LT1-LT4 Modifications 1993-97 Gen II Small Block V8

possibly broke rear end

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Old Nov 7, 2006 | 08:18 PM
  #1  
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Default possibly broke rear end

i turned right and punched tires spun and then hooked and i heard a loud pop now when i take turns from a stop or go up a hill it makes a loud clunking noise from the back but it does not do it when i go in a straghit line or when i take turns with some speed what could this be i am stumped
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Old Nov 7, 2006 | 08:31 PM
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Best to pull the cover off and inspect the diff. Probably broke a spider but if you do not check it now you risk destroying the ring and pinion also
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Old Nov 7, 2006 | 09:19 PM
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i had something similar but mine would also lock up at high rpms. took the cover off and everything looked fine. after a week it got real bad, was locking up around 2500 rpms and clunking at idle, so i took the cover off again. one of the metal pieces that hold the springs in the posi unit had cracked and was about to shear off. i assume thats what was causing the problem as there were no signs of wear on the ring, pinion, or side gears.
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Old Nov 7, 2006 | 09:35 PM
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another 10 bolt goes in the grave.
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Old Nov 8, 2006 | 12:14 AM
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it sounds like the posi unit i was just not sure should i replace the whole unit or just the whole rearend
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Old Nov 8, 2006 | 12:22 AM
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Sounds like the posi's gone. Mine did the same thing, but mine was the spider gears...
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Old Nov 8, 2006 | 12:48 AM
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what makes this even worse is it happened after a mustang dude was staring at me and i floored it out of a parking lot and pop ****** 10 bolt
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Old Nov 8, 2006 | 12:50 AM
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Damn Mustangs!!!
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Old Nov 8, 2006 | 08:55 PM
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go ahead and upgrade the rear, unless its cost prohibitive at the moment. even if you replace the posi unit and it runs smooth again that is still a puny gear set. i bought a 9" from scott@dls for under 2 grand a couple months ago. considering you will probably drop well over a grand to have your 10 bolt rebuilt, assuming you dont do it yourself, not a huge price difference.
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Old Nov 8, 2006 | 10:30 PM
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will a posi unit from a ls1 bolt in. if it wont can you change everything out from a ls1 into a lt1 housing. if so i have you coverd jay pbj has one sitting up there for us.
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Old Nov 9, 2006 | 06:22 AM
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sounds to me that you like to beat the crap out of the rear......
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Old Nov 9, 2006 | 11:58 AM
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Originally Posted by cyamaha2007
will a posi unit from a ls1 bolt in. if it wont can you change everything out from a ls1 into a lt1 housing. if so i have you coverd jay pbj has one sitting up there for us.
yes it will, same rear
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Old Nov 9, 2006 | 04:18 PM
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sounds to me that you like to beat the crap out of the rear......
no he is a friend of mine and he doesnt really run his car hard at all
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Old Nov 9, 2006 | 06:13 PM
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I agree dont rebuild the 10 bolt. Get peace of mind so you dont have to worry, and can use slicks.
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Old Nov 10, 2006 | 07:06 PM
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I killed my factory one.. that was a long time ago. And it did the same thing..pop.
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Old Nov 10, 2006 | 07:42 PM
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When mine went the first time (after a 2-3 powershift) it just made a loud humming noise, but the posi was also clinking and clanking whenever I turned--it was just out of oil. Try putting some more oil and stuff in there first.
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Old Nov 10, 2006 | 09:08 PM
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Originally Posted by Mens Rea
When mine went the first time (after a 2-3 powershift) it just made a loud humming noise, but the posi was also clinking and clanking whenever I turned--it was just out of oil. Try putting some more oil and stuff in there first.
could at least pull the cover and look at it. Jack up the rear of the car so that you can turn the wheels by hand (obviously parking brake off and unbolt drive shaft from yoke) and have a buddy or two help you turn the wheels and see whats making the noises. Probably is one of those spider gears for our differential (think its called a torsion differential = not a true posi). Allows the posi aspect to sort of unlock when your not moving in a straight line. (or am I totally wrong about this??? - anyone??)

Never a better time and excuse to get a new beefy rear and forget about the 10 bolt

Last edited by hyperzone; Nov 10, 2006 at 09:14 PM.
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Old Nov 10, 2006 | 10:09 PM
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i took the cover off and the gears in side the differential are all grinded down it had plenty of oil in it because that **** stinks and i really dont have the money to buy a 12 bolt or 9 inch i need to get it back on the road it is my dd
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Old Nov 10, 2006 | 11:27 PM
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That's what they do when they go. That would be the nice smell of Gear Oil with the Posi Additive..
Look around, depends on how much you want to spend. I got an Auburn Pro Series with the Shim and Bearing Kit for $503.
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Old Nov 11, 2006 | 12:02 AM
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just put the spool in jay oh and is it bad to just weld up the spider gears
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