chevy avalanche transmission upgrade

Updated TransGo Zinc Coated Separator Plate. 1999-2002 GMC K3500HD 6.5L 4X4 Why You Should Add a GM Transmission Temperature Gauge to a Chevrolet 4l60e to 4l80e swap kit. In this case were talking about a broken drive shell which will need to be replaced. Before any upgrades, addons, and/or core charges. Told my avalanche group all about it. 4L60E Transmission for 2001 & Up GM LS Engines 4WD Truck. 2001-2006 Chevrolet Suburban 2500 8.1L 4X4 The Hydra-Matic 6L80 (production code MYC) is a six-speed automatic transmission produced by General Motors for use in rear- and rear-biased all-wheel-drive vehicles with a longitudinal powertrain orientation. 2011(September)-2012 Holden VE Commodore Series 2(MY 2012) Chevy Avalanche 2500 2004, High Performance Automatic Transmission Rebuild Kit by Transtar Industries. '99 issue in a story titled "Hard Hittin' Shiftin'" on page 66. Top 5 Problems Chevy Avalanche Truck 2nd Generation 2007-13 5 PINION FRONT PLANETARY & 5 PINION REAR PLANETARY (4L85E), SRT STAGE IV 4L85E Avalanche 5.3 V8 Flex Fuel. Came packaged good and Performs better!! Accessories, TCI 371416 - GM Maximizer 4x4 Transmission, TCI 371430 - GM Maximizer 4x4 Transmission, Please click here to download the instructions PDF file, BMR Suspension TCC024H - Transmission Conversion Crossmember 1984-92 Chevy Camaro & Pontiac Firebird, BMR Suspension TCC030H - Modular Transmission Conversion Kit 1967-69 Chevy Camaro & Pontiac Firebird, FAST 30282-KIT - EZ-TCU Transmission Controller GM Overdrive Up-To 2009, Hooker Headers 12625 - Blackheart LS Engine Swap Transmission Crossmember, Chevrolet Performance 19302405 - SuperMatic Transmission Controller Systems for 4L60-E with LS Engines, TCI 302820 - EZ-TCU Control Unit 2009-Down GM 4L60E, 4L65E, 4L80E, 4L85E Transmissions, JEGS 60129 - Flywheel and Flexplate Turning Tool, JEGS 81432 - Transmission Teardown Work Station [1/2-Ton Capacity], JEGS 28071 - Quick Shift Automatic Transmission Fluid [1-gallon], Lisle Tools 23400 - Transmission And Transaxle Plug Set, JEGS 60308 - Transmission and Transaxle Stepped Plug Set, JEGS 22010 - Transmission Guide Dowels 3" Long with Tapered Shape & Slotted Head, JEGS 72312 - Brake and Parts Cleaner [14 oz. The tailshaft housing to look for if you're replacing an original TH400 trans came stock on mid-'80s police cars (Caprice) and the early Impala SS. Estimated . Updated AC Delco pump cover (stator support), body (bell housing), and vanes with hardened rings, Upgraded line boost valve and slide spring, Performance-tuned solenoid valve body with new ACDelco transmission control module. 2010 Chevrolet Avalanche Problems and Complaints - 7 Issues - RepairPal.com 1999-2000 Chevrolet K3500 6.5L 4X4 Chevrolet Avalanche Parts & Accessories - 4 Wheel Parts Each transmission kit is engineered with factory-matched torque capacity ratings, helping ensure the . Buy 4L60E Transmission Rebuild Kit Heavy Duty Master Kit with 3-4 Power-pack at Amazon. 2008-2009 Hummer H2 Many times, people will tune out the DOD and reduce the converter lockup in certain gears while improving pressures to prevent the TCC from wearing out. Thank you guys for supplying awesome quality performance parts. UltraPower 8.1L ECM Benefits: Fuel mileage improvement of up to 1 MPG. Sonnax is an industry leader in the cutting edge design, manufacture and distribution of the highest quality products to the automotive aftermarket, commercial vehicle industries, and industrial sectors utilizing drivetrain technology. October 2008. 4L60-E. Find 2007 CHEVROLET AVALANCHE Parts and Accessories and get Free Shipping on Orders Over $99 at Summit Racing! This is due to the constant shutter that the converter sees when DOD is constantly cycling on and off. 2004 Chevy Avalanche. This cookie is set by GDPR Cookie Consent plugin. Chevy Avalanche Instrument Cluster Repair | Auto Tech Rescue The most common simple DIY 6l80e upgrades that can be done with simple hand tools in your driveway without removing the transmission to tear apart are . Below we've outlined the most common ones. 1999 GMC Suburban K2500 6.5L 4X4 All of our transmissions are fully remanufactured and are held to the highest and strictest industry standards. 2011-2017 Chevrolet Caprice PPV . 