As a premium extension of the Jeep® brand, the Grand Wagoneer marks the return of a premium American icon. So what better vehicle to introduce one of the most anticipated new powertrains in decades from the Chrysler Group.
The all-new turbocharged 3.0-liter inline-six, known internally as the “GME-T6” will make its world debut this month at the New York International Auto Show (NYIAS). The new GME-T6 is part of the Stellantis Global Medium Engine family and is the first inline-six to be under the hood of a Jeep product since the legendary 4.0-liter inline-six was discontinued.
Thanks to our well-placed sources, we know that there will be three variants of GME-T6 available for future Stellantis products. The first version to enter the mix, which will debut in the Wagoneer lineup next month at NYIAS, will be the High-Output (HO).
We know for sure that the HO version will debut at NYIAS. Our sharp-eyed spy photographers caught one of the new HO models testing on public roads around the Metro Detroit area. While the spy shots don’t show much change from the HEMI-powered models, we can see that the GME-T6 HO models will have dual exhausts and will require premium unleaded fuel (according to the decals above the fuel cap). With gas prices on the rise, hopefully the new GME-T6 HO can achieve good enough fuel economy to justify the demand for premium fuel.
Of course, Jeep currently recommends 91 octane premium fuel for the 6.4-liter HEMI V8-powered Grand Wagoneer models.
The 3.0-liter GME-T6 HO inline-six will be followed by a plug-in hybrid (PHEV) model in 2023.
The GME-T6 PHEV arrives just in time, as gas prices continue to rise in the US and Canada. The PHEV should run a similar system to the recently launched Grand Cherokee 4xe.
We expect the 8-speed automatic transmission 8P75PH from ZF to be fitted to the GME-T6 PHEV. The ZF unit has a high-voltage motor-generator rated at 134 horsepower (100 kW) and 181 lb.-ft. (245 Nm) of torque, is mounted on the front of the transmission and replaces the conventional torque converter in an automatic transmission. Two clutches work to handle power and torque from the e-motor and the engine. A binary clutch (on/off) is fitted between the motor and the motor. When this clutch is open, there is no mechanical connection between the engine and the e-motor, allowing it to drive the vehicle in electric-only mode.
We also believe that the GME-T6 PHEV will be equipped with an eTorque high-voltage, liquid-cooled motor-generator unit assembly at the front of the engine, replacing the conventional alternator. A robust belt connects the engine alternator to the engine crankshaft pulley. The engine generator spins the engine for near-seamless, fuel-saving start-stop operation and generates electricity for the battery pack. Currently, Jeep 4xe models do not use a conventional 12-volt starter motor. Instead, they are equipped with a 12-volt battery to power accessories.
Nothing has been confirmed about the introduction of the GME-T6 PHEV model at this year’s NYIAS.
There is an expectation that the long wheelbase (LWB) variants of the Wagoneer and Grand Wagoneer (WS) will also be introduced at the NYIAS event. Press conferences are scheduled to be held on Wednesday, April 13 and Thursday, April 14. You can expect us to cover the entire event on whatever day it happens.
For those who are current Wagoneer/Grand Wagoneer owners or considering purchasing one, be sure to visit our dedicated owner’s website, WagoneerForums.org. There you can talk about the latest news, information and rumors, as well as connect with other owners and even Wagoneer Client Services.
2023 Jeep® Grand Wagoneer Series II GME-T6 Tester Photo Gallery: