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Cylinder deactivation is very effective in reducing fuel and reducing the emissions of harmful gases. When we removed the oil pan from the new block, we noticed a metal shield covering the bottom of the block. Took it to the dealer and was told I had a collapsed lifter. I had purchased an extended warranty when I bought the truck new. I am confused about the plug in disabler. Thank you for your time. I had #4 lifter stick and now i am looking at replacing the engine with a non-dod version. There is no light on my dash or anything that indicates the system is active or exists, so its very confusing, Im still not sure if my vehicle has it or not. Plug the tuner into your GM vehicle's OBDII diagnostic port, and follow the instructions provided to update the engine control module's program The new program will make sure that AFM never engages. The lifter came apart and chewed up the lobe on the cam Im selling it I also told my friend at work when he asked me about my truck .I said Ill never by another GM ever. Look for the following: TheAFMcover is called the Lifter Oil Manifold Assembly (LOMA). Toyotas 5.7 is one of the biggest gas guzzlers among half-ton trucks. Yes thats true. The oil pump is high volume, but there are a lot of people that dont change it and rely on the pressure valve to keep the volume manageable. After taking a $3.6h bath on the lifter/valve work and doing a little research, how can GM allow a problem like this AFM continue from 07 to present? Hopefully he can free up the stuck/collapsed lifter. misfire or anything. When you drain the oil at three to four thousand miles its still clean. I was told that before I start the vehicle up I will need to have the AFM and VVT disabled in the ECU but that would require a custom tune from a tuner as the ECU cannot just be told that the AFM and the VVT is gone. I switched from gm to dodge in 1984, have had 3 1st gen Durango and 4 2nd gen Dakotas, all used, with impeccable reliability. A 14 gmc 5.3 Sierra 85000 miles I wear hearing aids, but I thought I heard more engine noises, but after checking the gas cap, the light went out for a week. Do not pay that amount. Keith, were happy to help. CHANGE YOUR OIL!!!!! The AFM activation and deactivation is controlled by the Valve Lifter Oil Manifold or VLOM. NOTE: Some parts are not legal for use in California or other states with similar laws/regulations. 2 15 with 5.3 Sierras both with 100k and But if you dont like it. Just one or two. i just bought a 2018 Silverado with the 5.3 RANGE TECNOLOGY.COM. I had one fail and it chattered the cam to the point that I had to Install a new cam. What if the pressure relief valve is stuck OPEN and the oil pressure never gets up to where it needs to be? bought at Brian Tooley Racing ! Afaik the 6.0 escalade hybrid does have it so wondering if safe to delete. Covers me to 100K. The result is improved combustion chamber pressure as the piston approaches top . Cylinder deactivation--branded Active Fuel Management by GM--shuts off some cylinders when extra power isn't needed, to improve fuel economy. .or something similar . Any thoughts or suggestions would be appreciated. If you swapped in a LS9 cam, you will find it makes good power at the very top, but its actually down from 5,000 rpm and lower where the truck spends the majority of its time. The 1st design (built prior to April 1, 2006) was had afm components but wasnt connected. In October of 2010, GM added a deflector (p/n NAL-12639759) to keep oil from being sprayed directly on the rear cylinders. With 40000 Friend will send to me from Arizona. changed oil , its all working now, but want to disable this sorry system. 2011 Chevy Avalanche LTZ. Any advice that you could offer would be great. Most of all, my concern is reliability. And consider using a higher grade of engine oil like Mobil 1 or Amsoil, etc. I have read synthetic isnt good for AFM lifters. Replacing engine due to issues caused by AFM. The detergent. so the trans fluid worked for you then? Number 7 cylinder lifters stops moving when truck starts. To do this, you need to leave the AFM solenoid pack connected to ensure no codes are thrown. If I put my truck in manual 5, it doesnt try to go into V4 mode. Dummy Me thought gm learned its lesson in 1981 but they never did and I Too am stuck with a Buick thats just waiting to self destruct. If someone didnt want to spend gas buy a Toyota. Next day, fired it up to take the the junk yard and it ran great. I traded in a 2004 4.8 L with 256000KM on it that ran like a clock and never gave me a problem. Perform a Cylinder Deactivation (Active Fuel Management) System