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Gary
Gary, Chevy Technician
Category: Chevy
Satisfied Customers: 16635
Experience:  15 years GM master tech
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No overdrive on my 2001 SS. max out at 3500 RPM approx. 50

Customer Question

no overdrive on my 2001 SS. max out at 3500 RPM approx. 50 MPH
JA: What is the model of your '01 Chevy?
Customer: monte carlo
JA: Are you fixing your Monte Carlo yourself? What have you tried so far?
Customer: it just started today. I hope to do it myself
JA: Will the headlights turn on? Is the battery fully charged?
Customer: ill go check
JA: Anything else you want the mechanic to know before I connect you?
Customer: it throws a misfire during the issue
Submitted: 9 months ago.
Category: Chevy
Expert:  Gary replied 9 months ago.

can you tell me all the codes setting ?

it will only not go into overdrive when it is misfiring ?

is this the 3.8 engine in it ?

Customer: replied 9 months ago.
3.8 L has a historic code for P0300 engine misfire. It does not stay active though. it has a sputter during acceleration I assume that is needed coils and plugs. It has 32,000 miles. But I don't think that would cause the transmission issues.
Customer: replied 9 months ago.
shifts fine until overdrive
Customer: replied 9 months ago.
just looked at this issue again. It is a lack of power issue. Not overdrive. the issue happens in every gear. weak torque. slow acceleration.
Expert:  Gary replied 9 months ago.

no transmission codes ?

Expert:  Gary replied 9 months ago.

will it bog down when you floor it ?

Customer: replied 9 months ago.
no codes. but alittle bog. but wont kick into high RPM
Expert:  Gary replied 9 months ago.

if you pull out the back O2 sensor out of the rear exhaust manifold and take it for a quick road test will it stop doing this ?

it will be a little bit loud but this is for testing purposes

Customer: replied 9 months ago.
does it have to be pulled out or just disconnected?
Expert:  Gary replied 9 months ago.

pulled out

we have had alot of problems with bad cat converters causing this kind of issue

Customer: replied 9 months ago.
ok. pull it out and if it does get better it is the cat? ill have to do it later.
Expert:  Gary replied 9 months ago.

that is correct

a restricted cat will cause the bogging and will not allow passing gear as the engine does not have the power is needs due to the cat being restricted

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