'97 SL2 Hard Shifting and Loss of Horsepower
I have a 1997 SL2 Sedan DOHC automatic transmission that is just at 110,000 miles and has had perfect maintenance and upkeep throughout it's life.
Just yesterday it started shifting through the gears very hard, as if someone was slamming the whole car each time the gears shifted either up or down.
The transmission fluid and filter were just serviced a few days ago and I wanted to know what the general consensus was.
My fiance's father is a former UAW employee and said it probably is a lack of pressure in one of the vacuum lines, but my question is which one and how do I determine which it is / replace it? He can't physically help me because I live on the coast and he's in the midwest.
Also through looking at other posts about this similar topic other people have said it could be: Throttle Position Sensor, Valve Body, Pressure Regulator, Transmission Shift Module, or even the Vehicle Speed Sensor.
Which makes the most sense and do you suggest I do this myself or pay a pro? (I've done a lot to this car myself and am fairly mechanically inclined)
Also a secondary problem I'm having is when I turn on the AC I have a huge loss in Horsepower and I wanted to know if there was something I could do, other than replacing the entire unit about this issue?