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Old 04-25-2012, 05:55 PM
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DH 10 30 G

Probably:
DH = 1965-1969 Posi 3.31:1 (15/16000 H.D. series)
(note that below the DH code is a D or E code (Dana or Eaton posi unit)
10 30 = October 30
G = Detroit Gear and Axle (plant)

Bolt dia=3/8
Ring Gear dia=8.875
Pinion dia=1.625
Axle splines=30
Axle tube flange to axle tube flange=58 1/4
Between centerlines of control arm brackets=43 1/8
Axke shaft length=31 15/32

Possibly:
DH = 1975 Monza 2.56:1
10 30 = October 30
(problem is after 1970 they used day of the year ex: Jan 30=030)
G = Detroit Gear and Axle (plant)
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