Re: Torque converter causing vibration
In another thread, I was talking about the various noises I can hear coming from the truck when it is running. I wrote:
"The only noises from the motor are at first start up there is an unusual noise. Not a knock or a banging. I'm not sure how to describe it though. I have found the noise described as piston slap in several threads. It goes away rather quickly once the motor starts to warm up. Once warm, the only noise I hear is a slight lifter tick as far as I can tell and of course the injectors. No noises that others have reported along the lines of a bent rod. I had rod knock with the last vehicle I had and there is nothing remotely going on that resembled that noise. "
And I wrote this:
"I just got out from under the truck while it was running. That piston slap noise and a noticeable tick both seem to be coming from the torque converter or the transmission itself up by the pump."
Well, I unbolted the TQ again and started the motor. That piston slap noise is gone. I can still hear a tapping of sorts from the back of the motor....still sounds like lifter noise but I don't really know.
That motor sure doesn't like the change of not having the converter on. Once the motor got with the program I reved it some. I could feel a vibration, though much much slighter, at 1500. It mainly only shook the steering wheel a little. The vibration up at 4K seemed to be gone as far as I can tell.
Do I have probably cause to go through the job of replacing the converter? Or is there more testing to do before making that commitment?
Every component of the ignition is new. I arrive at no other explanation than a mechanical imbalance.......that only shows itself at 4K and a little bit at 1500 if the two are the same issue. I've never had an issue like this.