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#1
07-05-2005, 03:34 PM
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Rear end noise
I have a 1998 Firebird Formula LT1. For the past year my Posi rearend makes a rubbing sound that is very annoying. Car runs perfect. Anyone have any ideas what is wrong with the rearend that could cause a continuos rubbing sound? Of course at high speen noise is negligible but in traffic noise is a lound rubbing noise. Any help would be highly appreciated.
Thanks Vic Liotta 
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#2
07-05-2005, 05:22 PM
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First I would check to see if something is making contact with the drive shaft.
Next i would check for a bad u-joint. If the noise happens all the time, may be a bearing..if it makes more noise on accel than decell or vice versa it could be the gearset.
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#3
07-05-2005, 05:32 PM
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Re: Rear end noise
First , there is no such thing as a 98 Firebird LT1 unless you had it put in custom. Otherwise you have either a LS1 or a 3.8 and are you sure its not from a sticking emergency brake cable/caliper or it could just be old rear end fluid were the posi additive broke down or a bad differential bearing or any of the things merlin mentioned.
BTW- Welcome back Merlin.
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#4
10-06-2006, 11:00 AM
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Re: Rear end noise
Quote:
Guess I was wrong about the LTI..I thought the detuned 350/305hp was the corvette aluminum engine. I had it to a mechanic and he wasnt sure what it was. Can the rear end posi gear box be replaced? Thanks for your response Vic
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