On a 2002 Jeep Liberty are transmission shift points computer adjustable?

Answer 1

On 2002 the Jeep Liberty (KJ) has a 45RFE transmission. This is an electronically-controlled transmission with five forward ratios including an alternate second gear ratio for improved performance for passing and better fuel economy. It was designed for Jeeps but was used later in Dodge Trucks; its first use was in the 1999 Grand Cherokee V8. The transmission features a tall, 3.00:1 first gear that gives the driver better initial acceleration. Real-time driver adaptive shifting fine-tunes the shift pattern to the driver, while an alternate second gear ratio gives the driver five forward ratios.

During acceleration, second gear has a ratio of 1.67. Depending on speed and throttle position, both this gear and an alternate 1.50 second gear ratio are available for kick-down operation, making the down-shift smoother. Its reverse gear ratio is equal to the first gear ratio, to allow for heavier loads. Other features include three planetary gear sets that combine the widest range of gear ratios available in any transmission in its class. Combined with precise step selections, this brings smooth shifts and maximum power and optimal fuel economy. Later, the KJ mounts a 42RLE transmission, who was the first electronically shifted hydraulic automatic transmission that used fuzzy logic to learn to adapt its shifting pattern to match the driver's habits and tastes, as well as to compensate for internal conditions. Source (allpar.com)