Stock 10 Bolt

**90ARAPAJ** · 10-26-2011, 06:23 AM

I have a stock rear end with 3.73 gears in it. I hear alot about people always ruining their rear ends or blowing them etc. I have 47,000 original miles on mine. I would like to know what causes them to break, what happens when it does ( noise/feel wise) , how much it is to fix, etc. I also notice when im just cruising at like 45 that it sort of wines when i let off the gas but if i give it gas perfectly wheres its not slowing down or speeding up it doesnt make noise, but the funny thing is when its stopeed i kinda still hear it.

**Shermanator86** · 10-26-2011, 06:27 AM

LT1howto.com :: F-Body DIY Ford 9" Rear End Buildup
this article explains things pretty well i thought

**RedSuperSport** · 10-26-2011, 06:54 AM

Thank you that was extremely helpful to me also, I know the route I'm going to go

Sent from my DROIDX using Tapatalk

**35th-ANV-SS** · 10-26-2011, 06:55 AM

There is a sticky in the drive-train section of this site: http://www.ls1.com/forums/f8/when-wi...t-break-17424/

**jetaws6** · 10-26-2011, 09:50 AM

if your a auto you dont have much to worry about. If your an m6 dont put sticky tires on it.

**senicalj4579** · 10-26-2011, 10:46 AM

If you have a manual and you beat on it you should have money saved up for a 9". If your auto you dont have to worry about it "AS MUCH" as you do with a manual but you still cant count on it. Iv had 3 ls1s and the first one was totally bone stock. My rear twisted off the car from a dead stop on street tires.

**35th-ANV-SS** · 10-26-2011, 11:18 AM

A used 10 bolt can be found anywhere from $200-$450 to answer your replacement cost question.

Not too many people ever suggest putting money into the 10-bolt.

**90ARAPAJ** · 10-26-2011, 01:53 PM

Ok, well i have an auto so i guess i feel a little relieved. Why does the manuals have that much more load on them?

**justinmc978** · 10-26-2011, 01:56 PM

Originally Posted by 90ARAPAJ

I have a stock rear end with 3.73 gears in it. I hear alot about people always ruining their rear ends or blowing them etc. I have 47,000 original miles on mine. I would like to know what causes them to break, what happens when it does ( noise/feel wise) , how much it is to fix, etc. I also notice when im just cruising at like 45 that it sort of wines when i let off the gas but if i give it gas perfectly wheres its not slowing down or speeding up it doesnt make noise, but the funny thing is when its stopeed i kinda still hear it.

then it's obviously not your rear end.

**90ARAPAJ** · 10-26-2011, 02:01 PM

Originally Posted by justinmc978

then it's obviously not your rear end.

well yea but i thought you guys could point that out while your at it..

**godless-phoenix** · 10-26-2011, 04:25 PM

get a mac or t/a "rear end girdle" they're like around $150. after i had my 10 bolt rebuilt, ive had no problems with it since then after putting on the "girdle". seems to hold up well especially since i have an auto just like you. hope this helps...

**az gt eater** · 10-26-2011, 05:20 PM

How much horsepower are you putting to it?

**35th-ANV-SS** · 10-26-2011, 07:30 PM

Some here are running 10's without an issue with the 10 bolt. Others have gone through numerous 10 bolts with stock power; both manuals and auto's.

However you look at it, the 10 bolt is a ticking time bomb waiting to go off. Manuals create more "shock" into the rear differential and that is why the rear end usually breaks on a M6 before an auto.

**justinmc978** · 10-26-2011, 07:31 PM

Originally Posted by az gt eater

How much horsepower are you putting to it?

the car is basically stock with a 100 shot of n2o

**jetaws6** · 10-28-2011, 05:06 AM

Originally Posted by 90ARAPAJ

Ok, well i have an auto so i guess i feel a little relieved. Why does the manuals have that much more load on them?

More harsh on the drivetrain between shifts.

**Knight** · 10-28-2011, 05:53 AM

If you're stopped, and still hear noise, it would be something related to the engine or tranny. Could be many things, Would need more info to help diagnose.

As for the symptoms of a rear end dying, normally it's fairly obvious. As Jon stated, it's only a matter of time. A 9" or 12 bolt is the most common solution. I run a 9", as I kept tearing teeth off the ring and pinion gears on the stock 10 bolt.

**TLS_Addict** · 10-28-2011, 06:24 AM

If I keep my car my 10-bolt is going in the for sale section.

**Lunatikgixxer** · 10-28-2011, 09:01 AM

The reason the 10 bolts are no good is because they usually twist when under a load with sticky tires on them correct?? They dont actually break do they?

**Lunatikgixxer** · 10-28-2011, 09:03 AM

Originally Posted by 90ARAPAJ

Ok, well i have an auto so i guess i feel a little relieved. Why does the manuals have that much more load on them?

They mainly break on launches at the track with sticky tires, or on the street im assuming... I knew a guy who blew his out when he downshifted to 2nd gear and mashed on it going about 60... but he was putting out over 450 wheel

**wileyCoyote** · 10-28-2011, 08:49 PM

stock 10-bolt also a notorious "leaker"...

...as the others said the M6 tends to be harder on it, i suppose by virtue of engage/disengage the clutch clycles, but i try and go easy w/ the clutch, to minimize the "shock" and "clunk"