1LE Differential and Half Shafts/Axles Part Numbers - Page 23 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Mr_Draco · 09-11-2012, 03:38 PM

Quote:

Originally Posted by Kent2010

How is everyone accounting for the new gear ratio? A tune? Can it be changed via a Tech2 by a dealer?

I'd love to have the 3.91's but I don't want to risk my entire 100k mile drivetrain warranty by adding a tune. I am hoping there is another option.

Auto or stick?

I know the auto requires a tune. I don't know about stick.

pouncer72 · 09-11-2012, 04:12 PM

Tune.

pouncer72 · 09-11-2012, 04:13 PM

Quote:

Originally Posted by blazzin1

True....True. I have the manual, and definitely plan on beefing up the rear end a little bit when I change the gears. But I'm having a hard time deciding if I want to just put in the posi-fix, or change out the entire posi-unit for that Eaton Tru-Trac. I seriously doubt I'll ever be over like 580hp or so, so I'm thinking the posi-fix will probably be enough.

The posi fix helps the one wheel peel, and the billet caps help the gears, but the weak point is the posi unit's spider gears themselves. They will die, no matter what you do under a large shock load (M6 clutch dump + traction). Best bet to keeping the 8.6 alive is to go to an eaton/auburn helical type posi, now that one is available. If I destroy another set of spiders, one will end up in my car.

khislop007 · 09-11-2012, 04:33 PM

What else comes with the gear set? Do you have to buy the install kit separate?

camarostar2010 · 09-11-2012, 05:03 PM

I just destroyed my spider set...recommendations from the best "DSS, GFORCE, etc..." is a 9 bolt rear with eaton trutrac or wavetrac. Cost big bucks, but they are bullet proof...for anything doing 600 rwhp or over its a must do. I got 10k out of my rear without one track day and spirited driving only, then on a good shift with maybe 60 percent throttle she went to bits.

SLO RYDE · 09-11-2012, 05:34 PM

Re 3.91 gears
This the best news I've read in a while.

SUKXOST · 09-11-2012, 05:50 PM

Quote:

Originally Posted by Higgs Boson

How do the wheels work? The 1LE wears 20x10 on all four corners right? Are they unique rear 20x10s with a different offset or are the 20x11s with 285s mounted?

both 10's and 11's are wrapped in 285s

pouncer72 · 09-11-2012, 05:53 PM

Quote:

Originally Posted by khislop007

What else comes with the gear set? Do you have to buy the install kit separate?

It comes with a pinion crush washer, pinion nut, and new ring gear bolts. All you should need are shims for the pinion, you shouldn't need a full install kit unless you want to swap your current bearings for new ones, or something is wrong with the ones you have. Most driveline shops will stock the necessary shims, or you can order just a shim kit from Yukon gear for relatively cheap.

khislop007 · 09-11-2012, 10:37 PM

Quote:

Originally Posted by pouncer72

It comes with a pinion crush washer, pinion nut, and new ring gear bolts. All you should need are shims for the pinion, you shouldn't need a full install kit unless you want to swap your current bearings for new ones, or something is wrong with the ones you have. Most driveline shops will stock the necessary shims, or you can order just a shim kit from Yukon gear for relatively cheap.

Sweet! Oh man I can't wait to get this done.

caverman · 09-11-2012, 11:02 PM

Quote:

Originally Posted by pouncer72

Total install cost for the 3.91s for me was $159.50 at the local diff/trans shop plus the cost of an axle seal. I brought them the pumpkin. Hell of a deal if you ask me. Cant wait to get it back in the car

Was that $159 for just the install?

Assuming even worst case of $300 for gears and then $160 for install....freakin' smoking deal. To me that's more realistic of a gear swap than the $1,400 bend over I had to take.

Love the 3.91 gears though. I can't look back now. I'm just keeping my fingers crossed that they stay together for a long, long time.

Smkymts · 09-12-2012, 01:31 AM

All this info is great for the DIY mechanics. But in the end, the proof is in the ETA! If you have a 2SS M6, what is a realistic gain in 60' times, 1/8 mile and 1/4 mile times over the stock rear gears, with everything else being equal. Just trying to figure out the true bang for the buck verses the hype. Especially if your running a M6 and have to shift an extra gear with the 3.91 before the 1/4 mile finish line. What is everyone hoping to gain by doing this swap? I'm not a mechanic, so not real schooled in technical side.

Avalnch · 09-12-2012, 01:35 AM

Now just need to break them in. Will be picking the car up tomorrow. Note the Pfadt diff bushings?
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ackeight · 09-12-2012, 09:58 AM

Quote:

Originally Posted by Smkymts

All this info is great for the DIY mechanics. But in the end, the proof is in the ETA! If you have a 2SS M6, what is a realistic gain in 60' times, 1/8 mile and 1/4 mile times over the stock rear gears, with everything else being equal. Just trying to figure out the true bang for the buck verses the hype. Especially if your running a M6 and have to shift an extra gear with the 3.91 before the 1/4 mile finish line. What is everyone hoping to gain by doing this swap? I'm not a mechanic, so not real schooled in technical side.

