So I had a 9 speed camry before my 19 trailhawk. My jeep is way smoother. It's a bit more shifting at the earlier gears but I would say that the complaints with the 9 speed cherokees is mostly solved. The 2020 camry I had was constantly shifting at highway speeds for efficiency and it annoyed the piss out of me. I think you'd be pleasantly. 9G-Tronic is Mercedes-Benz's trademark name for its nine-speed automatic transmission, starting off with the W9A 700 (Wandler-9-Gang-Automatik bis 700 Nm Eingangsdrehmoment; converter-9-gear-automatic with 516 lb-ft maximum input torque; type 725.0) as core model. The Fiat Chrysler (FCA US) 9-speed transmission class-action includes all consumers who purchased or leased a new 2014-2015 Jeep Cherokee, 2015 Jeep Renegade, 2015 Chrysler 200 or 2015 ProMaster City. In addition, the consumer must still own the vehicle and it must have been purchased or leased in the U.S. How the Tractor trailer 9 speed works-Please watch: ' 🔴 Bad CDL Schools' https://www.youtube.com/watch?v=mqnXDPWPiSQ-.

• 9 Speed Transmission Fluid
• 9 Speed Transmission Problems

ZF 9-speed automatic transmission for transverse engines

Jeep will recall nearly 83,000 Cherokee SUVs for a troublesome transmission that has plagued the vehicle since its debut.

Last month, Jeep said it would recall 2014 Cherokees equipped with a 3.2-liter V-6 and 9-speed automatic for faulty clutches that could shift the car into neutral without warning. Jeep said it is unaware of any injuries related to the problem.

Jeep recalled 2014 Cherokees once before for similar transmission issues and has issued several updates to dealers to address poor shift quality or erratic behavior. In 2015, Jeep authorized replacements of many transmissions in 2014 Cherokees and 2015 Cherokees built before March 3, 2015.

Car and Driver reported similar complaints and issues with many other vehicles equipped with the ZF-sourced 9-speed automatic that range in severity. Owners of Fiat ProMaster City vans; Acura TLX sedans; Jeep Renegade, Land Rover Range Rover Evoque, Land Rover Discovery Sport, Fiat 500X, and Honda Pilot crossovers have all reported some issue with their related 9-speed automatics, which were supplied by ZF.

In many cases, the transmission software was updated, but many owners have complained to federal regulators about the transmission's behavior. In one case, an owner of a 2017 Acura TLX reported that the car was stuck in third gear, would not accelerate, and all of the car's warning lights were illuminated. The car stopped, but would not reverse.

In 2015, ZF supplied tips for driving cars equipped with its 9-speed automatic and said American driving styles, and the transmission's adaptive learning could be attributed to lumpy shifts. In 2016, a wider recall of Fiat Chrysler Automobiles, Land Rover, and Acura vehicles blamed a bad wiring crimp in the transmission that dated to July 2014. Since then, Jeep said it has replaced thousands of transmissions.

Jeep said it would begin notifying affected owners next month to bring their vehicles to dealers. Jeep didn't say what the fix would be for those cars, but said a remedy is under development.

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9G-Tronic is Mercedes-Benz's trademark name for its nine-speed automatic transmission, starting off with the W9A 700 (Wandler-9-Gang-Automatik bis 700 Nm Eingangsdrehmoment; converter-9-gear-automatic with 516 lb-ft maximum input torque; type 725.0) as core model.

Abstract[edit]

In all applications this transmission is identified as the New Automatic Gearbox Generation Three, or NAG3. Initially it debuted on the E 350 blueTEC in 2013,^[1][2] before launched in the Mercedes-Benz S-Class (W222). It has been expanded to be used in the Mercedes-Benz C-Class (W205) and the sedan and wagon variants of the Mercedes-Benz E-Class (W213). This transmission was later introduced on Mercedes-Benz M-Class (W166) facelift on the GLE 250 d model. V12 engine models continue to use the older Mercedes-Benz 7G-Tronic transmission. By the end of 2018 unsurpassed ratio span among longitudinalautomatic transmissions for passenger cars.

