After cruising with my new stroker engine for about 1 month 1/2 for about 1000 miles, I started to hear a strange noise coming from my rear end... it was like a little bird singing a warning song to me LoL I already had a little noisy sound coming from my gear even when rebuilted with a Motive gear. But now, I could hear this new strange noise since thursday.

I didn't drive the car until this afternoon, and after couple miles, I was going for a kickdown and then POW! This hard noisy roller coaster noise was coming from my rear end (I think) The tranny engaged in every speed without any problem, but as soon as I move the car forward on any gear, there is this very loud roller coaster noise and trust me, it's SCARY!!! The towing brought the car back in front of my house, and he couldn't pull it backward with his chain? It was kind of stocked there...I started the car and back it up very slowly and my hearth was beatting fast every time I could hear this loud sound again and again!

My rear end felt me already 2 or 3 times if I am not mistaken. Now with all the investments in rebuilding them, I could afford a brand new Currie or Moser 9 inch instead.

Looks like this car is going back for sleep until next spring again

What you guys think it could be exactly in this rear end that is broken?

All thanks for your help for a desperate third gen tired brother

 

You need to properly shim the ring and pinion .
If it is making noise after you rebuild it- its not right. Coast or accel- it should be quiet. Check your spider gears as well. If your rear is posi- add posi additive. Good luck bro

 

Yeah I had it redone in a pro shop specialised in F-body and they said that aftermarket ring gear set can be noisy sometimes...My previous SLP gear set and of course original GM gear were not noisy at all! But any Richmond and this Motive gear now that it's made in China instead of Italy is noisy as hell? Even with proper shims and everything...The speed shop also put me some Ford rear end special oil and additive for posi like they put in Mustangs, he says it's better than any GM oil or supplement.

I have moser axles with moser bearings but I now had a rebuilt Auburn from a 02 Camaro. Could it be it or the gear itself?? I have no clue, I will need to open it to actually see it, but from the sound described, I tought maybe someone had the same proble and went threw this process before.

Thanks

 

I used motive and mine is quiet

 

maybe you see why everyone always says "don't rebuild your stock rear-end" ?

Do it right this time and build a 9" and be done with it already.. if you've blown it up like that - you're only wasting money at this point.. especially behind a 383. That's asking for a broken rear.

 

I know that Motive is supposed to be quiet, but apparently, their newer gears set are now made in China and uses cheapier cast material than before...Is it true or false? I don't know just relating what I was told by my local rear end shop and a Gm technician.

And as for a 9 inch: Well for sure I think I will go that route but for a street car, I tought a well built stock rear end would handle it. Again, my local speed shop technician, who sells the Moser 9 inch for our car, could make some money with me and try to convince me to buy it! But instead, he says that our stock rear end with an Eaton posi, Moser axles combined with a good gear set such as yukon, could endure up to 500 Lbs torque in a street application. He says the only thing that could brake is the ring gear itself, because the Moser axles & the Eaton posi are almost bulletproof...

With that said, and without knowing what needs to be done in that rear end, I really have no clue about my final decision but again, the 9 inch route would be the ultimate decision!

For the past years, I always had diferent problems with my camaro, calling towings sounds familiar to me now... I own my car since 98 and everytime I have problems like that, I consider selling it for a newer car. I prefer our 3rd gen over the 4th one's as for the body lines, but as for the 5th gen's, they are awesome and the Vette's are really nice cars too, I am confused now

 

Not sure about that claim, but it wouldn't surprise me if it was outsourced as many things are now.

Can our rears hold in 500 HP street applications? Yeah, they can... But that's probably assuming you BARELY put your foot into the gas. I somehow haven't blown my rear up yet, but I'm anticipating it as the first thing to blow once everything is up and running again. These rears were never meant for high HP applications. Do you even have a girdle and brace for your rear? That's more important than anything else as they provide the most resistance from the housing allowing the ring/pinion to jump out of alignment and blow up all the internals.

Good gears don't mean anything if they can't stay in place to do their job. Even then - we're still met by the limitations of a 7.5 ring/pinion as far as diameter is concerned.

Buy another car? Start from scratch again. Could end up finding out your next ride is a much more expensive headache instead of just fixing what you have, and doing it correctly. With the way you've done things - you really need to just get a 9" and get it over with so you never have to worry about it again.

 

Ive been told that with hard launches/sticky tires even my 5.0 with a total differential up grade including Eaton posi and support cover would be hard pressed to survive for long. I chose it over the 9" or 12 bolt because of money and the fact its a DD,with a automatic trans. and street tires that produce a softer launch. If I had what you have I would definitely have went with a 9".If for some reason you decide to rebuild the 10 bolt than as already suggested use a support cover like this.
http://www.jegs.com/i/L.P.W./619/301-7.5G/10002/-1

 

RONUSMC and I both use this cover. I also use the brace kit that was made for it, and I highly recommend it if you decide you want to gamble again. The other covers aren't bad, but they don't have provisions for a brace like this one does... which is honestly probably the most important component with these rearends with the way they like to "push back" when under stress.

 

Zexel torsen worm drive. Stronger than spider and quiet. That is what I put in my 91 . They are cheap and you can get them off ebay. This way you can use the stock rearend.

 

I already have an "LPW" main girdle cover, but I wasn't aware of any brace for it? What is it exactly?? Is it made by LPW as well?

As for the Zexel Torsen unit, I had one in hand couple years ago and regrettbly sold it with another stock rear end ;-(
As for the unit on Ebay, they are all used...I know they can be rebuilted if I am not mistaken but I tought an Eaton unit was as much bulletproof.

Warm weather is ending soon here in Montreal, Canada, usually I put the car for winter storage by the end of october. But now I have only driven the car for about 1 month 1/2 and didn't even got the chance to dynoed my new stroker/combination engine

In addition, I see all my friends driving their newer sport cars such as Challenger, Shelby GT500, G8, Mustangs etc. I am the only Fbody'ers and the only one who's got an almost antique car. For sure, all their cars are head turner and they are proud of their rides. But my car always get more attention due to the fact that it's a 90's car and clean as their's! This is one of the main reason that I still hold on my Camaro.

I already put around 30K during the past 12 years in upgrades such as multiples engine combinations, rebuilted tranny & rear end as well as suspension, interior, paint etc etc. (you know what I am talking about)
So I can't stand selling my sweethearth LoL

I will keep you updated with my final decision, but at this time of the year, money is a factor and I am afraid that I will probably go for the "fragile" stock rear...

All thanks for your suggestion

 

Its the ring or pinion gear that breaks. Doesn't matter what diff your using, it won't make these gears stronger. If you want to get the car rolling again to drive it, I'd honestly just put a junk yard rear under it and then drive it easy while you save for a 9" or a 12 bolt. I wouldn't keep wasting money building an axle you know you'll break.

 

Yes, LPW makes the brace for it. Go to their website and call them.. you'll save some change buying from them directly.

 

Ok thanks, I will look up for that! I was looking at all stronger unit and there are not too much choices. The currie, the Moser, or a 8.5 GM with 12 bolts...I came accross a used Dana before Christmas and pass my turn!?!?! But once in a while there are some for sale here in classified. I am really afraid to go over this rebuilding process and break the damn rear end again, so finally, I learned my lesson!