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Post by Pontiac1976 on Apr 10, 2005 16:08:11 GMT -5
Hello there . Has any one put a 77 1/2 ton diff with the 3/4 sup. On a 84 light duty 1/2 truck . I know GM does not say it fits or not . The truck has a Flat bed so wheel wells don't matter. 77 axles at springs are about 1/2" longer then the 84 diff . So any one put smiler diff in a 84-87 will it bolt in or will the springs not let it work ?. 77 works well all seals done better springs ( new )7+1helpers . 84 smaller diff only 3 springs seals leak . Starting to clean frame switching 84 frame to a 77 style truck . thx for any info to this post Pontiac1976
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