Hi guys, I had a lead fuel chode so I replaced the upstream O2 sensor on my 2000 4.0 Ranger. I changed the oil at the same time in case that matters. Now my truck seems to be having power issues. It seems to be shifting hard and has no power in drive. It seems to shutter when I press the gas. It does, however, have power in reverse. I had planned on replacing the downstream O2 sensor as well but I didn't get around to it yet.

Anyone experience anything like this before? I can't see how an O2 sensor could cause transmission issues.

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