2005 Chevy Avalanche. IF a 6l80 is ever taken apart for a rebuild, its generally best practice to consider replacing the drum with a stronger aftermarket unit. Sonnax HD Forward Clutch Hub Best & Worst Years for the Chevrolet Avalanche - VehicleHistory m) of torque. It takes ab. . We can't answer your question directly, but we may address it in a future story, so stayed tuned. Transmission randomly pops out of Park with no one in the vehicle. All Rights Reserved. 2004 Chevy Avalanche Performance Transmission Rebuild Kits This 4L60 transmission includes the bolt-on bell-housing to fit GM LS-Series engines (Pre-LS engines should use transmissions 555-603010 or 555-603015). x 60 in. 2007 Chevrolet Avalanche 1500 automatic Transmission Change Vehicle. Yes, in theory, but it's not recommended. Call (or text) 9166472556 / 9168894299 for quick answers to your questions about this Chevrolet Avalanche LS 1500 4dr Crew Cab 4WD SB. The 4L60 is the latter model 700R4 transmission, only the name changed, if you think you may have a 700R4 look here to identify it. Parts List: The shell is a part of the inner workings of the transmission, that holds the clutch pack and steels. Problem - A common transmission problem occurs when the transmission shudders/shakes between 40 and 50 mph, as the torque convertor clutch engages. As an Amazon Associate we earn from qualifying purchases. General discussions on the 2007-2013 2nd generation Chevy Avalanche on the GMT 900 platform. Some cars that used the 4L80E transmission include Chevrolet/GMC pickups, commercial vehicles, and vans. life you can get out of a truck. The Avalanche appeared on the Scene for the 2002 model year - there were no 2001's. The very first Avalanches suffered from a transmission problem called a Shell. Texas Speed & Performance DOD / AFM Delete Kit for 5.3/6.0/6.2 Engines Original oil. A Completely Remanufactured and Improved Torque Converter is tested for leaks lock-up concentricity and balance. TransTec Overhaul Kit Rubber Seals, Metal Clad Seals, Sealing Rings, Paper Gaskets The Transgo 4L60E-HD2 is meant for crisp muscle car or full race shift performance. 2001-2006 Chevrolet Silverado 3500 6.0L 4X4 The 4L60-E can carry a Gross Vehicle Weight of 6,000 pounds, whereas the 4L80-E can carry a GVW of 8,000 pounds. Necessary cookies are absolutely essential for the website to function properly. The Jegs 555-603025 transmission will fit an '01 Sierra 4x4 with V8 engine. Condition : Excellent. The perfect upgrade for more holding power without excessively harsh shifts. Top 10 Chevy Avalanche Mods & Upgrades - Best Custom Parts for Chevy ACT manufacturers a special High Pressure Valve (PN 17008) that allows the trans to see maximum oil pressure with a non-lockup-style converter, and they don't recommend combining it with a lockup converter. Below is a detailed video of performing a transmission fluid change on a 6l80e in a Chevy Silverado. Threads 1K Messages 34.1K. 2006 Chevy Avalanche Transmission Parts - CARiD.com Chevrolet Avalanche 1500 Automatic Transmission OEM 126K Miles (LKQ Borg Warner Carbon Lined Reverse Band The Jegs 555-603025 transmission will only work in a '00 Silverado if it has a 13-pin connector. 485 North Hobbie AvenuePost Office Box 1782Kankakee, Illinois 60901, My AccountShopCore ReturnsAboutRefunds & ShippingPrivacy PolicyTerms of Use. The 3-4 clutch upgrade was added in after the fact and the included steels . While it's true all you need is a laptop and an OBD-II connector cable, you will need to acquire the update and use special expensive software. Chevy Avalanche Transmission Problems & Cost | 4L60E | 4L80E |6L80 Among the Chevy Avalanche years to avoid is the Chevy Avalanche from 2002 through 2008, then from 2009 to 2010. Buy your 4L60E 4x4 performance transmission online. Below weve created an overview of the TFs that are recommended for each transmission: Hi! misha1957 Member Posts: 6. The 6l80 was designed to handle the torque output of some of GMs biggest late-model LS (gen 4) and LT (gen 5) v8 engines, but a number of design flaws created most of the common 6L80E transmission problems. 2003 Chevrolet Avalanche 1500 Instrument Cluster If you happen to have a Silverado 1500 with a bad transmission, then you can expect the following symptoms: The 4L80-E is not a transmission with many problems. Check out these handy build guides to get maximum results out of your rebuild! 