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11-18-2008, 03:50 PM
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#1 | | Registered User
Join Date: Jul 2008 Location: Massachusetts
Posts: 28
|  Rear Ends.
I have a 2001 LS1 and i am looking to change my rear end to handle more power. I plan on stroking my stock ls1 to a 383 with an eagle rotating assembly. Texas speed ls6 heads and a bigger cam. What rear ends should i look into. Also which sizes and gear ratios are best? I want the rear end to handle well over 500 rwhp just to be safe. | 
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11-18-2008, 03:53 PM
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#2 | | 12 Second Club
Join Date: Dec 2004 Location: Cooper City, FL
Posts: 886
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Quote:
Originally Posted by Leandres629  I have a 2001 LS1 and i am looking to change my rear end to handle more power. I plan on stroking my stock ls1 to a 383 with an eagle rotating assembly. Texas speed ls6 heads and a bigger cam. What rear ends should i look into. Also which sizes and gear ratios are best? I want the rear end to handle well over 500 rwhp just to be safe. | talk to eric @ midwest chassis for a fab 9. gears depend on tire size, max rpm's, etc.
you'd be better served to look in the "gears and axles" forum.
Chad
__________________ Engine: heads/cam dart/torquerV2 stock bottom end HS rockers, ls6 intake Drivetrain: M6(soon to be A3) Moser 9 inch, strange pro case 4.11's Suspension: UMI LCA's/SFC's/PHB QA1's, midwest Chassis torque arm !front swaybar  | |
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11-18-2008, 03:53 PM
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#3 | | Registered User
Join Date: Jul 2008 Location: Massachusetts
Posts: 28
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I have the stock 3.42 with posi on my car. I believe all m6's came with the 3.42. But i hear that they are not too strong and tend to break once you keep adding power to the motor. I was also told that they are basically the same rear end as an s-10 pickup. | |
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11-18-2008, 03:58 PM
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#4 | | 12 Second Club
Join Date: Dec 2004 Location: Cooper City, FL
Posts: 886
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Quote:
Originally Posted by Leandres629 I have the stock 3.42 with posi on my car. I believe all m6's came with the 3.42. But i hear that they are not too strong and tend to break once you keep adding power to the motor. I was also told that they are basically the same rear end as an s-10 pickup. | yes, I'm aware, the 10 bolt won't hold up to any type of launching especially in a 6 speed variety. talk to bob @ EPP>>>>>>>> or Eric @ midwest chassis. very common swap.
Chad
__________________ Engine: heads/cam dart/torquerV2 stock bottom end HS rockers, ls6 intake Drivetrain: M6(soon to be A3) Moser 9 inch, strange pro case 4.11's Suspension: UMI LCA's/SFC's/PHB QA1's, midwest Chassis torque arm !front swaybar | |
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11-18-2008, 04:25 PM
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#5 | | LS1TECH Sponsor
Join Date: Apr 2008 Location: Tampa FL
Posts: 839
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Quote:
Originally Posted by Leandres629 I have a 2001 LS1 and i am looking to change my rear end to handle more power. I plan on stroking my stock ls1 to a 383 with an eagle rotating assembly. Texas speed ls6 heads and a bigger cam. What rear ends should i look into. Also which sizes and gear ratios are best? I want the rear end to handle well over 500 rwhp just to be safe. | We are also a distributor for moser and strange rearends. We are very competitive on pricing. Here is a link to our site if you have any questions please give me a call. http://www.bmrfabrication.com/F4.htm | 
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11-18-2008, 05:52 PM
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#6 | | TECH Fanatic
Join Date: Apr 2008 Location: Clemson SC
Posts: 1,039
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ok, sounds like you dont know much about this, except that your stock 10 bolt rear end sucks. Get either a 9 inch, or a 12 bolt as the guys above have said. gearing will depend on what your goals are. a common gear for 6 speeds is a 4.10 12 bolt, or 4.11 in the 9 inch. | |
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11-18-2008, 06:44 PM
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#7 | | Teching In
Join Date: Oct 2007 Location: whittier, CA
Posts: 22
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Quote:
Originally Posted by 406malibu ok, sounds like you dont know much about this, except that your stock 10 bolt rear end sucks. Get either a 9 inch, or a 12 bolt as the guys above have said. gearing will depend on what your goals are. a common gear for 6 speeds is a 4.10 12 bolt, or 4.11 in the 9 inch. |
I have the same stock 3.42s and i was wondering if that rear end is capable of handleling 400-450 hp?
