Question about 1983 Chevrolet Silverado

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I have an 83 silverado short bed and im about to pull the tranny out to get it rebuilt and the rear main seal may be leaking as i put oil in and it leaks out pretty fast. my tranny is covered in oil and so is the oil pan. i recently replaced the intake and distributor and thats when i noticed it. Iwas wondering how to replace the seal as im going to pull the tranny and redo the intake with better gaskets and sealant

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I'm fairly certain that your engine does not have a full circle external main seal (if when you remove the trans and flywheel you find the rear crank flange is bolted to the crank and not part of the crank, then I'm wrong) If it's not an external seal, it is two piece, located in the rear of the main bearing cap. That makes it necessary to remove the engine oil pan and the rear bearing. Before contemplating doing anything with that, make very sure that the leak is not from the intake or valve covers first. Otherwise you'd be doing ton of work for no reason. Wipe everything down and look carefully. If it's leaking fast it shouldn't be difficult to see.

Posted on Mar 14, 2011

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1 Answer

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