Compression Test. Unfortunately because of emission standards nowadays, manufacturers cant go back to those style of engines. It also has an electrical connector on the back. From what Ive read new and low mileage engines with no issues is ideal to do a afm delete, tune, or use of a disabler. This happened on a camping trip with my kids last friday night. She drove it for another 35,000 and it went out again. It will show up as a misfire code in a cylinders 1,4,6, or 7. (Non-AFM engines have a smooth cover.). I got as high as 23mpg on the highway in my 89 K1500 with 350ci and a five speed manual. (Bought car 1 day before lifter died!) Have an intake and Borla exhaust. HELP, I have 2005 envoy that runs makes lifter noise then dies in about 30 seconds then I started it one day and it ran with little noise for 5 min started next day and it starts and dies again got heads off was told I could put ls 3 lifters in is that true or is there something else I could do thanks Duane. So now at 168 thousand miles it still runs good but gets bad gass mileage. You also need the disabler installed in your obd connector. [], I have a 2012 Silverado Z71 bought new. We need availability of a replacement engine without the AFM. It is also known as Displacement on Demand (DoD) or cylinder deactivation. At this state, a disabler would probably do what you need it to do. I phoned the dealer and gave the VIN number, told it isnt equipped with AFM. Oil 0w or 5w -20 Hello Brian, I just purchased a 2018 Silverado with a 5.3 AFM engine, I have 200 km on it. Thanks to a properly maintained 5.3 with AFM, I can routinely get over 20 MPG on the highway. This lowers the cost of building it [], [] aluminum block engine. Looking for another Toyota at this point to match my 1985 4 runner with 380.000 miles and no issues since new. I have been assuming this is just a slow to pump-up lifter or lifters. The dealer in Rockhill, SC when asked only said they had not had a problem. The L76 is an adapted version of the LS2, featuring new rectangle port cylinder heads and Active Fuel Management (AFM). Next day I drove my car to work and was fine but when I left work all lights came back on and terrible noise in the hood. Love the truck. The engine will operate on 8 cylinders in V8 mode during starting, idling, and medium or heavy throttle conditions. We had one for a company car in 82 and it never did run right from new but at least it didnt destroy itself. Didnt change exhaust nor tune so likely no change in power/torque. Loved the looks and interior and thought a I got a great deal at $6k even. I would say maybe 5% of my customers keep up on their oil changes. No it runs fine on sylinder one but not on 6 or 7!!! The engine will switch to operating on fewer cylinders when cruising at a constant speed. It looks as if Ill need to start saving for a complete AFM delete kit with a new cam. Any problems to watch out for?Did you replace the VLOM? Take a look at what bmw did in its R1250 bike. [] swaps come with an extra step or two thanks to the Generals fuel efficiency efforts (VVT and AFM). Yesterday my motor (116,000 miles) felt like it went into limp mode when decelerating from 8 cyl to 4 cyl but it recovered.This is the second time that this has happened in 6 months so I think that I am on the slope. He stated if I continued to exceed 4500 RPM it would blow the lifters out. While the system sounded good, the microprocessors scrambled to activate, deactivate, and then reactivate cylinders as driving conditions quickly changed, causing the car to hesitate, buck, and stall. The engine is close siblings with the LMG which shared many of the same featuresexcept the LMF isnt saddled with AFM. Now it appears GM and their handlers want to push the electric market with throw away junk that is mechanically weak . I may just do that Vic. Corvette that does employ AFM. Then again, it should have never been controlling those solenoids. Constant engine and transmission problems. The Oil pressure relief valve deflector added in Oct. of 2010 is small and its part number is NAL-12639759. My question on a 2007 Chevy Tahoe 5.3 AFM These trucks cost too much to have a terrible product. i have a 2007 suburban 6.0 and the number 4 intake lifter took a dive.i have already started to disassemble the engine as i plan on replacing all the lifters and reassemble the engine as i never had any other problems with it. In 5th gear on deceleration and 99 for fuel mileage estimate on the dash it still didnt go into 4 cyl mode. have yet to find a read that shows an escalade with high oil consumption and i have read a lot on the hybrid. The main misconception is that shutting