__________________ 2001 Camaro Z28 Convertible
M6 | Volant cold air intake | Hurst short shifter | SLP Loudmouth II | Hypertech Programmer | 160* T-stat | Drilled/Slotted Rotors | Cosmetics 
NEVER ARGUE WITH AN IDIOT BECAUSE ALL THEY DO IS BRING YOU DOWN TO THEIR LEVEL AND BEAT YOU WITH EXPERIENCE! - MAVERICK32 | |
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11-18-2008, 06:51 PM
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#8 | | Staging Lane
Join Date: Jun 2007
Posts: 59
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it will handle the power for a little while but will eventually grenade like rest of them...
some people have had good luck with them though.... | |
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11-18-2008, 07:15 PM
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#9 | | TECH Enthusiast
Join Date: Nov 2005 Location: Newark,DE/E-City,NC
Posts: 645
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I have blown mine on basic bolt ons twice. The 10 bolt is a ticking timebomb just waiting and your cutting the fuse shorter with the more power you give it especially with a t56. If I could go back I would have dropped the coin on a rear before it broke the first time. It is the best longterm investment on any fbody plain and simple. There are guys out there who have broke into the 10's with 10bolts but they are all A4's. There are not to may of them either. I agree with 406malibu with the gears, no doubt.
__________________
1999 BLACK TA M6-MS3(114LSA)-PRC 5.3s-SSI built T56-S60w/4.10
2001 RED WS6 M6 #6101 -309whp/320wtq
2008 Black Trailblazer SS-RWD/daily driver | |
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11-19-2008, 12:48 AM
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#10 | | TECH Fanatic
Join Date: Nov 2006 Location: Fresno, California
Posts: 1,522
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9 inch for an M6 car, 12 bolt for an A4 is the commonly accepted theory here.
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'02 AW Z28....PRC 5.3L heads 59cc-224/228 114+2-Pacesetter's-9 inch 3.70-UMI, Strange, Spohn, and QA1 stuff.
420/390 rwhp/rwtq
PHK Fresno rep.
automotive hypochondriac | |
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11-19-2008, 06:05 AM
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#11 | | 12 Second Club
Join Date: Dec 2004 Location: Cooper City, FL
Posts: 886
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Quote:
Originally Posted by ZMONSTER! 9 inch for an M6 car, 12 bolt for an A4 is the commonly accepted theory here. | or fab9...none of the weight penalties and all + more of the strength 
Chad
__________________ Engine: heads/cam dart/torquerV2 stock bottom end HS rockers, ls6 intake Drivetrain: M6(soon to be A3) Moser 9 inch, strange pro case 4.11's Suspension: UMI LCA's/SFC's/PHB QA1's, midwest Chassis torque arm !front swaybar | |
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11-19-2008, 01:24 PM
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#12 | | TECH Fanatic
Join Date: Nov 2006 Location: Fresno, California
Posts: 1,522
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Quote:
Originally Posted by Nimitz87 or fab9...none of the weight penalties and all + more of the strength
Chad |
kinda wish I had gotten one, but Im happy with the moser 9 inch. Never have to worry about breaking it.
__________________
'02 AW Z28....PRC 5.3L heads 59cc-224/228 114+2-Pacesetter's-9 inch 3.70-UMI, Strange, Spohn, and QA1 stuff.
420/390 rwhp/rwtq
PHK Fresno rep.
automotive hypochondriac | |
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11-20-2008, 06:53 AM
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#13 | | TECH Fanatic
Join Date: Jun 2004 Location: Fairfield, Ohio
Posts: 1,209
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I had a 9" in my 93 T/A M6.....I killed a few ten bolts before I spend the money on a 9".
__________________
00 WS6 A4
Black on black lid and SLP LM
13.453 @ 103.90 2.095 60' (10/18/08)
93 T/A M6 SOLD
12.41 @ 109 1.73 60 foot (A4 10/03)
Dyno 372 HP 364 Torque (m6 4/05) | |
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11-20-2008, 06:59 AM
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#14 | | 11 Second Club
Join Date: Mar 2006 Location: Ali AB, Tallil, Iraq Kickin it in the sand..
