Stock vs billet 5r110 input?

Bustedknuckles

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I am rebuilding a built trans and am trying to decide whether it has a billet input or not. The shaft has 4506 stamped on the end away from the converter. Google leads me to believe that it is a sonnax 300m billet input. Can anyone verify?
 

Bustedknuckles

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How many rings do you see on the serial#side?

They will be on the input stator support bearing surface on the input shaft.
None, both ends are perfectly smooth. A guy on FB said it is definitely a billet shaft and he had a picture of a stock on to compare it to. Attached is a picture of the one i have.
5c56fdb62981ae51163b88345c3c3e27.jpg
 

dohcter

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Id replace it. Looks very similar to the "billet" one that was in my trans from a known builder. It didnt last long. Repaced it with a maraging shaft from tcs
fa5dec04b47a34457427a1116568649e.jpg
 

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