My transmission shifts hard why?

KATIE1015

MEMBER
2007 CHEVROLET SILVERADO
6.0L
V8
4WD
AUTOMATIC
107,000 MILES

I can drive the truck and it runs fine. After twenty minutes or so when taking off the truck shifts hard into first and second and third. But I can shut the vehicle off for three to five minutes and it will no longer do it. I was told it is the torque converter but I do not feel like it is. I have replaced the filter and fluid with no change.

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
47,513 POSTS

It is not the torque converter, it sounds like you have a pressure control solenoid that has a broken spring. here is the location so you can replace it. If the transmission needs to come out. here is a video to help walk you through the steps with the instructions on how to fix the problem below:

https://youtu.be/3vJAojsrfuU

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.

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Sunday, May 26th, 2019 AT 2:14 PM

RICK SCOTT

MEMBER
1 POST
2005 CHEVROLET SILVERADO
11,300 MILES

Why is transmission shifting hard?

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Thursday, May 6th, 2021 AT 11:06 AM (Merged)

JACOBANDNICKOLAS

MECHANIC
109,706 POSTS

It could be several things. Make sure the trans fluid is clean and full. If the check engine light is on, have the computer scanned for possible trouble codes. As far as the hard shift, it could be shift solenoids, the governor.

You could have a clogged catalytic converter as well here are two guide to help us fix the problem.

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

and

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

Please run down these guides and report back.

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Thursday, May 6th, 2021 AT 11:06 AM (Merged)