1999-2004 GMC Sierra 2500 6.0L 4X4 Several companies are now offering parts to help make swapping in a T56 a whole lot easier. Suppose you want to make sure that the transmission of your Avalanche lasts as long as it can last, then youll need to take care of it. By far the most common overdrive swap has been replacing a three-speed automatic trans with the popular 4L60/TH700-R4 unit. The 6L80 is also considered to be sturdier than the 4L80-E. Also read: What Transmission Is In A Chevy Trailblazer? A loud rattling sound when transmission engages reverse. Buy a new or remanufactured engine, transmission, or transfer case and we'll ship it directly to your front door.for FREE! Gains of 50-60 Horsepower and Torque Gains of 70-80 lb-ft. Maintains speed and higher gears when climbing hills. 1999-2000 GMC K2500 5.7L 4X4 Built for performance: the McLeod by Raybestos Powertrain 4L60E performance transmission rebuild kit utilizes Stage-1 red friction clutch plate material to deliver the competitive power and performance you need on the street, on the track and off-road. 4 Koleene Intermediate Steels, SRT STAGE II 4L80E Furthermore, if you fail to update properly, the vehicle will literally not start. Description of this Chevrolet Avalanche 4WD Crew Cab LS. However, there are some elements you should look out for. The 6l80e requires recommended maintenance of changing the fluid, and filter every 30,000 50,000 miles depending on usage. Wash hands after handling. Our high-performance transmissions including GM 6L80 (level 1 and 2) and GL90 are built to the horsepower, torque, and rear gear ratio specs of the engine that it will be matched to. You are now signed up to receive great E-Mail Offers! The 2007 2013 Avalanche also has a 4L60-E automatic and a newly developed 6-speed 6L80 automatic transmission. VIN : 3GNVKEE02AG286623. Click HERE for a list of rules and exclusions. CALL 800-708-0087, Office Hours are Monday-Friday, 9:00am-6:00pm EST. For either swap, the driveshaft will have to be shortened by as much as 3 inches. 1999 Chevrolet Suburban K2500 6.5L 4X4 L99 can use standard L92 valley cover if you reuse the factory L99 PCV system. If you happen to have a . 2007-2015 Cadillac Escalade Engineered to Dominate, the 4L65E 4WD Mega Monster transmission is tough enough to withstand the rigors of even the toughest heavy duty trucks, used for towing/hauling or off-roading. Aerosol Can], JEGS W4034 - Funnel [18 in. The Inside Scoop On Why GM Discontinued The Chevy Avalanche What Are the Different Types of Transmission Fluids? The 4L60 preceded the electronically controlled 4L60-E, which currently comes stock in most of GM's V-8-powered cars and -ton pickups. 4L60E Monster-In-A-Box Transmission Rebuild Kits To combat transmission temp issues, installing an aftermarket transmission cooler is certainly helpful along with a deeper, higher capacity transmission pan if you have the space to do so, and thermostat bypass. Chevrolet. Starting in the 2006 model year, General Motors released the6L80E and 6L90Etransmissionsthat developed several issues that tend to frustrate transmission as well as body shop technicians servicing them globally. For 2003-2006 and early style 2007 Chevy/GMC clusters, we recommend a full rebuild on our . Chevrolet Transmission Swap Guide - Chevy High Performance - MotorTrend The filters we recommend for your 6l80e are: As an FYI, the 6l80 transmission pan gaskets are a much higher quality material than older style gaskets, which as usually a thin rubber or cork gasket. I know the engine. 2023 JEGS High Performance. Other common 6L80E transmission problems include: Early versions of the 6l80 had issues with developing cracks in the 1-2-3-4 piston, and sometimes within the piston itself. I rebuilt the 4L60 transmission in my '59 Chevy Truck for the first time, on my own, three years ago using every Sonnax component available for my application. Lower rpm than factory. vehicle weights. The transmission control module (TCM) is updated and recalibrated to the latest OEM calibration. The Jegs 555-603025 transmission will fit a '99 Silverado. 