What would cause a shudder under load
This is on my stock tranny (4L60E) in an 02 envoy, I was taking my tandem axle 14' trailer (about 1300 lbs) for it's annual inspection and I felt a shudder under load. I'm almost positive the TC was l...
Forum Discussion
bartlettj wrote:
When was the last time you changed your spark plugs and wires? This may be an engine misfire and not necessarily a transmission problem.
No wires, coil on plug, plugs are new...maybe 1K Miles.
Cloud Dancer wrote:
Does the operator's manual say to NOT tow in overdrive?
No, manual states you can tow in OD.
Driveshaft looks good, plenty of room to move forward. I pick up the trailer tomorrow so I will test the lockup again. I have a TCC valve on it's way so I am going to do away with the PWM control and change it to an on/off lockup. Apparently this is a common mod.
