47 to 48re nss conversion

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Downtownbrown

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Sep 21, 2017
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Does anyone know the thread and drill size for the nss adapter so i can bore this 47re case to accept the 48re neutral safety switch?

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Downtownbrown said:
I guess i may try tapping a 1/2npt into something and see how it threads... unless someone else chimes in and knows.


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Just go buy a pipe fitting. I am 99% sure it is just an NPT, as I built a complete 48RE(case and all) put it in a 1997, I just changed the VB and put in the bushing for the neutral safety switch. I would be cautious about drilling into the case, it is a weird angle and I am guessing the new PRNDL switch is pretty particular how it interfaces with the rooster comb on the VB.
 
You should really drill it with a jig otherwise the case is ruined.
 
1/2npt is too small, i dont have a 3/4 npt on hand but just from od measurement 3/4npt looks to be too big.


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Found a post on an older forum, 3/4 npt is the correct size. Thanks zstroken.


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