01' monte trans problem

[mschooley]

Have a 2001 monte carlo that seems to be surging in and out of overdrive. This doesn't happen all the time but when it does I can hit the pedel to downshift and is fine. No trouble lights on or anything. Only seems to do it in overdrive.

[fist]

I would take that to the tranny place! It could be a variety of things!

[ypsidave]

check cat converter was having same problem recently

[LadyMonteSS]

had the same problem, had an exhaust manifold leak,had the manifold repaired and the problem was gone, check for any exhaust leaks before o2 sensor

[corning_d3]

same prob here with a donut gasket on the manifold leaking. Isn't that wierd, though?? Exhaust controls transaxle......