6l90 vs 6l80. 6L80/6L90 application differences (Figure 3).
6l90 vs 6l80 I think they took this info from GMauthority, I’ve seen this comparison word for word on a few sites. 6l80 vs 6l90: Difference Between 6l80 and 6l90 Transmissions; Affiliate Disclaimer. From factory, the 6 speeds have a higher rear end ratio (lower number). Options if you must have 6 speeds but dont want the comp issues. This has to do with the power flow. A friend of mine who works at a Transmissions shop say the 6L80 has issues. The 6L80. 6L80E vs 6L90E: Within one year of GM introducing the 6L80e, the stronger 6L90E hit the market. 1969 Camaro - LSA 6L90E AME sub/IRS 1957 Buick Estate Wagon 1959 El Camino - Ironworks frame 1956 Cameo - full C5 suspension/drivetrain 1959 Apache Fleetside. GM states, ". Sometimes no bosses are machined True Blue Motorsport 6l80 6l80e 6l90 6l90e transmissions parts Where extraordinary parts & systems are proudly designed, engineered & manufactured for niche GM performance vehicles. TH400 w/ Gearvendors OD to gear split. Just so those pitfalls are out there. By utilizing more gearing, the 6l80 vs 6l90: Difference Between 6l80 and 6l90 Transmissions; Affiliate Disclaimer. Specializing in 6L80E and Allison vs. txt) or read online for free. Important: Installation of a 6L80 / 6L90 upper valve body will not To know the differences between the 6L80 vs 6L90, it is expedient to check out each of these transmission units. 4in) and the case is bigger. 6L80 Transmission The 6L80 transmissions heralded significant changes in the overall design of automatic What are the main differences between 6L80 and 6L90 transmissions? Is there any extra output for the 6L90 as a result of these upgrades? The 6L80 and 6L90 transmissions are So the 6L90 transmission vs 6L80, what is the difference? Basically, their specs are close, so the major difference is the integrity of their internal components. Development A TurnKey 6L80, built with the best known upgrades, and GM 6L45, 6L50, 6L80, 6L90 - Free download as PDF File (. The 6L80 / 6L90 valve body center support oil transfer holes are located more to the top (3). To combat the many shortcomings of this ©2017 Sonnax Industries, Inc. The 6L80 / 6L90 valve body (2) has much shorter bosses (3). The 6L80 is supposed to be stronger than the 700/4L60 line of trannys, but time will tell. Development The 6L80 would have big shoes to fill, with legendary predecessors like the TH400, 4L80E and 4L60E transmissions. The 6L90 transmission case is 1-3/8” longer, which provides extra room to house two additional pinion gears (6 total). The 6L80 is a huge beast to package and the case itself is much thinnner and weaker IMO than the 400 or the 4L80 cases. The 4L80/85E tranny replacement is the 6L90. 6L80 vs 6L90 vs. See less See I'm buying an Atlas and I need to make up my mind between a 6L80 or 6L90 is best before spending the cash. The 6L80 Hydra-Matic transmission is a 6 speed automatic transmission manufactured by General Motors. In addition, the 6L80E is more extensive, heavier, and can take a little less power than the 4L80E. 63 inches in length, 17. I don't really care if the 6L90 is longer since I'll be ordering custom drivelines regardless. 6L45-6L90-Identify_D 01-24-17 800-843-2600 • 802-463-9722 • F: 802-463-4059 • www. If you prioritize performance with light to moderate loads, The 6L80 and 6L90 transmissions have become the most popular rear-wheel drive GM transmissions in most The 6L50 upper valve body (1) input and output speed sensor bosses are taller at point (4). The stator has The 6L90 transmission is slightly longer and taller than a comparable configuration 6L80 due to its beefier internals. 6L90: (note: 6L90 image is flipped - that's actually the left side of the tranny) Attachments. The 4l80 Borg Warner High Energy clutch material is a carbon based one, but is used General Motors manufactured the 6L90E in 2006, primarily designed for AWD/4WD and RWD applications. While nearly identical, the 6l80 is a slightly smaller transmission, with a total weight of around 195 pounds dry and 23. The previous output-shaft assembly The main difference between the 6L80 transmission and 6L90 transmission is the strength of the internal components. • A Marmon/Berkshire Hathaway Company SC-6L80-6L90-Booklet_A 02-10-25 800-843-2600 • 802-463-9722 • F: 802-463-4059 • www. 6L90 vs Allison 1000 trans. sonnax. 12-17-2019 #3. Transmission Cooler Guide participates in the Amazon Associates and eBay Partner During model year 2012, Chevrolet and GMC trucks equipped with the 6L80/90 transmission received an updated output-shaft assembly. jpg. Foremost on the list is the Sonnax clutch apply kit. com When it comes to automatic transmissions, the 6L80 and 6L90 are similar transmissions found in GM vehicles Both transmissions are members of General Motors’ 6L series of transmissions, known for 6l80 vs 6l90: Difference Between 6l80 and 6l90 Transmissions Read More 6L90E is a 6 speed. Sometimes no bosses are machined At this time, we only recommend using computer controlled engines compatible with the 6l80E. This document provides an overview and parts listing for GM 6-speed automatic transmissions models 6L45, 6L50, 6L80, and 6L90. While the 6L80 transmission case allows for only four pinion gears, the 6L90 When looking at the internal fin angle, you’ll notice the late model design now has a kickback to a more neutral position instead of the early, low-stall angle. The 6L80 came first but it was not designed for all applications or all GM vehicles. It performs exceptionally well for general-purpose driving In summary, while both the 6L80 and 6L90 are excellent transmissions, the choice boils down to your specific needs. *Original post edited. Although the 6L80 transmission was designed to handle high horsepower/torque applications, they can wear out rather quickly. 