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04-04-2015, 10:57 AM
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#1 |
  
Drives: T Join Date: Mar 2015
Location: CA
Posts: 803
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Gear's and Posi
i am in the process of having 3.91's put in my L99. I am seeing more options to beef up the rear.
People are doing JRE posi mod or going for an entire eaton trutrac posi. What are some of you guys running? my car has about 30k miles on it it currently has full boltons and a tune but i plan to do head cam and if so potentially a blower in the future. Is the stock posi and rear diff ok with just 3.91 gears? Should i do the posi mod or go for a more aggressive eaton trutrac? Or is there even a better option? I hardly see posi units mentioned wanted to utilize the down time with having the diff out to really beef it up if needed. Lets talk about these rear ends, whats everyone running and on what setup? 
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04-04-2015, 11:38 AM
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#2 |
   
Drives: 14 1LE Join Date: Mar 2013
Location: Spokane, WA
Posts: 1,567
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What do you use your car for? Street, drag or road course?
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LMS Engineering
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04-04-2015, 11:40 AM
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#3 | |
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Drives: T Join Date: Mar 2015
Location: CA
Posts: 803
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Quote:
I daily drive the car, but i beat the piss out of it. I want it to see occasional drag track time with a few more mods done. |
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04-04-2015, 12:47 PM
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#4 |
Drives: 2010 2SS Join Date: Sep 2012
Location: Canada
Posts: 800
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get the eaton truetrac and be done. love it!
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2010 2SS- 562whp/634wtq 12 psi on3 turbo 78mm magnum /w aem truboost, pat g cam, Kooks 3" catback, Factory Rep 41s with 285/315 20" michelin PSS, Snow Meth, Hex Hood Vents, ZL1 FP & ADM FPCM /w JMS BAP, ID 850s, DSS lvl 4 axles & aluminum 1 piece D/S, Total Pro BMR bushings, fe4 sways, toe rods & trailing arms, Prothane engine mounts, MGW shifter, eaton true trac, mantic 9000 clutch, idealg master cylinder, JDP clutch oil reservoir, ram clutch pedal adjust, Tick clutch & bleed lines, Dewitts Rad
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04-04-2015, 02:01 PM
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#5 |
Drives: 2010 2SS/RS 6spd LS3 Join Date: Jan 2015
Location: Oregon
Posts: 581
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who makes the factory Unit?
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04-04-2015, 03:59 PM
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#6 |
 
Drives: 2011 2SS/RS & 2017 1SS Join Date: Apr 2011
Location: Maryland
Posts: 1,960
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L99 with 3.91 and Eaton Truetrac over here. Love it. If you are going to do it just get the TrueTrac and be done.
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2011 Chevrolet Camaro 2SS/RS L99 (1 of 782)
10.78 @125mph ALL MOTOR SBE Built/Tuned by Me 2017 Chevrolet Camaro 1SS Auto 9.29 @144.57mph ALL MOTOR SBE #TEAMGPI Gwatney Performance Innovation |
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04-04-2015, 04:22 PM
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#7 |
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Drives: 99 Camaro; 2010 Camaro 2SS/RS Join Date: Nov 2009
Location: louisiana
Posts: 1,965
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jre posi mod here 1.38 60ft
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2018 Camaro SS A8 Edelbrock 2650 FBO 93 octane 9.54@144 Pump E 9.59@152
2010 Camaro Stock bottom end with 46,000+miles JRE remote tuning Whipple A6 and Drive it to and from the track 9.46@146  |
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04-04-2015, 04:43 PM
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#8 |
Drives: 2011 2ss/rs Join Date: Nov 2011
Location: Canada
Posts: 1,431
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3.91 and Jre posi mod. Wicked!
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04-04-2015, 04:57 PM
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#9 |
    
Drives: 2013 SS Join Date: May 2013
Location: DFW
Posts: 4,102
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3.91s stock unit been 10.70s and 6.80s race 3 days out of the week and cut 1.49 60fts and still going
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04-04-2015, 05:02 PM
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#10 | |
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Drives: 2010 2SS/RS 6spd LS3 Join Date: Jan 2015
Location: Oregon
Posts: 581
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Quote:
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04-04-2015, 05:15 PM
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#11 |
 
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I'm planning on doing the 3.73 gears and Eaton Trutrac for my L99 but I'm more interested in twisties than drag racing.
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04-04-2015, 06:41 PM
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#12 |
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LVL 50 Troll Stomper
Drives: 2010 Camaro Join Date: Feb 2008
Location: Indianapolis
Posts: 3,463
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3.73s, trutrac, JRE billet caps, and LPW Cover with the support bolts or whatever, holding strong
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04-04-2015, 10:12 PM
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#13 |
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"Cam Only"
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Getting 3.91's installed on Wednesday at CMS. No trutrac.
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2013 AGM Camaro 2SS/RS M6 | LSA Blower, 2.5" pulley, 10% lower, FIC1000's, Fore Innovations Twin Pump fuel system w/ Flex Fuel, CMS Custom Grind Cam, Kooks 1 7/8" headers w/ catless off-road pipes, NPP Exhaust, 3.91's, JLT ZL1 Intake, Prospeed Heat Exchanger | Pfadt Suspension, 1LE Sway Bars | DSS 1000hp axles |
Tuned by Ryne @ CMS E85: 734rwhp/636rwtq (mustang dyno) |
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04-04-2015, 10:25 PM
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#14 |
Drives: 2010 camaro ss Join Date: Jun 2010
Location: Port Arthur, Tx
Posts: 2,383
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3.91's with true trac here on a ls3 here. Been good for a year so far
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