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Discussion Starter #1
Any of you guys retro fitted a real rear end into your GTO? The M80 is a real POS. Both Dana and GM have told me "good luck, you're on your own" with that one.
 

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Haven't done it yet. My POS has lasted 10 years with quite a few launches and up to ~480 RWHP so far. gForce has a 9" kit but be prepared to drop $4,300 plus install on it.
 

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Discussion Starter #3
rear end

My local Gm deal said they changed a bunch of these rear ends under warranty. ie they were young and junk. and.. mine is hosed. $4300 is unreal. You can get a complete moser dana 60 with axles(mopar) for $2000
 

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Welcome to the GTO world. Back when they were new 10 years ago a lot of people complained about them whining. That was before everybody swapped out their exhaust to make the car louder.
 

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Discussion Starter #5
can i drop the differential with the rear of the car on ramps? Not sure if the axles need to rotate to disconnect.
 

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You can. You just need to unbolt the half shafts from the stubs. The bolts holding the pumpkin are on the top along with the sway bar anchor and are a bit of a pain to get at but doable.
 

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Discussion Starter #7
Why do the manuals tell you to mark the drive axles before removing from the stubs? I dont see how this could be a balancing or assembly issue.
 
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