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Saturn engines evolved from independent GM designs focused on reliability and innovation (the 1.9L S-series) to globalized GM powertrains (Ecotec and LY7) before the brand’s closure in 2010. The first-generation Saturn engines were entirely unique designs, not borrowed from any existing GM product. The 1.9L inline-four engine came in SOHC and DOHC variants, producing 85 to 124 hp. These are used in the Saturn S-Series. In 2000, Saturn adopted GM’s new Ecotec 2.2L engine, providing smoother performance and easier servicing compared to the 1.9L. Later, GM and Honda entered a supply agreement for the J35A3 3.5L V6, used in the Saturn Vue to deliver 250 hp and excellent reliability. Saturn’s final generation, Aura, Outlook, Astra, and Sky, used GM’s global Ecotec and High Feature V6 engines, marking its transition into mainstream GM architecture.
The 2004–2007 Saturn Vue with a V6 engine is powered by a Honda-built 3.5-liter J35A3 V6, the same one used in the Honda Pilot and the Acura MDX. Saturn Vue's with this V6 engine came with a Honda 5-speed auto trans that was also built in Honda's Ohio plant. The 2002-2003 Saturn Vue, on the other hand, ran non-Honda engines, being fitted with GM's 3.0L L81 V6, which was a job handed over to Opel in Germany.
The 2005 Saturn Vue continued to run on the Honda 3.5L J35 engine, whereas the 06 model year marked the end of the line for Vues with a Honda-sourced powertrain. As for the four-cylinder Saturn Vues, they all ran on GM's 2.2L Ecotec engine, built right here in Tennessee, and had no parts in common with Honda vehicles.
Talking about interchanging the Saturn engines with other makes, some of the most common cases are: firstly, the Saturn Vue engine built from 2004 to 2007, the J35A3 V6 engine, could be shared directly with the Honda Pilot and Acura MDX, and earlier 2003 Vue models could be interchanged with GM’s L81 V6. The Saturn Vue models built from 2002 to 2003 also used GM’s 3.0-liter L81 V6 engine, engine code L81, produced by Opel in Germany and also fitted in the Opel Vectra, Opel Omega, and Cadillac Catera.
According to General Motors Powertrain documentation (2003), four-cylinder Saturn Vue models were fitted with the VTi continuously variable transmission (CVT). The 2003 Saturn Vue transmission was developed jointly by GM Powertrain and Luk. GM issued a 2004 service bulletin noting reliability problems that led to the CVT’s discontinuation. For 2004, Saturn replaced the Opel-built V6 with Honda’s J35A3 3.5-liter engine and its matching Honda MJ7A five-speed automatic transmission. The Honda-sourced 2004 Saturn Vue transmission was identical to that in the 2004 Honda Pilot and Acura MDX, including gear ratios and torque capacity.
Later in 2008, the Saturn Vue was redesigned on GM’s global Theta platform. The 2008 Saturn Vue Transmission / “08 Saturn Vue Transmission” was used in the new 6T70 and 6T75 six-speed automatic transmissions, produced by GM Powertrain. “If you want to explore more information about Saturn transmissions, visit our website.”
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