I have a 2001 monte carloss recently the transmission will work fine then all of a sudden, it will shift real hard and you can hear a whinning sound when you are driving it. The tranny shifts when it is supposed to, but not sure why it is doing it. It only had 65,000 miles on it

 

My 97 has somewhat of the same problem. I get the whine when Im going up a hill under load. My tranny doesnt shift hard but it takes a little longer than normal for it to shift from park to drive or reverse. We both have the same trannies so maybe we have the same problem. BTW mine does this with only 36000 miles if it makes you feel any better.

 

The first thing to do is check the level of the Transmission Fluid and make sure its right up to the top of the line on the dipstick with the engine running at idle.

 

the tranny level is full. i'm not sure if maybe a tranny flush would help or fix it.

 

with the 2001 ss my fiends 02 ls had the same problem and it was the catylitic converter and there is a tsb on the cat for a warranty extension so go to chevy and have them check it out. here is the write up

Campaign - Catalytic Converter Warranty Extension
Special Policy Adjustment - Catalytic Converter
# 05551 - (Sep 14, 2005)

Models:
2001-02 CHEVROLET IMPALA, MONTE CARLO
2001-02 PONTIAC GRAND PRIX
2001-02 BUICK REGAL

EQUIPPED WITH 3.4L (RPO LA1 - VIN E) OR 3.8L (RPO L36 - VIN K) V6 ENGINE
Condition
Some customers of 2001-02 Chevrolet Impala, Monte Carlo; Pontiac Grand Prix; and Buick Regal model vehicles, equipped with a 3.4L (RPO LA1 - VIN E) or 3.8L (RPO L36 - VIN K) V6 engine, may experience a condition where the vehicle exhaust catalytic converter is replaced due to complaints of lack of power or illumination of the Malfunction Indicator Lamp (MIL). This may be due to the front endcone insulation from the catalytic converter breaking away and blocking the front of the first catalyst brick and preventing the free flow of exhaust gas through the converter.
Special Policy Adjustment
This special policy covers the condition described above for a period of 10 years or 120,000 miles (190,000 km), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership. The repairs will be made at no charge to the customer.
For vehicles covered by Vehicle Service Contracts, all eligible claims with repair orders on or afier September 15, 2005 are covered by this special policy and must be submitted using the labor operation codes provided with this bulletin. Claims with repair orders prior to September 15, 2005 must be submitted to the Service Contract provider.
Vehicles Involved
















Involved are all 2001-02 Chevrolet Impala, Monte Carlo; Pontiac Grand Prix; Buick Regal model vehicles, equipped with a 3.4L (RPO LA1 - VIN E) or 3.8L (RPO L36 - VIN K) V6 engine and built with the VIN breakpoints shown.
















Parts Information
Parts required to complete this special policy are to be obtained from General Motors Service Parts Operations (GMSPO).
Customer Notification
General Motors will notify customers of this special policy on their vehicles (see copy of typical customer letter shown in this bulletin - actual divisional letter may vary slightly).
Claim Information
















For vehicles repaired under the terms of this special policy, submit a claim with the information shown.
Customer Reimbursement - For US
All customer requests for reimbursement for previous repairs for the special policy condition will be handled by the Customer Assistance Center, not by dealers.

































A General Motors Special Policy Customer Reimbursement Procedure Form is shown.
Important: Refer to the GM Service Policies and Procedures Manual, section 6.1.12, for specific procedures regarding customer reimbursement and the form.

Customer Reimbursement - For Canada and Export
Customer requests for reimbursement of previously paid repairs to correct the catalytic converter are to be submitted prior to or by September 30, 2006. Repairs must have occurred within the 10 ye

 

i just had the converter replaced two months ago

 

Have somebody with a scan tool check your Monte for any diagnostic trouble codes.Many transmission related DTC's will not turn on your "Check Engine" or "Service Engine Soon" lights but will cause the PCM to operate your transmission in "default mode".When in default mode the PCM raises the transmissions oil pressure which results in harsh shifting and elevated transmission oil pump noise.Also when in default mode the car will usuallystart out in 2nd or 3rd gear from a stop,making the car seem very low on power when accelerating from a stop.All of this is done to protect the transmission when there is a malfunction that could potentially cause transmission damage.

 

Bowtietech, it is sooooo nice to have you here. Please don't leave us.

 

amen, glad to have another GM guy.

 

There's nothing like the "Voice of Experience" to help people who might otherwise think something else was the matter.

3 Cheers to Bowtietech for setting the story straight on that.
Thank you very much.

Sound effects:
Crowd chanting ...

MVP... MVP!