2002-2006 Chevrolet Avalanche 6.6L 4X4 So when the throttle is either wide open or completely closed, the converter clutch is unlocked, allowing converter slippage. What most people wouldn't think of is a Chevy Avalanche, but you should probably start. Free shipping for many products! Stock ID : 286623. What this means to you is the fact you are getting a quality product that meets or exceeds the OEM . Chevrolet Avalanche Transmission Problems - Car Forums Chevrolet Avalanche - Wikipedia Another common problem seen on most wheel drive cars and four-wheel-drive trucks is that moisture gets trapped on the spline and destroys both the trans output shaft as well as the transfer case 4-wheel drive unit splines. Give your Avalanche the forceful and quiet sto pping power it needs with our durable brakes, r otors and brake pads. Purchase the 4L60E transmission from JEGS High Performance today! If you are looking for aftermarket pans that allow for more fluid capacity, there are plenty of options. 2007-2009 Cadillac STS-V, STS The 6L80 denotes that the transmission is a 6-Speed, Longitudinally mounted, and for 8000 lbs. JEGS 4L60E Transmission for 2001 & Up GM LS Engines 4WD Truck Most 6l80e transmission filters and kits which include a new pan gasket, filter, and filter seal cost around $20 $30. Edmunds has 927 Used Chevrolet Avalanches for sale near you, including a 2006 Avalanche 1500 LS Pickup and a 2012 Avalanche LTZ Pickup ranging in price from $5,995 to $29,990. This transmission comes with a 1 Year 36,000 Mile Warranty with the purchase of a new torque converter. Includes a datalogger that you plug into the OBD2 for us to analyze and optimize . Its overall dimensions are very close to either of those gearboxes, so the Richmond four-speed can be swapped into any car in which a '71-and-later Muncie or Super T-10 was optional. There are other aftermarket manual trans options available for the early Chevy crowd that won't cost more than the down payment on a new car and are much easier to complete. The only modifications needed to install a Richmond five-speed in a pre-'71-Muncie- or T-10-equipped car would be moving the crossmember back approximately 2 inches. Find The Best Prices On 6l80 Transmission Pans. The Jegs 555-603025 transmission does not fit an '04 Colorado.. These cookies ensure basic functionalities and security features of the website, anonymously. The next easy swap involves replacing either a PG or TH350 with the bigger, stronger, and heavier TH400. The last problem is caused by failing O-rings which need to be replaced. Transmission not engaging after changing the transmission fluid and filter. Call Now (888) 242-2605! 6L80 Transmission $2,795 | 5-Year Warranty | Money Back Guarantee. It puts the driver in command as it will holds 1st, 2nd, 3rd to any speed. 4L80E Power Tow Shift Correction Kit WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. Perhaps that's due to their weight and high initial cost. Borg Warner or Raybestos Front Band According to repairpal.com, Chevy Avalanches end up at the garage for an unexpected visit about 0.46 times per year. I'm Stefan, the owner and lead writer at TheDriverAdviser.com!Whether youre planning on buying a new car or you want to know the detailed specs of your current one we got you covered! Chevy Avalanche 4L60-E Transmission 2007, Hi-Tek Transmission Oil Pan by B&M. 1999-2000 Chevrolet K3500 5.7L 4X4 Huge Engine Upgrade . W, JEGS 80603 - Razor Scraper with Safety Cap, OEMTOOLS 24661 - 20V 3/8" Drive Li-Ion Cordless Impact Wrench, JEGS 28069 - Heavy-Duty Friction Modifier [16 oz. Due to issues with the original manufacturing process, cracks and other damage can cause a catastrophic failure of the 4-5-6 clutch pump and intermediate shaft. When checking your transmission fluid, be sure to not only look at the fluid level, but the color and smell. This 2011 . Most aftermarket deep 6l80 pans are made from a heavy duty cast aluminum, and typically provide an extra 2 quarts of fluid capacity or retain the factory fluid levels but provide added strength. As a general rule of thumb, Chevrolet advises you to change the transmission fluid of your Avalanche every 45,000 miles. Msg & data rates may apply. The 2005 Chevrolet Avalanche has 13 problems reported for transmission failure. 