FIX IT OR GET RID OF IT 98 intrigue 130,000k

First thanks for all input n advanced. Now where should i start i got alot of problems with my 98 intrigue, i'll list them #1. hard shifting when the car gets warm or hot, #2. dont know if its the engine or trans on this 1 but erratic shaking coming from 1 or the other (its not the steering) when im at lower rpms (cruising) at any speed to the point that i have to accelerate out of lower rpms to make it stop,#3. CES light codes o2 sensor heat malfunction, evap error, #4. minor starting issue maybe my starter going cause of my remote start timing. Things done so far #1 new ac compressor and evap cannister, engine & tranny flush, new spark plugs and wire pcv valve, air filter . I dont know if this has anything to do with it but the errattic shaking started after i put bg cleaner threw my gas . i think most of it is sensors but i dont know thanks i need help i need to fix it , I need 1 more year out of it

#1. hard shifting when the car gets warm or hot

A tranny flush is not a great idea especially with a car at 130k miles, take the tranny pan off and use a new filter. Clean all of the gunk from your tranny pan, the gasket is reusuable. Torque the tranny bolts evenly ~8ft lbs.

goto Napa and try a pint (or two) of LubeGuard ~$12 (may need to take a pint of existing tranny fluid out), look in the owners manual and make sure the tranny fluid height is correct =use their procedure. This should help and hopefully free up those tranny solenoids that are sticking.

These cars need to be maintained or else it's big $$$$.