Transmission not shifting properly?

2012 CHEVROLET CRUZE
80,000 MILES • 1.4L
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ADAM WHITAKER
  • MEMBER
  • 1 POST
The car was purchased needing repairs. After an engine swap, the car drives good at cruise speed in high gear, but the automatic transmission does not shift through the gears properly. The fluid level is good and the TCM fuse is good.
Dec 4, 2023 at 7:32 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Hi,

What is happening? Does it feel like it is starting in the wrong gear or is it just not shifting?

Also, you should scan the can-bus to see if there are any codes related to the issue. CAN stands for controller area network. Basically, the different modules are tied together via a few wires. This type of scan will retrieve codes regardless of the module storing them.

Here is a link showing how it's done:

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Let me know if you have already done this or if you could have it done.

Take care,

Joe

Dec 4, 2023 at 8:40 PM
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