So i opened my diff up the other day...
12-20-2009, 07:18 PM
#1
4th Gear Member
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Join Date: Sep 2006
Location: Contentment
Posts: 1,033
So i opened my diff up the other day...
I have been hearing this grinding coming from my rear end for awhile now, but only well i am deccelerating. It has been going on for about 6 months, it has been almost a couple years since i had evolution motorsports install them for me. I have maybe driven it for 3 of those 6 months. So i worked it out with my buddy who is a master machinic at chevy to look at the rear end and do a full rebuild and just reset the gears and i would learn how to do it too. So i take it to his house a day before we got the big snow storm out here.
So to make this a shorter story, we opened the diff and he found the the ring gear bolts were coming out, all of them. Not one was tight at all he could loosen them with his hand and we couldn't see any lock tight on them. How you see the bolts in the pics is how they were when we open the diff up.
The bolts are destroy, the pinion has chips missing out of it on the very very end of it. The ring gear has marks on it. The fill plug has metal shaving all over it. Oh and a bolt was laying on the bottom of the diff. You can see alittle of it in the pics. So we didn't rebuild it of course we clean the hell out of the rear and used the new ring bolts and tighten them down with lock tight and 80lbs of torque.
I have 4:10's but now since i need new gears i am going with 3:73's. I will drive it for a couple weeks till i get time to ripped the rear out and take it up to him.
I didn't get to drive the car yet since it snowed 18 inches. So tomorrow i will take it for a ride. I sure it is going to make noise, but i can live with that, it is better then doing 80 down the road and freezing up the rear and dying.
But the day wasn't a total lost, i still installed my steeda sway bars and bumbsteer kit.
So to make this a shorter story, we opened the diff and he found the the ring gear bolts were coming out, all of them. Not one was tight at all he could loosen them with his hand and we couldn't see any lock tight on them. How you see the bolts in the pics is how they were when we open the diff up.
The bolts are destroy, the pinion has chips missing out of it on the very very end of it. The ring gear has marks on it. The fill plug has metal shaving all over it. Oh and a bolt was laying on the bottom of the diff. You can see alittle of it in the pics. So we didn't rebuild it of course we clean the hell out of the rear and used the new ring bolts and tighten them down with lock tight and 80lbs of torque.
I have 4:10's but now since i need new gears i am going with 3:73's. I will drive it for a couple weeks till i get time to ripped the rear out and take it up to him.
I didn't get to drive the car yet since it snowed 18 inches. So tomorrow i will take it for a ride. I sure it is going to make noise, but i can live with that, it is better then doing 80 down the road and freezing up the rear and dying.
But the day wasn't a total lost, i still installed my steeda sway bars and bumbsteer kit.
12-20-2009, 07:44 PM
#3
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Join Date: Sep 2006
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I'm going to 3:73's cuz my trap speed is 110mph and i am well above red line w/ the 4:10's (maybe almost a grand), so going with the 3:73's will bring the rpms down when i go though the traps in 4th.
12-21-2009, 02:39 AM
#9
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Location: Tulsa, OK
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12-21-2009, 05:43 AM
#10
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Join Date: Jan 2005
Location: Port Monmouth, New Jersey
Posts: 1,984
same thing happened to me with a local shop but it happened about a year and a half later. I heard a big bang and stop. ended up replacing the entire rear end out a wrecked cobra for 200 bucks