down half the engine's cylinders reduces fuel consumption because the . General Motors Active Fuel Management Cylinder Deactivation Technology Active Fuel Management (AFM), otherwise known as Cylinder Deactivation is a General Motors engine technology that. No problems with any to this point. The system uses solenoids to deliver oil pressure to control. Not sure which direction to go from here. Cost about $250, but it is not fool proof. If you are using VVT, you could use the NAL-12612273 (L92) cam. Yes, always change all the lifters at once. Bought an 07 GMC Yukon 5.3 with the AFM, 87k. That might show up if you cut the filter and looked for debris in the pleats. We are looking into the AFM Disabler option, but my question is- how do we know if a lifter is already bad or not? I have also heard that the oil pump is to be changed and I have also heard that it does not matter. But after reading this thread, Im a little concerned about the long-term reliability. My Wifes 17 Buick with afm was my attempt to get back to gm. This should be added to your earlier model if you experience oil consumption. For a primer [], [] cathedral port cylinder heads and used Active Fuel Management (AFM). I am having that done today on my 08 Suburban and its only costing me $225. Glad I did. Is there any potential down-side to doing this in other words, might this do more harm than good? Definitely dont want to do anything to fix one problem and create another. Then changed the oil. He used seafoam and changed to synthetic oil. Weve written some articles on the various Vortec engine upgrade paths, such as this one on LQ4 and LQ9it discusses some of the better options for choosing a cam intended for use in a truck. Once the failure has occurred, the AFM shut off methods other than that probably wont work. I just bought a 2018 Silverado. Brian, I have the same question as Scott. I had an 82 caddy 4100 with alumn block and cast iron heads ,, Exploded in Philidelpha, Garbage.. I drive the same 320 mile trip every two weeks and drive the same route and full tank. Hello Mike, if you dont have any obvious signs like check engine lights etc., there are couple different possibilities. They are taller and have special oil holes. From what I am reading this would eliminate the possibility of failure, prevent false check engine lights and continue to make the appropriate power??? Regardless of the AFM solenoid being commanded on or off. While it does still use the GM Active Fuel Management cylinder deactivation technology that caused a plethora of issues on the gen-four Vortec 5300 engines, it seems that GM has solved the issues related to excessive oil consumption. Your 1981 caddy was your fmu I got glue inside of it and it stuck the potentiometer for stochiometric if you get a new fmu or you pick the glue out of the potentiometer you can set it to stoichiometric and get a lot better fuel mileage as far as your truck why dont you look at the intake manifold I got a crack or a vacuum leak somewhere for gas mileage thank you truck service, Near 1981 its your fmu it has glue inside the potentiometer you have to either RNR it for a new one or pick the glue out of the potentiometer for stochial magic is the only variable resistor inside that you can turn with a screwdriver once you get the glue out of it itll read still kill metric just be careful and then you can set it properly with your own meter on your monitoring your O2 sensor and then on your Silverado thingy your 5.3 just check the intake manifold for lakes Ill get you a better gas mileage if you dont have any intake cuz theyre plastic and they crack and stuff like that other than that yeah thats it, Larry Jenkins, I have a 17 GMC Sierra 6.2 SLT, I got 25 to 27mpg regularly with 93 gas and cylinder deactivation. Yeh truck has 5237 miles on it Hi Brian, Another option is to plug it entirely if the AFM is already removed. If possible, will simply not using VVT provide a powerful,good running engine? You mentioned that it will shoot oil into the pan and on the cylinder walls possibly causing some oil consumption So i have a running vehicle and my only concern is making it as reliable as possible, should I disable the AFM or not?? Now I learn about the cylinder deactivation issue and suggestions to add the Range Technology module to deactivate it. I have a 2011 GMC Sierra 1500 with the 5.3. I have a 2011 GMC with over 162,000 miles on it and it runs great! Thanks for your help. Keeping the oil changes regular is important and its possible that a previous owner may not have been as diligent as you are. $8500.00 fix. Dont drive it if you have a dead cylinder due to afm failure. However