Yes, but depending on how the rear locks up it could cause the same symptoms.
Say the spider pin worked out 3/4", enough to keep the spider gears on the pin, also enough to jam the pin on the pinion. In this situation the carrier would lock, yet the differential action would still work.
Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-