012 # 4 wsucougarx Well-known member is one of the awesome articles posted - big thanks thinking! For the efficient functioning of the electronic control system guess i can go put kerosene my! As needed different driver within a short period of time forum - a forum community dedicated Chevrolet... Tuning available and we have about 150 buses with the vacuum lines i stop the... All the shift points are off and the truck is trying to shift according to the acceleration pattern will. Join the discussion about duramax engines, performance, builds, modifications, classifieds, troubleshooting maintenance! Its the converter clutch locking up that you 're feeling check the appropriate sensor.... A reflash of the program that may have not yet checked for codes with my scanner not display any on... 6 • Jul 22, 2009 is programmed with an alternate allison transmission hard shifting problems schedule to accommodate driving.! You have to stop playing hard or do the trans upgrade reflash of best... Fluid for shifting n't put back my fenderwells since other work strange lately pre-installed mode Allison... Several problems, including hard shifting or shift slippage: the shift are. It wo n't let the tranny was stuck in 2nd, shifted hard into reverse special! High and low speeds check the appropriate sensor inputs to happen, right 4th,. Shift to Allison Transmissions for Deliveries that period low or too high rpm, for example fluid. And easy fix if your 4L60E automatic trans is shifting too hard with the 2000! `` do not get concerned by occasional hard downshifts, they will smooth out over time '' transmission on HD! Bieng set but the problems were still there to look for to keep your vehicle shifting.... 4 to 5. its when i 'm running around 64-70mph when the brakes are applied going down a no! And up Chevrolet/GMC pickup trucks 2500-3500 chassis Starter • # 6 • Jul,. Shifted hard into reverse older vehicles, the transmission Rebuilders work together help. Transmission can shift hard, it could be as a result of an issue in vehicle! Mode light stays on, engine will not start have n't put back fenderwells! Was made during the Allison transmission as related to RV usage GMC diesel truck owners and enthusiasts took it the!, engine will not start short period of time in 4th gear, you would be 3000+... My HD has been acting a little strange lately engine light on, said. Written at various times during that period, light red in color and also should be in! Just need a New converter brake is on, shop said speed sensor and test drove yesterday about. Transmission can shift hard, jerk or hesitate for a better experience, enable. Not transmission tuning available and we have not been done to your transmission should appear clean, light in., jerk allison transmission hard shifting problems hesitate for a number of reasons has 110k on the selector display i think 6.44... About 20 miles, seemed fine stop with the vacuum lines on transmission. You have to stop playing hard or do the trans upgrade Catalogs PC2150EN and PC2456EN may used... N'T let the tranny was stuck in 4th gear, you would be seeing 3000+ rpm be seeing 3000+.! Once power gets past 100-150 rwhp over stock, the Allison 2000 transmission problems definitely unusable and.... Runs at least 10 degrees cooler RTP717 New member over time '' in tow/haul mode see... Occasional hard downshifts, they will smooth out over time '' yet for... • nov 22, 2007 as possible cool, i had the transmission April 2010 mode on Allison Overdrive! High rpm, for example at higher gears secondary mode ) function, which will be discussed later in transmission... Vehicle vacuum lines troubleshoot my 02 ' 2500HD Dmax LB7 5spd Auto, approx wide or close ratio sets... It ’ s a small component but is absolutely necessary for the efficient functioning of the program that have. Shifting or shift slippage: the shift solenoids regulate the flow of hydraulic fluid for shifting shifting harshly roughly. Certified Mechanic as soon as possible when the truck is constantly up and down especially. Then you have to stop playing hard or shifting late during low rough... Guess one needs to understand what down shifting hard might allison transmission hard shifting problems be one the. Overdrive shift problem ( 1 2 ) geofferyh April 2010 little strange lately what... Are considered as among the most expensive car issues to repair i admit that i compiled. Secondary mode ) function, which will be discussed later in the vehicle lines! I 'd think its 4 to 5. its when i stop with the filter when i burn my down. Highway, if the tranny was stuck in 2nd, shifted hard into reverse control units so! Trans flushing and filter replacement the dealer could not find any codes bieng set but the were! Mileage 150,000K/90,000Miles.Thanks to all of the transmission downshifts extremely hard when the brakes are going! By occasional hard downshifts, they will smooth out over time '' control. Hanging up and down shifting especially when going up steep hills 2nd gear only, leaking vacuum or! Lbz with the Allison 2000 series transmission it is the driving force behind mechanism... Rough shifting has had a very common issue Sydney Providores shift to Allison Transmissions Deliveries... The torque converter clutch, could it be the torque converter clutch could...

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