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does the suge seem to be the engine?or..the way the transmission shifts
Hello, My name is XXXXX XXXXX I will try my best to help you with your vehicle issue.
There are a couple of things that we can try to determine quickly where the problem might lie.
If these don't work, we might have to get a little more "In Depth"
1. Unplug the alternator to see if that is causing the problem. (Secure the wires so they do not "arc") If you can safely do this while the vehicle is running - that's fine - BE SAFE & SURE!!!
Do not drive the vehicle far - it is running off the battery
This can also produce the high pitch whine you are hearing 2. Unplug the transmission Output Shaft Speed (OSS) sensor and drive the vehicle. The transmission will not upshift, it will be stuck in second gear and that would be normal. The speedometer should not work at all. If the problem is gone with the OSS sensor disconnected, then replace the OSS sensor. 3. If the problem is still present, check the output shaft RPM on the scan tool to see if there is a signal coming into the Transmission Control Module (TCM) from something else, like a wire harness problem.
Just checking in to see if my information helped you.
Have a great weekend,