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Sierra Pinion Splines
https://auszookers.com/forum/viewtopic.php?f=5&t=27164
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Author:  SierraDan [ Thu Oct 27, 2011 7:53 am ]
Post subject:  Sierra Pinion Splines

I recently put 3.9 NT centres into my diffs, and came across some differences that some people werent aware of when i told them.

One WT flange i had went onto the NT 3.9 pinion without a fuss.
And all others i had including the ones from my original 3.7 centres wouldnt go on.

The NT pinions and flanges had more of a triangle shaped spline.
and the WT flanges that wouldnt go on had more of a square shaped spline.

So does anybody know what WT models have the triangular spline and which ones have the squared ones?

Author:  want33s [ Thu Oct 27, 2011 8:37 am ]
Post subject:  Re: Sierra Pinion Splines

No idea which is which but I have had a few WT flanges that were a real bitch to fit to NT pinions.

Author:  christover1 [ Thu Oct 27, 2011 9:21 am ]
Post subject:  Re: Sierra Pinion Splines

I have the yoke? that came with my 4:3 steel gv front, it won't fit anything I got. I kept it in case purchaser of the 4:3 suddenly found they may need it.

Author:  SierraDan [ Thu Oct 27, 2011 10:22 am ]
Post subject:  Re: Sierra Pinion Splines

Yeah I thought they were just a real bitch to get on, but mnemonic noticed when he was helping me figure it out that the splines have the same count just a different shape.

I was thinking the one that worked may have been a 88.5 one. NT spline but WT bolt pattern?

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