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Discussion Starter #1
I just finished dropping in a transmission that I recently rebuilt, but now that everything is back together, there's a whirring noise that increases as speed increases and slows down as you slow down. It's not a grinding noise and everything is working smoothly, gear shifts are smooth. It's almost like a buzz. And then after a few minutes, the check engine light comes on. I know something is going on with the VSS because the speedo isn't working, but what could be causing this noise and CEL to come on?
 

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Discussion Starter #2
Is it possible that I damaged one of the driveshafts when removing/replacing? That doesn't explain the CEL though. I don't know. Maybe I installed the VSS backwards or something. I was looking at the contacts on the plug and they were pretty dirty. I'll clean that, but I'm pretty sure that has nothing to do with the noise. Will a bad VSS cause a CEL? The one that was on the previous tranny was working, but occasionally the speedo would quit. It never gave a CEL though.
 
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