I do have 7 year bumper to bumper warranty that covers this problem if I start to get lifter problems over the next 2 years.. On the other hand if get the AFM disabler installed I am pretty sure that I void the warranty from what I read on the policy. This basically deactivates the cylinder deactivation system. One month to the day driving on the highway got the Service Stabiltrak message quickly followed by the misfire code. Im praying that my RangeTech buys me a few years. Would never take it on a long trip. The 2nd went with a conventional valvetrain. The cylinders are deactivated by means of a double-stroke lifter which is FAR more prone to failure than a standard lifter. Im servicing a 2011 Chevrolet 5.3 with AFM. Oil consumption problems can be caused by a number of factors, including low oil pressure, worn oil seals, or worn engine parts. [], [] way. Easier said than done. [] Here is a guide on how to turn off AFM: https://www.onallcylinders.com/2017/11/30/how-to-delete-or-disable-active-fuel-management-afm-on-gm-… [], [] Guide to disabling AFM: https://www.onallcylinders.com/2017/11/30/how-to-delete-or-disable-active-fuel-management-afm-on-gm-… [], [] Here is an article on how to deactivate AFM. I speak from some experience. This system is the most effective way to disable AFM. Ive got about 6 to 8 psi of oil pressure after the engine gets warm and I have to stop at a traffic light. More information can be found in the GM TSB bulletin number 10-06-01-008g. I will be installing the AFM deactivator tonight when I get hoe. In 2010, GM added a deflector (p/n) NAL-12639759 to redirect in into the pan. Gary, [] 3 engines didnt have AFM (Active Fuel Management) or VVT (Variable Valve Timing), so you dont have the expense of an AFM or VVT delete []. Toyota has their own problems. Very expensive repair too! After all we bailed them out of bankruptcy. I am not in a position to have a new cam and lifters installed but Im also not in a position to not having a running truck! Hi Brian please help, yesterday after ice fishing was climbing a hill back home and check engine light flashed. I had privilege to work on some of that garbage they never did work . Didnt really notice a loss in power other than the surging, (wondering if thats the engine trying to switch between 4 and 8 cylinders). Although the last oil change I had they offered a more expensive oil that would let me go every 5,000 miles and when this happened I was almost at 4,000 so needless to say I will never do that again. It seems this tough engine has everything incorporated into it. thanks brian love the info Im thinking of buying a ford now, I am going to buy a new truck in about a month it would be a Chevy but Dodge has lifter problems so they are out and Chevy has DoD problem.If they come out with Silverado without the DoD then i would buy one.But they arent so i will become a Ford man from now on, Have fun with that Ecobust motor & stretched timing chain . I have 1999 5.3 Silverado that gets 19-20 miles to the gallon all the time this shit pile with dod only gets 14 miles to the gallon. I have a 12 wit 4.8 Silverado 75000 miles Absolutely agree, but we all know GM cant afford to recall them all & definitely wont, gettin a Toyota, but first will go to GM dealer and ask to see a truck without AFM & when they say they dont have it Ill say See ya, I have an appointment with the Toyota dealer! Always had GMs never anything else till now. Brian, It was in the late 70s or early 80s and it was a POS, Your memory serves you pretty well I too have the same nightmares lol. Oh,the throw away vehicle has 77,000 miles and has always had meticulous maintenance . Have not had a problem yet. Replaced all lifters. Having a hard time finding one .. GM tried this on cadillacs about 20 years ago and if memory serves me correctly it was a disaster. The exhaust valve remains open during the intake stroke and closes just before BDC. My dad ended up running seafoam through it and some transmission fluid, changed the oil pressure sensor which I definitely think was bad and also cleaned out the little screen and he said it was so full of junk and metal scraps. The oil is baked on to every component. They have plastic casing, so you can imagine what will happen with aged plastic. 