hrm, couple new issues

[Sr240sx]

A few issues that I'm not worrying too much about, but they're there

the car gets a shudder sometimes whilst driving or idling with the a/c on full bore... not used to this happening. and i don't believe it's from the compressor kicking on, because it happens fairly frequently. it's not very noticeable, but there.

second, the tranny wants to hold onto gears when you go at it full-bore. it gets to 6.5k and just sticks there, so long as you keep the pedal to the floor. backing off a wee bit lets it shift, but it shouldn't be hanging onto gears like that. normal driving is perfectly smooth and normal.

any thoughts?