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I have a 99 z71 silverado, stock gears, when i hit the gas and spin the tires, either on or off road, the rear end makes a clicking/shuttering noise that is pretty loud. Is this normal or should i start looking for a new rear end? and would changing the gear oil over to synthetic help at all? the noise doesnt sound good. thanks for the help.
Sounds like you need a rear.
the stock Diff if it has the factory locker makes a noise when the diff engages
should that noise just be one single sound or a bunch of clicks.
Sounds to me like your pin is getting ready to come throught the cover. Take the cover off and inspect it.
what should i be looking for.
Metal shavings.....check to see if the pin is secure and still in place.
If you have the G80, that noise is normal. I was scared when mine first made noise, but its just the diff locking/unlocking.
how can i find out if i have a G80. what should i look for.
Look for G80 in the glove box, in the rpo codes.