Posts: 9,831
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I was running 11.1's on a 10-Bolt with my old A4 setup before it blew apart.
I bought a Moser 9" and I'm putting in a T56.
Most people go with 4.10's, I bought 3.89's to switch too, for now I'm keeping in my 3.50's to have a nice top-end pull. | |
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11-20-2008, 07:32 AM
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#15 | | TECH Apprentice
Join Date: May 2005 Location: York, PA
Posts: 324
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a good friend of mine has 605 rwhp, still has his 3.42 10 bolt.... and just broke 10.8s with it... amazing there....oh and he is a M6, but he is spinning alot...get a 9 inch and sleep better knowing you did
__________________ 1999 SS#4156
Everything just bolts-on really...  | |
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11-20-2008, 07:35 AM
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#16 | | 11 Second Club
Join Date: Mar 2006 Location: Ali AB, Tallil, Iraq Kickin it in the sand..
Posts: 9,831
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^^I'll let him use my Mickey's on my Drag Lites, he will kill it..  | |
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11-20-2008, 07:35 AM
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#17 | | TECH Fanatic
Join Date: Feb 2007 Location: Key West, Florida
Posts: 1,555
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if you don't beat on your rear end too bad, the 10bolt can hold up for a while.
but start doing hard launches and shifts with sticky tires...and its all over by the crying.
sofar i've been on my stock 10bolt...with just upgraded bearing studs and girdle for 4 yrs with 400rwhp. and i'm running a stage 4 clutch and 315s (even drag radials for 2yrs).
__________________ ARREST-ME RED 99 Z-28, M6 - TSP Torquer V1 (233/233 .589" 112*), Spec 4, Fidanza Alum FW, LS6 intake, HS rockers, Mez EWP, Flowtech LTs 3" X-pipe, magnaflow 4x9s, SSRA, TSP lid, GMS maf ends, fan switch, 160 stat, ASP pulley, Hurst w/LSS, prothane mounts, Russel brake lines, BMR lca w/ brackets, phb, stb, 32/21mm swaybars, sfc, ZR1s (17x9.5 front, 17x11s rear), Smoothlocks
382hp 375lb-ft torque need new #s BAD! FAST 90/90 goin on soon | |
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11-20-2008, 10:10 AM
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#18 | | On The Tree
Join Date: Oct 2005 Location: Las Vegas
Posts: 163
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While your modding id just throw a T/A girdle on it and call it a day if its your Daily Driver that occasionally sees the track. But ive had good luck with my 10 bolts (as have most of the people in my f-body club). My camaro 6spd has a 10bolt, my TA th400 has a 12bolt.
If your building a track car on the other hand, do a 9". And if your staying NA, 6spd... 4.10's was awsome, and despite what people will try to tell you i still got great gas mileage (17-18 mpg when i was driving hard) . | |
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11-20-2008, 11:43 AM
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#19 | | Registered User
Join Date: Jul 2008 Location: Massachusetts
Posts: 28
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Well the thing is it is not my daily driver. Right now i have the stock 10 bolt 3.42 as all m6's came with. But i do have 18in/315's on the back and 17in/275 up front. They are from a 2007 z06. Will this wheel and tire application worsen the wear on my rear end and raise the chances of it blowing or not? | |
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11-20-2008, 03:59 PM
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#20 | | On The Tree
Join Date: Oct 2005 Location: Las Vegas
Posts: 163
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Quote:
Originally Posted by Leandres629 Well the thing is it is not my daily driver. Right now i have the stock 10 bolt 3.42 as all m6's came with. But i do have 18in/315's on the back and 17in/275 up front. They are from a 2007 z06. Will this wheel and tire application worsen the wear on my rear end and raise the chances of it blowing or not? | Ok... well not being your DD, if it blows out... what do you lose? Nothing. You wanted to replace it anyways, right? Not like you were going to sell the stocker for much.
my buddies firebird is about 450hp 6.0L, centerforce 12" clutch, stock rear w/ 295/ 45/18's nitto 555r's he beats on it, and hasnt broken it yet.
My camaro is 500hp turbo, centerforce 12", stock rear 315/35/17 nitto555R's. Ive made passes at the track on ET streets, no problems yet.
Im not saying dont upgrade... im just saying people dont give stockers enough credit, and a new one wouldnt be first on my list. If you've got the money to spend before the car is 500hp go for it. Im sure ill be there eventually. | |
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