08-23-2013, 06:42 AM | #1 | |
Drives: 2010 Black 2SS Join Date: Oct 2011
Location: Berkeley Heights, New Jersey
Posts: 111
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Confused about gears / differential? This may help
Recently I've been delving into the idea of new gears on my SS M6 until I realized, I really had no idea what gears would be best or how they even really worked. I used the search to pull up a bunch of threads that I sifted through for info for hours and I realized a lot of other people seem to be confused about gear function too!
Anyway I stumbled on this video by accident and although it is a bit archaic, it's actually pretty informative check it out, Skip to 1:50 though oh and I think 3.91 gears are what I'll end up going with! |
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08-23-2013, 05:14 PM | #2 |
Drives: 2010 Inferno Orange 2SS/RS Join Date: Apr 2010
Location: Clermont, IN
Posts: 3,297
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Wow, that is an oldie. Interesting tho. Some things really havent changed.
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08-23-2013, 06:47 PM | #3 |
Drives: 2010 2SS/RS L99 IOM Join Date: Jan 2013
Location: South Jersey
Posts: 178
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Wow that was very informative! Thanks for sharing!
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08-23-2013, 07:49 PM | #4 |
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Very cool video. Thanks.
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2013 1SS/RS Coupe L99, Stainless Power Works LT Headers, SCT X4 Custom Tune from RDP, CAI Inc. Air Intake w/ Apex Scoop, VMAX CNC Ported Throttle Body, Solo Axle-Back Exhaust w/ J-pipes, Apex Catch Can, Husky Splash Guards, Heritage Grille, 3D Carbon Rear Spoiler, Oracle Chrome Turn Signal Bulbs, GM Reverse Light Trim Billets, Gorilla Black Locking Lugs, Emblem Pros Retro SS Badges/Custom Retro SS Kickplates/Under-hood Bowtie, 35% window Tint, Nitto Motivo Tires (6-8-18)
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08-23-2013, 08:53 PM | #5 |
Russ
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I want to go with 3.91 for my SS/M6 also but it's not as easy as it sounds. I've called a couple of car shops and neither of them would do the work. Hell I'm not even sure what I have to buy and I don't know how much work it is to simply change the gears. Is this a $500 labor mod, or $2000? Then someone on here said they have been waiting for 6 months to get into the dealer to recalibrate his speedo. How can I drive my car with an inaccurate speedo without getting a ticket?
From what I've read on C5 the 3.91 gears are the best for the SS and makes a very noticeable difference. Personally I would like to find a place that I can drop off my car and they will install the 3.91 gears that they supply but I haven't found any one that is willing to do it. Rarely do I ever buy parts that something isn't wrong, either the parts or wrong or there was something I didn't order. It seems like such a simply thing to change out a few gears but it sure isn't turning out that way. Russ |
08-23-2013, 09:11 PM | #6 |
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Drives: 2010 SS 426 V8 M/T Join Date: Aug 2012
Location: Scottsdale AZ
Posts: 1,376
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Very cool.
Even a Neanderthal like me can understand this Thanks for sharing. |
08-23-2013, 09:24 PM | #7 |
Moderator
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This thread is now a sticky.
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08-24-2013, 01:23 AM | #8 |
Drives: 2011 1SS/RS LS3 Join Date: Dec 2012
Location: Wilmington, DE
Posts: 319
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Since this is a sticky now... Might as well ask a few newbie questions to have cleared up. This is the differential obviously, but if you swap to 3.70/3.91/4.11 etc gears... does that mean it changes the actual axle gear as seen in the video? And the 1LE gearing is different, per gear, not just the final drive of 3.91... where are those gears? Thanks!
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08-24-2013, 09:49 AM | #9 |
Drives: 2013 ruby red tincoat HURST 1LT Join Date: Aug 2013
Location: Long Island , NY
Posts: 57
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please realize that changing your gears will throw off the speedometer and might throw off your computer - just a few problems with changing gears on new cars. I changed gears to 4:11 in my 85 IROC and had check engine lights go on and had to get a reducer for the speedo cable and was lucky to have overdrive otherwise my gas millage and top end would have suffered big time.
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08-24-2013, 11:08 AM | #10 |
"Cam Only"
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Very good video.
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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 |
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08-26-2013, 10:09 AM | #11 | |
Drives: 2010 RJT 2SS M6 Camaro Join Date: Feb 2011
Location: Garrison,KY
Posts: 1,548
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Quote:
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08-26-2013, 10:29 AM | #12 | |
Drives: 2010 RJT 2SS M6 Camaro Join Date: Feb 2011
Location: Garrison,KY
Posts: 1,548
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Quote:
The net effect is that the 1LE is geared almost exactly like a standard SS except when it is in 4th. I'm assuming that they did this to make 4th more useful in road racing without having to re-certify the package. It also explains why the 1LE's feel exactly like the standard SS when accelerating and are not significantly faster in a straight line.
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2010 RJT 2SS M6, Kooks Long Tubes, NPP Exhaust, CAI Cold Air w/Jannetty Scoop, RotoFab Washer Bottle, Elite Engineering Catch Can, MGW Shifter w/ZL1 Shaft and Knob, 2015 SS Sedan Steering Wheel and Air Bag, 2012 Heater Hose Conversion, 2012 Power Seat Conversion, RS Head Lights,Gen5DIY RS Conversion Harness, LED Fog Lamp Bulbs, Backup Camera Kit, NLP Spoiler, SLP Splitter, ZL1 Rockers and Diffuser, Color Matched Shark Fin, RS Roof Mouldings, Painted White Stripes, WCC LS3 Emblems, Heritage Grille and Blacked Out Tail Light Panel w/Retro SS Emblems, 416 RWHP, 411 RWT, Tuned by BlueCat.
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08-26-2013, 08:28 PM | #13 |
Drives: 2010 RS/SS 1934 Ford Coupe Join Date: Jan 2013
Location: Akron,Ohio
Posts: 57
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I just installed my 3.91s this past Saturday. Getting the unit out the car was simple, but once I tore into it I got a little nervous. Had a friend who has done a lot traditional style rear ends stop by and give me a hand. The only tricky/hard part was setting the crush sleeve correctly, took a 4ft breaker bar to set it to the gm specs (18-27ft lbs rotational). After that, slid the ring assembly back in, put the factory shims back in, and torq everything down. then checked the back lash, gm rec .002-.005...mine was .006 so I left it. Right now I am 175 miles into the break in, and everything sounds perfect!!
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08-26-2013, 08:38 PM | #14 |
Drives: 2010 RS/SS 1934 Ford Coupe Join Date: Jan 2013
Location: Akron,Ohio
Posts: 57
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Forgot.. I have a HP tune in the car and the tuner stopped over when I finished. Plugged his lab top in and took 5 mins to go in and change the final drive so my speedo was correct!!
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