Transmission hard shifts when warm

2003BUICKLASABREI

MEMBER
2003 BUICK LESABRE
3.8L
V6
2WD
AUTOMATIC
58,000 MILES

When warm hard shifting majority of time. When cold in beginning is okay.

Sunday, January 19th, 2020 AT 9:15 AM

7 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

Good afternoon,

This sounds like an issue with the valve body. There may be a weak or broken spring in the valve body.

https://www.2carpros.com/articles/automatic-transmission-problems

Are there any codes in the system?

How long since you changed the filter and fluid?

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

Roy

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Sunday, January 19th, 2020 AT 1:30 PM

2003BUICKLASABREI

MEMBER
4 POSTS

Okay, thank you. I will read trouble codes. What is a good trouble code reader scanner to buy to have in the tool box?

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Sunday, January 19th, 2020 AT 4:33 PM

ASEMASTER6371

MECHANIC
52,797 POSTS

You can get a cheap one at a parts store for under $50.00 or you can have them read it for you for free.

Roy

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Sunday, January 19th, 2020 AT 4:40 PM

2003BUICKLASABREI

MEMBER
4 POSTS

Okay, thanks. Like to have a good one in the tool box. Any recommendations?

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Sunday, January 19th, 2020 AT 5:10 PM

ASEMASTER6371

MECHANIC
52,797 POSTS

Okay, I attached 4 of them for you. They run from cheap to one that does live data including ABS. I like that one but a little price. I do not know your budget but look them over.

My favorite tool store has them in stock. Harbor Freight.

Roy

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