2002 Grand Carvan - tranny bucking
#1
2002 Grand Carvan - tranny bucking
Have a 2002 Grand Caravan with 140K miles, original owner. Recently a strange thing started, where the transmission has a bucking feel when car is in gear and not moving (such as waiting at a light). Here's the weird part; this only happens when the climate control power switch is turned on. If I turn the power switch off the bucking goes away. Doesn't happen in park and doesn't happen when the car is underway. Never saw anything like this. Is it vacuum related? Any ideas would be appreciated.
#4
The load of the A/C compressor cycling on will cause a small surge sometimes. I had this issue with my van, it started first when sitting still in Drive, then it started bucking at 40-60km/hr when accelerating gently then it threw a CEL for a bad EGR valve. Replacing the valve made my problem go away. I happened to have the scanner connected when it threw the code and it first had a pending EGR code then about 10 minutes into the drive the light came on and it set the code and took a freeze frame. Perhaps check for pending codes and see if you are also experiencing an EGR problem?
#5
#6
Second erratic tranny caused by an alternator I've read about today. On the other one the odo was increasing with the key off too. Odd.
#7