differential problems? HELP - Pontiac GTO Forum
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post #1 of 7 (permalink) Old 04-10-2014, 09:14 PM Thread Starter
 
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differential problems? HELP

Hey guys so i have a 04 gto and my diff started making a noise. It sounds like something is thumping and rolling around in my trunk. Does anyone have any ideas or suggestions because this noise is driving me crazy. I have researched and researched i have heard driveshaft but i took it out and rolled the car no more then maybe 4mph and still does it. So its clear its something in the rear end. Any information or possible solutions would help. Thanks everyone!
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post #2 of 7 (permalink) Old 04-25-2014, 04:38 PM
 
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Change your diff fluid 2 qts Torco RGO & almost 2 ounces or 1/2 a bottle of Torco type F friction modifier .GM friction modifier is the WRONG stuff for our Dana make diffs... sounds like your fluid is severly degraded & lost viscocity , making the LSD a knocking noise noise.... $35 +/- repair ! try this 1st b4 worrying I have 12k miles on my 05 goat & was sick when that noise , (same as you describe) started happeneing fresh fluid & quiet as a church mouse... you can get torco cheap off of amazon.com
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post #3 of 7 (permalink) Old 04-30-2014, 02:39 PM Thread Starter
 
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hey thank you bro i will try that and see what happens. hopefully that will solve it even if its for a while. whats the best stuff for our transmissions?
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post #4 of 7 (permalink) Old 04-30-2014, 05:48 PM
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Trans Dex III. It doesn't sound like fluid is your issue. The most likely are bad diff, driveshaft guibo or center carrier bearing

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post #5 of 7 (permalink) Old 05-01-2014, 08:03 PM Thread Starter
 
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i have taken the ds out and rolled it and it still does it so im sure its not the ds. i have heard and read that it could be an axle. what would be the best replacement for the diff? or where could i get one?
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post #6 of 7 (permalink) Old 05-01-2014, 08:50 PM
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Cleveland Pick-A-Part for used or gForce Engineering for new or rebuild

2004 Blk/Rd M6
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post #7 of 7 (permalink) Old 05-04-2014, 02:03 AM Thread Starter
 
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Any good forums on setting backlash on the diff ?
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