Dana 300 pattern-need quick

Jeepasaurusrex · Jun 25, 2010

Dana 300 pattern-need quick (Home grown clocking)

I know the Dana 300 bolt pattern is 6 bolts, but on what radius? Does anyone know right off hand? Need this quick! Thanks! :beer:

Mrblue · Jun 25, 2010

Jeepasaurusrex said:
I know the Dana 300 bolt pattern is 6 bolts, but on what radius? Does anyone know right off hand? Need this quick! Thanks! :beer:

It is 6 3/4" diameter across my clocking ring, so 3 3/8" radius.:awesomework:

Bunk1 · Jun 25, 2010

Mrblue said:
It is 6 3/4" diameter across my clocking ring, so 3 1/8" radius.:awesomework:

Wouldnt that be a 3 3/8ths radius?:fawkdancesmiley:

Jeepasaurusrex · Jun 25, 2010

That's to the center of the holes? :corn:

Mrblue · Jun 25, 2010

Bunk said:
Wouldnt that be a 3 3/8ths radius?:fawkdancesmiley:

Yes! 3 3/8" radius ctc:redneck:

Freeride · Jun 25, 2010

The 6 holes are not evenly spaced. Yes it's a round pattern, but it's not 6 holes every 60 degrees.

JAWS · Jun 28, 2010

Get a gasket. Cheap and easy:awesomework:

TreeClimber · Jun 28, 2010

Freeride said:
The 6 holes are not evenly spaced. Yes it's a round pattern, but it's not 6 holes every 60 degrees.

Are you sure?

Jeepasaurusrex · Jun 29, 2010

What I ended up doing, was using the CNC program on our burn table to create a disc with 12 holes in it, on a 6.75" radius. I skipped 3 holes on one side. I bolted the disc up to the adapter on the transmission.

I used the blank area where I skipped the holes, and marked the odd hole location there (marked in white). I drilled that hole location in the disc. I then rotated the disc counter-clockwise to the next hole. I bolted it in place then I used a transfer punch to mark all the hole locations.

I kept the disc bolted up and drilled all the new mounting holes. I am going to have to trim a little off the shifter ears of the T-case and possibly one corner of the transmission case. Overall, it's going smooth. :redneck: