Quote:
Originally Posted by Arl37
I have a 69 C10 with the factory 3:07 Ring Gear and Pinion in it. I is my understanding because I have the factory 3:07 it means means I have a 3 series case.
I am going to upgrade to a 3:78. I have purchased a 3:78 R & P from Summit which will fit my 3 series case.
I have now decided I would like to add a POSI. In looking at Summit and Jeggs I seem to get conflicting info as to whether a POSI is available for the 3 series case.
Does anyone have any thoughts on a POSI that would fit 3 series case with the 3:78 gear?
Also, is any modification required to the diff to make the POSI fit?.
Thanks
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Drive Train Specialists has the 'case' you need:
http://www.drivetrainspecialists.com...ed19587-1.html
This is an Eaton series 3 carrier for an 8.875 in truck 12 bolt diff.