50,000 miles. Never did strand me on the side of the road way. But it also restricts passages that the oil runs through. According to some experts, switching to cylinder deactivation reduces the emissions high somewhere between 4 and 10%, which is a huge percentage of saving the air from pollution. When cruising on the freeway (for example) in 4 cylinder mode and jumping on the throttle to pass or get out in the fast lane, there is CONSIDERABLE and annoying and dangerous lag, like 3 seconds, and this is a problem. If you ignore it and keep driving, odds are you will destroy the cam as well. Only running on drivers side cylinders. Its job is to direct the flow of pressurized engine oil to the active fuel management intake and exhaust valve . So I researched and got an AFM disabler. Ketil, let us know what you find out. https://www.cargurus.com/Cars/Discussion-t30884_ds822284. How about if they just let us have a manual transmission agains for fuel mileage? Just one. Batten, followed by several years developing performance pistons at Wiseco Piston Co. Today, Brian develops performance parts for Summit Racing Equipment and is a regular OnAllCylinders contributor. How stupid do you have to be to whine like a welfare check cashing idiot when there are literally 3 or 4 different ways to totally disable AFM. Vehicle has 40k miles been maintained well and shows no signs of lifter concerns at present. If so what would the vin code be? I have already dropped a lot of money on this truck (08 suburban). It came back on last Wednesday starting with a flash. Would doing the disabler option once I get it back be the right one? The oil-pressure controlled system that operates the special lifters is VERY prone to failure, if the oil is not changed on time, OR if the wrong oil is used. I want to put a AFM disabler in it what all do I need to have done. The Definitive Guide to LS Engine Specs and LS Engine Upgrades, LS3 Engine Upgrade Guide: Expert Advice for LS3 Mods to Maximize Performance - OnAllCylinders, LS Engine Bore & Stroke Chart - OnAllCylinders, http://www.autoserviceprofessional.com/article/91652/ticking-gm-v8-lifters-and-dtc, Range Active Fuel Management Disable Device, LS9 6.2L Engine Upgrade Guide: Expert Advice for LS9 Mods to Maximize Performance - OnAllCylinders, LMG 5.3L Engine Upgrade Guide: Expert Advice for LMG Mods to Maximize Performance - OnAllCylinders, L59 5.3L Engine Upgrade Guide: Expert Advice for L59 Mods to Maximize Performance - OnAllCylinders, L76 Car Engine Upgrade Guide: Expert Advice for L76 Car Engine Mods to Maximize Performance - OnAllCylinders, LH8 5.3L Engine Upgrade Guide: Expert Advice for L20 Engine Mods to Maximize Performance - OnAllCylinders, LH6 5.3L Engine Upgrade Guide: Expert Advice for LH6 Engine Mods to Maximize Performance - OnAllCylinders, LFA 6.0L Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More - OnAllCylinders, LFA 6.0L Engine Upgrade Guide: Expert Advice for LFA Engine Mods to Maximize Performance - OnAllCylinders, LZ1 6.0L Engine Upgrade Guide: Expert Advice for LZ1 Engine Mods to Maximize Performance - OnAllCylinders, What the New LT2 Mid-Engine Corvette Reveals About the Future of GM LT Engines, All the Torques: How Summit Pro LS Truck Camshafts Help Truck Owners Maximize Performance, LMF 5.3L Engine Upgrade Guide: Expert Advice for LMF Mods to Maximize Performance - OnAllCylinders, L98 6.0L Engine Upgrade Guide: Expert Advice for L98 Mods to Maximize Performance, LQ4/LQ9 Engine Upgrade Guide: Expert Advice for LQ4 & LQ9 Mods to Maximize Performance - OnAllCylinders, Range AFM Disabler Reviews | Range Technology AFM Disabler 2019, LS3 Engine Upgrade Guide: Expert Advice for LS3 Mods to Maximize Performance, LM7 5.3L Engine Upgrade Guide: Expert Advice for LM7 Mods to Maximize Performance, LS4 Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More, L76 6.0L Car Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More, L96 6.0L Engine Upgrade Guide: Expert Advice for L96 Mods to Maximize Performance, LC9 5.3L Engine Upgrade Guide: Expert Advice for LC9 Mods to Maximize Performance, LH6 5.3L Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More, LZ1 6.0L Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More, Chevy 4.3L Vortec Common Engine Problems - Vortec 4300 V6, https://www.onallcylinders.com/2017/11/30/how-to-delete-or-disable-active-fuel-management-afm-on-gm-…, The 5 Most Common Chevy EcoTec3 5.3L Engine Problems, Chevy 6.0L Vortec Engine Problems - Common Vortec 6000 Problems, The 4 Most Common Chevy EcoTec3 6.2L Engine Problems, Gen 3 vs. Gen 4 LS Engines: How to ID Them (Video), Ask Away with Jeff Smith: Upgrades to GM LS 6.0L 4x4, LM4 5.3L Engine Upgrade Guide: Expert Advice for LM4 Mods to Maximize Performance, L33 5.3L Engine Upgrade Guide: Expert Advice for L33 Mods to Maximize Performance, Mailbag: Choosing an Engine Management System for an LS-Swapped '82 Olds Cutlass. Only thing I noticed with the oil consumption issue. He claims that GM used the same engine whether it was or was not equipped with AFM in this year and model? Took it to my dads and he tore things apart and found that I had a lifter that was stuck. Hi Mike, the metal shield you noticed is probably the windage tray. Service manager said nothing else needs to be replaced because the engine has a Teflon coating. I could just transfer over the AFM lifter cover, but it is really nasty on the bottom side & I do not want to risk damaging this replacement engine if it is loaded with debris from the lifter & camshaft failure. If you just crack it without it starting it moves all the time . They lasted one year with big problems. Because its not just GM that have engine problems. 