I can imagine this swap is more of a benefit to road racing than straight line. Great deal regardless. I'm adding this to my list of things to do. Everyone I've talked to besides supercharged guys say this is there favorite mod.

Big C CamaroSS · 09-12-2012, 10:04 AM

I have been reading about the 3.91/1LE gears being a big improvement on the stock gears (2010 Camaro SS). And I think its a mod that is worth doing, but doing RIGHT!!! With the rear end dropped for the gears install, what Pedders bushings should I install for even more improvement?

I searched, but I'm really walking in a fog on this one. Can anyone help me out?

09-11-2012, 04:33 PM	#312
khislop007 ZEUSS Drives: Hard! Join Date: Sep 2008 Location: Cayman Islands Posts: 2,567 View My Garage	What else comes with the gear set? Do you have to buy the install kit separate? __________________

09-11-2012, 05:34 PM	#314
SLO RYDE SLO RYDE Drives: 2011 IOM 2SS/RS 400hp+ / K&N CAI./ Join Date: Apr 2011 Location: Winter Spings, FL Posts: 355	Re 3.91 gears This the best news I've read in a while. __________________ 2011 2SS/RS IOM. / K&N CAI./ V Max Throtle Body / Pypes Headers & Pype Bomb exhaust. / Texas Speed 231/236 112 Ls3 cam/ RX Catch Can/ SLP Under Drive Pulley/ American Racing Torque M Wheels painted. / CBD Rear Wing, SunCoast Creations Bumbble Bee Hood, Heritage Grill/ SLP "SS" Badges and tuned by "TampaTuning.com" & Next Level Performance

09-12-2012, 01:35 AM	#320
Avalnch Drives: Rally Yellow Camaro+Avalanche Join Date: Dec 2009 Location: Vancouver Posts: 1,110	They Fit! Now just need to break them in. Will be picking the car up tomorrow. Note the Pfadt diff bushings? __________________ Vengeance Kaotik Cam, C.A.I., ARH LT, Pypes Cat Back, ZL1 Shifter+2012LS3VERT bushing, Quantum Brake Ducts, JDP Tow Hook Scorch Yellow Trim Kit, Shark Fin, AAC DRLs+ABLs+SMDs, ZTA Rear Spoiler, R.Y. 1LE Splitter. Pfadt coilovers, camber plates, trailing arms, Pegasus Solid Subframe. Pedders ZL1 barz, radius arm & steering rack bushings. BMR adjustable toe-rods. Hotchkis Max Chassis Brace. ZL1 GMPP Driveline Upgrade. TurnOne P/S pump. CTS-V 6 pistons. 447 HP @ 6180 RPM / 418 TQ @ 5100 RPM

09-11-2012, 04:12 PM	#310
pouncer72 Account Suspended Drives: 2011 Camaro SS Join Date: Apr 2012 Location: Richmond Hill, GA Posts: 365	Tune.

09-11-2012, 05:03 PM	#313
camarostar2010 Drives: 2011 SS Join Date: Nov 2011 Location: new jersey Posts: 379	I just destroyed my spider set...recommendations from the best "DSS, GFORCE, etc..." is a 9 bolt rear with eaton trutrac or wavetrac. Cost big bucks, but they are bullet proof...for anything doing 600 rwhp or over its a must do. I got 10k out of my rear without one track day and spirited driving only, then on a good shift with maybe 60 percent throttle she went to bits.

09-12-2012, 01:31 AM	#319
Smkymts Drives: 2011 Camaro Convertible SS Join Date: Nov 2011 Location: Tennessee Posts: 146	All this info is great for the DIY mechanics. But in the end, the proof is in the ETA! If you have a 2SS M6, what is a realistic gain in 60' times, 1/8 mile and 1/4 mile times over the stock rear gears, with everything else being equal. Just trying to figure out the true bang for the buck verses the hype. Especially if your running a M6 and have to shift an extra gear with the 3.91 before the 1/4 mile finish line. What is everyone hoping to gain by doing this swap? I'm not a mechanic, so not real schooled in technical side.

09-12-2012, 10:04 AM	#322
Big C CamaroSS Drives: Black Camaro 2SS/RS 1LE Join Date: Jun 2011 Location: Belleville, Ontario, Canada Posts: 1,145	I have been reading about the 3.91/1LE gears being a big improvement on the stock gears (2010 Camaro SS). And I think its a mod that is worth doing, but doing RIGHT!!! With the rear end dropped for the gears install, what Pedders bushings should I install for even more improvement? I searched, but I'm really walking in a fog on this one. Can anyone help me out?