Ok problem one. Since vie gotten new rims....

1. Automatic when going down the road and how the Rpms like shift on it's own u kno like... An automatic. When it gets near 45 it won't come down from a shift as if I'm in gear 2 cause it's happened to me
Before n I didn't kno what it was till I looked down n saw I had it shifted on the d2. But thistime it's not likethat n it's stays revvig till I let go of the gas n let it go for a while n does it on it's own with a little jump type push feel. I'm really concerned about this. Do I need a tune up n timing belt have anything to do with it or my aftermarket 17s rims.

2. Driving down the road at 70 n yere was this vibrating towards the back...like every five seconds would be 5 seconds normal then five seconds vibrating...then over n over till I slowed down to get off the ramp.....any ideas as to y?

3. New rims again brakes aren't responding as quickly and as strong when I slamm on the brakes almost ran a stop sign I didn't see it so I slammed on it not to hard but as usual likening would do since I am a rough crazy driver n it kept going n i was pressing it forcefully n took linger to stop with more force...husband says probably the rims since they are a bit heavier n larger than my tiny 14s when I had my 14s everything was good n I never had none of these problem n the day i get my 17s problem are starting to show.....pls dnt letthis be a bad decision... :'-(