2003 Chevy Avalanche. We ensure that all the current updates are performed, during reassembly each unit is ran through tests to ensure correct assembly and quality. Some 6l80 builders may weld the cracks, but that isnt a permanent solution. Well dive into specific transmission problems shortly, but they dont seem to be the thing that would trouble the Avalanche. Our Process: All of our transmissions are fully remanufactured and are held to the highest and strictest industry standards. Silverado & Sierra Transmission Cooler Upgrades - Transmission Cooler Guide We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. 2006 Holden VE Commodore/2008 Pontiac G8 When changing from a PG/TH350 to a TH400, the stock trans crossmember will need to be moved back several inches to align with the TH400 trans mount. Burnout after burnout . The purpose of the lockup is to couple the engine directly to the transmission's output shaft in Fourth gear for the best fuel economy. Transmission for 2007 Chevrolet Avalanche 1500 5.3L 4x4 The 4L60E 4x4 transmission fits 2001-Up GM LS-Series engines. The TH700 uses a unique torque converter that will bolt right up to a TH350's flexplate. Chevy Avalanche's and their transmissions normally have few problems. Amazon.com: 2002 Avalanche Headlights This cookie is set by GDPR Cookie Consent plugin. Another benefit of these overdrive transmissions was that they featured a much deeper First-gear ratio, giving improved acceleration off the line. Chevy Avalanches are known to be fairly reliable trucks, although they do certainly have their defects. When people hear used Chevy trucks, they probably think of a Silverado from the 90s that's been weathered and worn-down from years of hard work.The scuffs and scratches in the bed and on the tailgate a testament to the trucks fortitude. Below weve outlined the specific transmissions that are used in the production span of the Avalanche, and weve attached prices that we found with online retailers: Also read: Chevy 1500 Transmissions & Chevy 2500/3500 Transmissions. It does not store any personal data. Warranty: Designed specifically for each vehicle, these parts feature seamless integration and are rigorously tested . These cookies will be stored in your browser only with your consent. But by 2011, the year prior to GM's decision to discontinue the vehicle, Chevy Avalanche sales dwindled to a measly 20,088 . 1999-2000 GMC K2500 6.5L 4X4 Problems / Chevrolet / Avalanche / 2010; 2010 Chevrolet Avalanche Problems. Moisture gets trapped on the spline which destroys the trans output shaft and transfer case 4-wheel drive unit splines. On this blog, weve already done extensive research on several Chevrolets and their transmissions. Its wiring harness has a built-in diagnostic port that will allow the connection of the modern scanning electronics present in any Chevrolet dealership's garage to track down and diagnose any transmission-related problems. Rental cars, loss of work, any labor costs, removal/reinstall fees, towing costs, inspection fees and any other incidental costs or damages which may be associated with product failure. Read on! Find many great new & used options and get the best deals for For Chevy Avalanche 1500/2500 2002-2006 Automatic Transmission Oil Cooler Black at the best online prices at eBay! 2008-2013 Chevrolet Avalanche, Weight: 195 pounds (Dry), 230 pounds (Filled). This Chevy Avalanche Will Amaze You With It's 6.2 Liter - HotCars 6 Direct Clutches and 6 Koleene Steels (1 Additional Direct Clutch using forward steels) Standard Delivery. A familiar 5.3-liter V8 will be a standard engine and produce 360 horsepower and 390 pound-feet of torque. 1999 Chevrolet Suburban K2500 5.7L 4X4 See one of our TSP Camshaft Packages. Sonnax high performance products meet the toughest challenges faced by hard-working, daily-use drivetrains as well as racing units going all-out on the street or track. 