Unbalanced stall?
Unbalanced stall? I just put in a used 4l60e that came out of a buddies car. It ran fine b4 and no probs. I put my old converter that came out of the trans that went out. The car no vibrates like crazy. Could it be the stall?
Try unbolting spin a position then bolt the converter back up and see what happens, Did you change mounts or anything at the same time?
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i put in a new trans mount. But last time I used the stall it did the same thing. I had it it old trans, trans went out put another a4 in that was good with the same stall and it vibrated. I put a m6 in the car and did fine sold it and put this a4 setup back in and it still vibrates. I notice that the insides of the stall had alot of slack in them. dont no if they r posed to or not. I could sake it and the insides would hit the sides.
Thats why I ask about the MOUNTS I hear this alot polly mounts , energy suspension mounts, There is a good reason GM made the stock mount squishy and this is that reason.
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Oh yes I have felt them lol, but glad your all fixed 
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