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Hello,
The year of the car makes a difference....
AW........
W...........
256.......Julian date of year
E.......... Positraction Source Easton
1.......... Shift
It isn’t a 1969 differential… The date system for 1969 is considerably different than what is presented here. This particular style was used on 1971 and later differentials. All we can tell by what is stamped is that the differential was assembled on the 256th day of the year. To determine WHAT year, you’ll need to look at the casting number on the differential housing… Once you know that, you can determine what model year it was originally installed in.
BB got the "HD" axles, shot-peened 1/2 shafts, posi case, and I believe the HD outer axles.
The axles were no better than the standard axles. The cap and bolts were the difference. The case hardening was the same, they wore out the same.
The 1/2 shafts still were 1350 and the joint is the weak link
The posi cases used in 68 were bad as well. Last year for the first version of the Eaton posi.
The outer axles were ok but still broke at the base of the threads with enough abuse.
Many have paid more for BB diff's thinking they were better, they were not.
BB got the "HD" axles, shot-peened 1/2 shafts, posi case, and I believe the HD outer axles.
The axles were no better than the standard axles. The cap and bolts were the difference. The case hardening was the same, they wore out the same.
The 1/2 shafts still were 1350 and the joint is the weak link
The posi cases used in 68 were bad as well. Last year for the first version of the Eaton posi.
The outer axles were ok but still broke at the base of the threads with enough abuse.
Many have paid more for BB diff's thinking they were better, they were not.
Who can decipher this differential code?
