Re: Transmission Double Downshifting
Could need an intake cleanup to help with the mileage, or new O2 sensors. Mileage is such a subjective thing though, so many different factors can play into it.
As far as the downshifting on cruise I remember my old 4.0L ZJ would do that and I never really tried to do anything about it. I always thought it was a combo of the smaller engine/transmission and cruise control not reacting quickly but steadily, it seemed like cruise would "stomp on it" causing it to downshift sharply momentarily. Lol not sure if I made much sense here but hopefully this helps somewhat, maybe someone else will chime in with a solution.
My Jeep: 2001 Grand Cherokee Limited, 245/65R17 Falken Rocky Mountain ATS, K&N drop in air filter, Bilstein HD's. De-badged, eagle-eye LED Tails & LED 3rd brake light, Addco front and rear sway bars, Superchips tuned & TM snip, interior 6k LED's, Gen3 ccfl projectors with Volt 6k HID lows, akebono brake upgrade with R1 Concepts premium rotors.