got a rearend problem !

well iv got the sierra1500 w/8.5 rearend .tonight i was getting into it a little really not much ,but iv got a real hard 2nd gear i hit second i heard a pop and it sent me side too side ,i slowly proceeded too my next red light and it bassically went into neutral even though i was in drive .i put it in 4 hi and drove it too my mechanics shop and left it .im assuming i BLEW MY REAREND OUT ! iv already got an eaton posi unit for it my question is which name brand gears would be the strongest for this rear unit.my mech says if you build it like a race rearend ill wipe it out in no time in the street,idk,but if you buy softer gears theylle go again probably .i just want a few opinions before i have him go ahead and order something im going too regret.any opinions would be great please im going too have too order tomm its my work truck.thanks ahead of time .

Why would he say if you build it like a race rear end, you'll wipe it out? Uh... I'd build it to withstand work as if I'd run it on a drag strip. Strenghtening it up for that surface will serve you well if all you're looking to do is run it on the street as a DD.

Go with AAM or Yukon. Yukon is a Moser gear with a different lable on it

c10 ,let me fix this ,he said if you build it tight for race appl,you would eat the gears in no time ,if you build it like street gears itll probably happen again thats why i asking for reccom,or suggetions too ask or tell him to do .i certainly dont want this too happen again ,oh i am supercharged soo i have alittle bit of ass behind it .

if you had a G80 in it, that is what blew and probably took the gears with it.

dont know what a g80 is but it was the factory3.73 rear.the mech said i could of broke the{ pin }but then i probly took out the gears after or with it.

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Originally Posted by ramsey rider

dont know what a g80 is but it was the factory3.73 rear.the mech said i could of broke the{ pin }but then i probly took out the gears after or with it.

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A G80 is the type of carrier that is found in most NBS trucks. They are prone to failure. Countless amounts of truck enthusiasts from VARIOUS different forums have been seeing these fail, especially behind more powerful than stock powertrains. Upgrade to a stronger carrier if you ever have to change out gears... unless you don't mind having to change it out whenever it goes KABOOM. I have a few friends with NBS trucks that have had them fail, and one or two (that I can think of) that replaced 'em before they went bye-bye.

As far as gears go, I'm no pro at gear installs, but just ensure that you have strong gears to hold the upgraded power and performance. Also have them adjusted to where the pinion makes even contact in the gear's grooves. If that's done within spec, you should be fine. I don't know of any special method for having a "tighter" or "looser" gear installation. Again... I'm no pro at that, but have never heard it put that way either.

"he said if you build it tight for race appl,you would eat the gears in no time ,if you build it like street gears itll probably happen again thats why i asking for reccom,or suggetions too ask or tell him to do " Find a differant Tech !!!!!!
Yep you could look like this. Carrier gears driveshaft cover yoke and joints all dead.

http://img1.putfile.com/thumb/2/4518531157.jpg

I agree with zeake. Find a different shop all together. A couple of friends of mine that had G80s look like the carrier pic that zeake posted. I'm guessing this guy told you with regards to installing the ring gear closer to the pinion vs far away. If he "knows" what he's doing, he knows how to install gears correctly, and it won't matter how you run your vehicle. ;)

swap in a 9.5" axle. you could get one used that has a 6 lug pattern for about the same price as a gear swap, if you do it yourself.

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Originally Posted by ramsey rider

well iv got the sierra1500 w/8.5 rearend .tonight i was getting into it a little really not much ,but iv got a real hard 2nd gear i hit second i heard a pop and it sent me side too side ,i slowly proceeded too my next red light and it bassically went into neutral even though i was in drive .i put it in 4 hi and drove it too my mechanics shop and left it .im assuming i BLEW MY REAREND OUT ! iv already got an eaton posi unit for it my question is which name brand gears would be the strongest for this rear unit.my mech says if you build it like a race rearend ill wipe it out in no time in the street,idk,but if you buy softer gears theylle go again probably .i just want a few opinions before i have him go ahead and order something im going too regret.any opinions would be great please im going too have too order tomm its my work truck.thanks ahead of time .

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You state you drove it home...most times, you will not be able to because the gears bind up and make a meat grinder out of the pumpkin...If this guy knew how to install gears, he would not have stated it to you this way. When you install gears, you get the pinion depth correct, as well as the side to side measurements/with shims which insures a good wear pattern on the gears. Racing or street, you don't set them up tight or loose.
Again, if you drove it...it may be something else unless we aren't getting the whole story. I'd either tear it down myself and take a look (rear-end covers arent difficult to remove/reseal/reinstall) or take it to another shop, this guy wants to sell you 'sets' of gears...
Just my .02

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Originally Posted by gr8apmech

You state you drove it home...most times, you will not be able to because the gears bind up and make a meat grinder out of the pumpkin...If this guy knew how to install gears, he would not have stated it to you this way. When you install gears, you get the pinion depth correct, as well as the side to side measurements/with shims which insures a good wear pattern on the gears. Racing or street, you don't set them up tight or loose.
Again, if you drove it...it may be something else unless we aren't getting the whole story. I'd either tear it down myself and take a look (rear-end covers arent difficult to remove/reseal/reinstall) or take it to another shop, this guy wants to sell you 'sets' of gears...
Just my .02

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he was right about gears the spiders were shredded,this guy builds 8 second funny cars and lower ,idk what he meant but maybe ,well i know were alittle out of his legue w these computer cars ,the ring and pinion were a little chipped up but that whole unit was shredded.replaced w 3.73 s and eaton posi unit hope it last alittle better.thanks for all opinions .

Eaton Posi,Yukon Duragrip,Eaton Truetrac with a good set of gears will cure the problem.
I changed mine before it went BOOM!!!!