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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Buick Technician
Category: Buick
Satisfied Customers: 29588
Experience:  GM Grand Master Technician 2007. 11 years experience.
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GM 2003 Buick Lesabre Transmission shifts very hard from

Resolved Question:

GM 2003 Buick Lesabre : Transmission shifts very hard from a stop. EX. Stop sign, rolling forward apply gas and it hits very hard, but most of the time shifts normal. Vehicle has 145,000 miles, maintenance intervals maintained and has never been a problem since day one.
Submitted: 8 years ago.
Category: Buick
Expert:  GM Tech (Cam) replied 8 years ago.
Welcome. When this happens, does it shift hard through all the shifts?
Customer: replied 8 years ago.
No, only when you stop and start rolling forward then the vehicle lurches forward, after the hit shifting is normal. Remember this does not happen all the time.
Expert:  GM Tech (Cam) replied 8 years ago.
OK, a harsh shift is dues to high pressure caused by a pressure control solenoid failure. Another condition that has caused the computer to request high pressure to compensate for a low pressure or slipping issue. Finally is this could be a failed accumulator that is designed to cushion the hydraulic apply or a valve in the valve body to control the fluid flow. The pressure control solenoids are known for causing issues in these transmissions.
Customer: replied 8 years ago.
Sounds resonable, who should I get to perform work a dealership or...
Expert:  GM Tech (Cam) replied 8 years ago.
A dealer may be the best, XXXXX XXXXX reputable shop that you trust should be just fine.
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