WFarm
Full Access Member
- Joined
- Jan 11, 2023
- Posts
- 284
- Reaction score
- 1,765
- Location
- Central Virginia
- First Name
- Paul
- Truck Year
- 1975, 1987
- Truck Model
- K5 Blazer, R1500
- Engine Size
- 454, 350 tbi
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Does anybody know what “M69” cast into the differential housing indicates? This is on my 75 Blazer rear differential.
