It’s possible that for marketing reasons Jeep wanted to introduce the HO with the new Overland model, and to have a key option added to the list of new features being implemented for 2002, the start of the second half of the WJ generation. Even more interesting is the axle ratio, which has never been used on any other Grand Cherokee model, 3.91 !įor reasons unknown, the HO engine was held back until the 2002 model year. Components included exclusive springs (ZKN/ZKT front and ZYN/ZYT rear), Goodyear P235/65R17 BSW AS/P tires, chrome tow hooks and the skid plate package. These special 2001 HO models also included an exclusive “Sport suspension”, different than that of the Up Country package. Colors were Stone White, Patriot Blue, Flame Red, Sienna and Champagne. The first HO engines were assembled in the fall of 1999 and put into 2001 model pilot Grand Cherokee’s in early February 2000! Twelve of these models were built, complete production versions right down to the HO badges. Plans for a “future” HO version of the 4.7 were put together when the new engine was original designed for the 1999 model year, back in 1996/1997. Several 2001 Grand Cherokee models were built with the 4.7 HO engines back in 2000! What no ones realizes, and being revealed here for the first time, is that the HO engine was originally planned for the 2001 model year. Ho engine model availability – Grand Cherokee Starting at the end of the 2005 model year, the 4.7 HO engine became availble in the Dodge Dakota. The all-new 2005 model Grand Cherokee’s offered the new 3.7 V6, the standard 4.7, the 5.7 Hemi and the new 6.1L Hemi SRT engines. The HO engine was discontinued in the Grand Cherokee at the end of the 2004 model year. The HO engine is designed to run perfectly on standard octane fuel, but for maximum performance Jeep recommends premium fuel. The performance modifications (listed in the chart below) added 30 horsepower and 30 Ft.-Lb. For the 2004 model year, Jeep added the HO as an option on three new special models, the Freedom Edition, Columbia Edition and the Rocky Mountain edition. The HO engine was a Grand Cherokee exclusive for the 2002-2004 model years, available as an option on Limited models and standard on the Overland – but not available on the Laredo. A performance enhanced “HO” version of the popular 4.7-Liter V8 engine made its premier in the 2002 Grand Cherokee.
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