1981 Cadillac V 864. There is a filter screen under the oil pressure sender that may be clogged and not getting enough oil to supply the solenoids. The most common are fuel pump failure, transfer case sensor failure, fuel injector failure, and carbon build-up. There are two ways to disable or delete Active Fuel Management on your GM or Chevy Gen IV LS or LS-based Vortec engineone is to install an AFM Disabler, and the second is to install an AFM Delete Kit. I saw two Summit Racing kits, with different valley coverswhich one do I need for my Yukon? You can reuse the original valley cover OR use a non-AFM valley cover, leave the harness connected, and tuck the solenoid pack away. Also, it is the easiest way [], [] for the 2010 Chevy Camaro SSis also a Gen IV 6.2L aluminum-block V8, but with the addition of Active Fuel Management and Variable Valve Timing. I will keep reading and take notes. There are 5.3 cylinder deactivation problems that can occur. Todays computers are faster so it does work. Just shut AFM off. I have successfully used a gadget that plugs into the ODBII. As GM issued 13 updatesnone of which workeddealers disabled the system on their customers' cars, leaving them permanently in V-8 mode. Is there any reaction to the disabler when pulling a boat or trailer? it is the regulator guy! Just like Ram and their trash MDS system or Ford and their throwaway Ecobust engines. Then I guess I have to spend a bunch of money and get the delete kit. . The collapsed lifters will not engage the pushrods and both valves remain closed. Happened to me twice 2009 Silverado, finally deleted DOD and installed a performance cam and lifters. In the mean-time I found that you can keep the engine from going into 4 cyl mode by using the manual shift (if so equipped) and keeping it out of 6th gear. Lost number four I still get a P0336 code every once in a while but still good to drive around town. But then she passed away from cancer. Your email address will not be published. Or not because it is the cast iron block and not he aluminum block? I service plenty of these vehicles with AFM, and the ones I have to open up the engine for repair because of a failure doesnt surprise me anymore. Will this AFM DISABLER damage anything???. Chevy 5.3 Engine Problems (Gen 4) #3: Spark Plug Failure. Really could use some pointers. We figured we already had the intake manifold off to install the engine, why run the risk of MIL only to have to removed the intake manifold again without being paid. Have a lifter problem on my 2010 5.3 Silverado. In 2015, I purchased a new Tahoe with the AFM and two weeks ago with 71K miles on it, the engine light came on. module (ECM) will command the cylinder deactivation system ON to deactivate engine cylinders1, 7, 6, and 4, switching to a V4mode. Been driving with no issues but I did notice that the AFM disabler removed a P0449 code (Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction) dont know if this is a coincidence or they are related??? Fuel pump failure is the most common problem and can occur due to a number of reasons, such as a clogged filter or a faulty pump. You can monitor the oil level on your dipstick for 3,000 miles to determine if the deflector or plug would be needed, but chances are you wont based on the TSB. If you want to delete it entirely, its a M14 x 1.5 pipe plug or you could use the Improved Racing plug p/n IRP-814-M14-Kit. This is my project car and will be my drive (about 5000 miles a year). There is a chance the cam lobe was stressed and started to deteriorate. The VLOM consists of 4 electronically operated solenoids and is bolted to the top of the engine block beneath the intake manifold assembly. Regarding the cylinder deactivation impact on fuel consumption . how many miles do you have on your engine? At least Dodge admitted they had junk transmissions in the early 2000s and picked up sales each. I am worrking on a 2007 chev Silverado 6.0 engine, [] the L76 that was equipped with AFM and had a ribbed valley cover, the L98 cover was [].