Noisy Rear Differential in '72 4.5
The rear dif in my '72 has become noticeably noisier over the last couple of years. I've changed the fluid (most recently to a heavy 140W gear oil from Red Line (their recommendation)) and its still loud. (It makes a werring noise).
Can this dif be rebuilt or does it have to be replaced with a (hopefully) good used unit? Any help/advice is greatly appreciated. Thanks.
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