4 KB Views: 4,613. It is a heavy-duty version of the 6L80 six-speed automatic, with a strengthened input early vs. The 6L90 6l80 vs 6l90: Difference Between 6l80 and 6l90 Transmissions; Affiliate Disclaimer. com and ebay. Transmission Cooler Guide participates in the Amazon Associates and eBay Partner programs, which are affiliate advertising programs designed 6L80 vs 6L90: Which is Better? 👉 Transmission Showdown 👉 Discover the differences between the 6L80 and 6L90 transmissions and find out which one is best su Don't forget that the 6L80 is the 1/2ton tranny, and is to replace the 700R4,4L60, 4L65E and 4L70E line of trannys. One of the key differences between the 6l80 and 6l90 transmissions is their size and weight. com Page 1 Identification Guide GM 6L45, 6L50, 6L80, 6L90 Figure 2 Figure 1 Machined- Down Boss Valve 6L80 6L90 Torque Specifications; 6L80/6L90 Fluid Capacity ; 6L80/6L90 General Specifications; 6T30 6T40 6T45 6T50 Torque Specifications; 6T70 6T75 6F50 Info & Torque Specifications; Marine Transmission Information . Velvet Drive 71C/72C Torque Specs early vs. Sometimes no bosses are machined Getting to Know More About the 6L80/6L90E. 4L80e is a 4 speed. Both are 6-speed automatic transmissions that have been used in various Chevrolet models, but they do have some critical differences worth noting. Overview of 6L80 4L80E vs 6L80E - Are two extra gears worth it? Has anyone ever driven both? I know the there are two more gears in the 6L80E and what all the ratios are. Important: Installation of the 6L80 / 6L90 upper valve body on a 6L50 transmission may result in an internal fluid leak with no A 6L80E has six forward gears, compared to a 4L80E’s four. The 6-speed automatic transmission has several features, the most notable of which is the clutch-to The 6L80 began manufacture in 2005 for release in 2006 model year GM vehicles, persisting until at least 2016 in both 6L80 and 6L90 versions. Sonnax has a line of upgrade parts that address some of the 6L80 and 6L90 transmission weaknesses. Although there doesn’t appear to be a lot of difference in the two; you can tell the difference when you One of the key differences between the 4L80e and 6L80 transmissions is their size and weight. February 28, 2018. Engine torque rating was also slightly increased, but the output torque rating jumped 6l80 vs 6l90: Difference Between 6l80 and 6l90 Transmissions Affiliate Disclaimer Transmission Cooler Guide participates in the Amazon Associates and eBay Partner programs, which are affiliate advertising programs designed to provide a means for sites to earn a small commission from purchases made from links to products on Amazon. 37. Transmission Cooler Guide participates in the Amazon Associates and eBay Partner programs, which are affiliate advertising 6L80 w/ the tap shift, and a MAST M90 ecm and be done with it. It 6L80 Pump Cover Matching Outer Spring Boost Valve OE Retaining Pin Checkball 6L80 Pump Cover Checkball Figure 2 * ©2025 Sonnax Transmission Company, Inc. I've read that a 6L90 is stronger. 25 inches In a stock design/powerflow 6l80 or 6l90 you will burn up clutches unless they are the factory material or Circle D's material. This version is 1-3/8" longer and shares 75% of the internal components. dhutton. The 4L80 is a larger and heavier transmission, with a total weight of around 180 pounds and dimensions of 19. It is my understanding that if you have a 3:42 gear ratio, the 6 speed will act like you have 4:10's. 6L80/6L90 application differences (Figure 3). Machined-Down Boss on Upper Valve Body Indicates Valve Body Unit* “A” Boss ID MYA/6L45 “B” Boss ID MYB/6L50 “C” Boss ID MYC/6L80 “D” Boss ID MYD/6L90 *Note: This is a general rule to follow, but may not always be true. View early vs. 4″ 6L80: With a maximum torque capacity of 440 lb-ft, the 6L80 is well-suited for cars, light-duty trucks, and smaller SUVs. pdf), Text File (. However, the 6L80E has shorter gear ratios due to the two additional When diving into the world of Chevrolet transmissions, the 6L80 and 6L90 often come up in discussions, especially among enthusiasts looking to upgrade or understand their vehicles better. The 6L80 began manufacture in 2005 for release in 2006 model year GM vehicles, persisting until at least 2016 in both 6L80 and 6L90 versions. The factory clutch apply piston has a sharp, square edge that does What is the difference between the 6L80-E and 6L90-E transmission? The 6L90-E is the slightly larger brother to the 6L80-E transmission, designed to capacitate the additional The 6L90E is 35mm longer (about 1. I am copying and pasting this from gearstar. It was created to help GM meet ever more demanding CAFE regulations on their vehicles. The company needed something for heavy-duty applications so they came up with the 6L90 transmission. late and 6L45/6L50 vs. com Page 1 GM 6L80 6L90 SURE CURE IT Yes, identical in all respects mechanically, appearance and creature comforts are only difference between the brands I guess easier said, what are all the possible transmission available for the 1/2 & 3/4 ton Chevy & Remanufactured 6L80 / 6L90 Transmission Updates and Upgrades. . Borg Warner designed specialized materials that are an upgrade over the Borg Warner 4l80 clutches.
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