It is also fabricated by Jatco for use in Nissan and Infiniti vehicles.^[3][4]

Specifications[edit]

Basic concept[edit]

Technical and economic progress is reflected in nine forward gears^[a] out of ten main components,^[b][5] compared to 7 forward gears^[c] out of 11 main components^[d] in the direct predecessor. It is fully electronic controlled. Torque converter lock-up can operate in all 9 forward gears.

Gear ratios[edit]

Nomogram[edit]

9 Speed Transmission Fluid

▶️ Interactive Nomogram
This nomogram is a real geometric calculator exactly representing the rotational speeds of the transmission's 3x4 = 12 internal shafts for each of its 9 ratios (+ reverse), grouped according to their 4 permanent coupling on 3 joint ordinates and 5 independent ordinates. These ordinates are positioned on the abscissa in strict accordance with the proportions of the sun gears' teeth numbers relative to those of their rings. Consequently, the output ratios on the 3rd ordinate (carrier of the third planetary gearset) follows closely those of the actual transmission. This advantageous geometric construction sets us free from Willis' famous and tedious formula, because all calculations are exclusively determined by lengths ratios, respectively teeth numbers on the abscissa for the 4 epicyclic ratios, and of rotational speeds on the 3rd ordinate for the 10 gear ratios.

Legend:
A : Brake (blocks s2 sun gear)
B : Brake (blocks r3 ring gear)
C : Brake (blocks c1 carrier gear)
D : Clutch (couples c3 carrier gear with r4 ring gear)
E : Clutch (couples c1 carrier gear with r2 ring gear)
F : Clutch (couples s1 sun gear with c1 carrier gear)

Applications[edit]

Mercedes models[edit]

Mercedes C-Class[edit]

• 2015–2017 Mercedes-Benz W205 (some models)
• 2018–today Mercedes-Benz W205 (all models)

Mercedes E-Class[edit]

• 2014–2016 Mercedes-Benz W212 (E 350 BlueTec only)
• 2016–today Mercedes-Benz W213 (all models)

Mercedes S-Class[edit]

• 2017–today Mercedes-Benz W222 (all except V12 models)

Non Mercedes-Benz models[edit]

• 2021–present Aston Martin DBX
• 2020 Nissan Titan (Jatco JR913E)

See also[edit]

Notes[edit]

1. ^plus 1 reverse gear
2. ^4 simple planetary gearsets, 3 brakes, 3 clutches
3. ^plus 2 reverse gears
4. ^4 planetary gearsets (Ravigneaux planetary gearset considered as 2), 4 brakes, 3 clutches
5. ^First version with a gear ratio span wider than 9:1 as widest among longitudinal automatic transmissions for passenger cars at that time
6. ^Second version introduced without notice with the Mercedes-Benz E-Class (W213) to reduce the step between gear 4 and 5 below the one of the 7G-Tronic (1.3684:1)

References[edit]

1. ^'New nine-speed automatic transmission in the Mercedes-Benz E 350 BlueTEC: Premiere of the new 9G-TRONIC - Daimler Global Media Site'. Media.daimler.com. Retrieved 2020-01-16.
2. ^'Mercedes-Benz E350 BlueTec gains nine-speed automatic transmission'. Retrieved 22 July 2013.
3. ^'Daimler-Renault-Nissan – The alliance in action'.
4. ^'Fact Sheet:Press Releases and Project Overview Daimler & Renault-Nissan Alliance'(PDF).
5. ^ ^ab'System description'(PDF). documents.epfl.ch. Retrieved 2020-01-16.
6. ^'Der neue Mercedes-Benz SL: Die Legende – jetzt noch dynamischer - Daimler Global Media Site'. Media.daimler.com. Retrieved 2020-01-16.

External links[edit]

9 Speed Transmission Problems