Question about 1989 GMC Sierra
Its not hard to do you need a gasket and seal kit too the hardest part is seperating the case halves . do not place a screwdriver in the case halves to seperate you will cause a leak ! remove the nuts on the yokes first then the case . mark with a scribed line and remove the trans speedo cable assembly set it aside tap and pry the case halves apart pull off the back half of case the front half is where you want everything to stay in place try to keep it standing up so rear case is up then you can lift up the front output shaft the chain and the planetary remove the rest of parts install new seals and reassemble the case uses rtv black sealant instead of gasket
Posted on Aug 04, 2010
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Posted on Jan 02, 2017
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