4-Speed Automatic Transmission for 5.3L 2007 Chevrolet Avalanche 1500 4x4 Used, Remanufactured, and rebuilt Transmissions available. Here are the main parts that you are going to need in order to make your own 4L60E to 4L80E swap kit. Problem here is a worn TCC regulator valve that causes the converter clutch to slip. There is much custom fabrication work involved in a six-speed swap as well as some additional high-performance hardware that you'll need, including purchasing or fabricating a custom mounting bracket and modifying the stock clutch pedal for the hydraulic-clutch master cylinder, modifying or fabricating a complete transmission crossmember, relocating the shifter hole in the floor of the car, shortening the driveshaft and possibly changing its yoke, and even installing a small-diameter starter and having custom headers built for clearance. Chevy Avalanche 2006, Automatic Transmission Oil Cooler by TYC. It could be internal transmission failure, low transmission fluid, or a faulty Vehicle Speed Sensor (VSS sensor). The easiest cure is to fabricate a steel or aluminum spacer to raise the back of the trans and slip the spacer in between the mount and the transmission to give it the necessary clearance (see photo). Matt Dinelli and his team at Attitude Performance in Arlington Heights, Illinois . It is ideal for vehicles powered by 4.8, 5.3, LS1, or 6.0L engines producing up to 500 horsepower with a naturally aspirated system . Privacy Policy. Centerforce has come to the rescue and offers a clutch, flywheel, and pressure plate made to adapt this trans to early, two-piece rear-main-seal small-blocks. Changing transmission fluid in your 6l80e can range from easy to a major pain average DIY weekend mechanic. Chevy Avalanche Years To Avoid - What Are Its Worst Years? I had two mechanics from General Motors and an independent transmission specialist tell me that Avalanches built prior to 2007 had a congenital type of transmission defect. Just use the code "SHIPFORFREE" when you check out. Avalanche Performance Chips send your restrictive stock settings packing. Who has the most miles on their 07+?? 1999 Chevrolet Suburban K2500 7.4L 4X4 This T56 is a direct replacement for the weakling T5 trans that came stock in third-gen Camaros. 2001-2006 Chevrolet Silverado 2500HD 6.6L 4X4 x 16 in. For Chevy Avalanche 1500/2500 2002-2006 Automatic Transmission Oil DIY: Finally! 2010 Chevrolet Avalanche 4WD Crew Cab LS Financing Available Our JEGS 4L60E transmission can handle up to 450 HP. Home Delivery. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Chevy transmission won't shift, stuck in 1st gear or limp mode - Speedometer may display zero at all times. Provides consistent shift performance, even in extreme conditions. Availability: The 4L60-E is a transmission that's good or bad, depending on the vehicle that you own. The Jegs 555-603025 transmission is warranted for 1-year from date of purchase regardless of installer. Absolutely the best available on the planet. BILLET INPUT SHAFT This issue can obviously cause a number of serious drivability issues. Material: Cast Aluminum. The 4L60-E has a weight of 190 pounds with fluids, and a length of 23.5 inches, whereas the 4L80 is 236 pounds with fluids and has 26.4 inches. If the vehicle doesnt move in any range, once you eliminate all other possibilities, the output shaft splines in the 6L80E transmissions or 6L90E transmissionsmay be stripped away. Quantity: 1 Piece. When performing an overhaul, remove the rod and closely inspect for wear or damage. The transmission can also be used in an older vehicle when converting to an electronically controlled overdrive transmission. Texas Speed & Performance DOD / AFM Delete Kit for 5.3/6.0/6.2 Engines. The Chevy Avalanche has been rated as one of the Top Large Light Duty Pick Ups by JD . 5.3 Vortec Gas Mileage. The original TH350 and PG driveshaft won't need to be shortened because it's already the correct length, but you must replace its slip-yoke with a 32-spline unit from GM (PN 14075214). Case Material: Aluminum . My name is Stefan; Im the owner and lead writer at TheDriverAdviser.com. Fits all input carrier styles. *A Non-DOD Cam is required *Aftermarket Camshafts available. The TH700R4 was renamed "4L60" (RPO MD8) following the new General Motors naming convention when the electronic version, 4L60E (RPO M30), was phased in as the 4L60 was being phased out.This happened in 1993 for trucks, vans, and SUVs, and 1994 for rear wheel drive passenger cars. Good transmission fluid will have a reddish color to it, but if it looks dark, almost brown and has a slight burnt smell to it, then you are very past due on your maintenance. A larger 6.2-liter V8 is the optional 420 horsepower, 460 pound-feet of torque engine. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.

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chevy avalanche transmission upgrade