Looking for replacement.
2/79 40 square 4 bolt companion pinion flange rear differential (1 Viewer)
- Thread starter Caribou
- Start date
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Living in the Past
SILVER Star
To put some tech in to this thread you need to look for a flange off a 1/78-8/84. 1/78 is when I show the the fine spline pinion started. 8/84 is when the bolt pattern on the flange changed.
We definitely have them @ Cruiser Outfitters.
Now, the 1979 pattern is NOT square, the late 6x and later went to the square.
We have flanges for all here: Cruiser Outfitters
Flange patterns are here: Cruiser Outfitters
Now, the 1979 pattern is NOT square, the late 6x and later went to the square.
We have flanges for all here: Cruiser Outfitters
Flange patterns are here: Cruiser Outfitters
- Thread starter
- #6
My replacement 3 member came from a 78. It has a circle flange. My drive shaft does NOT line up to the holes. I could double drill the flange ( like the ones at C.O but I’d rather have the OEM square faced flange that came as original equipment
We have used rectangle OE flanges too, just need to know what pattern you in fact need. 78 and 79 would have both been the 68.5x60mm w/11mm bolt.
Living in the Past
SILVER Star
You most likely have a fine spline pinion but I would remove the nut and washers and verify for 100% it is a fine spline. I see on a diagram shows the fine spline started 7/78. Looking online I see 1/78 as the start date in multiple locations. Would just be sure you know what is on your used diff first thing.
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