Automatic rear diff to 6 speed rear diff - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Garys16SS · 12-17-2012, 02:09 PM

I purchased an automatic 2013 ZL1 and I would like to remove the stock diff complete with 3.23s and purchase a 6 speed diff complete with 3.73s and install. Has anybody accomplished this and if they have, what problems may or may not have occured.

DangerZL1 · 12-17-2012, 02:33 PM

Wouldn't it be easier and way less expensive to order the 3.73 gears and have someone install them? The first gear auto is lower than the first gear in the manual, so I also wonder it this is a good idea.

Drew P · 12-18-2012, 06:48 AM

What is your purpose for the swap?

Stephen12ZL1 · 12-18-2012, 08:47 AM

With the 6 auto tranny ratios that are present, you really won't gain much from this expensive swap. Concentrate on airflow mods, boost, cooling, and tune for more performance and you will find there is no need to swap rear ratios. If it were your typical 4L60E with only 4 speeds, then maybe a viable option.

*radz28* · 12-18-2012, 09:13 AM

Or stab a little loser converter in there

Garys16SS · 12-20-2012, 04:09 PM

The costs are not the question, but Stephen12ZL1 and radz28 have made some suggestions that are plausable which I appreciate. I already have a Roto-Fab and presently looking at the pulleys/damper/headers. And to answer Drew P, I run my "hobby cars " strong on the streets/highways and "stop lite to stop lite". According to RPM Transmissions, they advised just buying the ZL1 6 speed rear and they have customers doing that. I tried buying the Chevy 3.73 6 speed gears but there is not a price listed for them according to the local Chevy parts person. Starting the mods!!!!

SS ORANGE CRUSH SS · 12-20-2012, 04:14 PM

You will get rid of the drone!?!?!

Dega Man · 01-03-2013, 11:13 AM

Have you checked with Richmond for a ring & pinion gear set? 3.73 in the auto is just going to have you spinning a lot more off the line. The more HP you add to your engine the better off you will be with the 3.23 gearing in the auto.

Garys16SS · 07-25-2013, 07:55 AM

Unfortunately, I have a ZL1 diff from a 6 speed sitting in my "mancave" and my mind wanders with ideas.

mrvenicess · 07-25-2013, 11:12 AM

Gonna be revving like crazy on the hwy!

SC2150 · 07-25-2013, 11:29 AM

If you want to go quicker in the 1/4 mile get a good stall converter like the FTI triple disc.

12-17-2012, 02:09 PM	#1
Garys16SS Drives: 2016 SS, BLACK, MANUAL Join Date: Apr 2010 Location: pittsburgh, pa Posts: 277	Automatic rear diff to 6 speed rear diff I purchased an automatic 2013 ZL1 and I would like to remove the stock diff complete with 3.23s and purchase a 6 speed diff complete with 3.73s and install. Has anybody accomplished this and if they have, what problems may or may not have occured. __________________ 2016 Black/Black SS, 6speed, MRC, Roto-Fab air intake, Vitesse controller, 1 7/8" headers and exhaust from Stainless Works complete with nonNPP mufflers and 5"outlets, Katech ported TB, Moroso catch can, MRR M017 polished powder wheels, Eibach lowering springs, and BMR upper/ lower trailing arms and upper control arms. ZL1/1le sway bars and Magnusson Supercharger with Jannetty tune. Stay Tuned!!!......More to come. 2014 Camaro Ashen grey, 3.6, 6 speed, Vararam intake, Elite catch can, chrome wheels, and Vitesse controller. 2003 SSR red, 2016 Vette

12-18-2012, 08:47 AM	#4
Stephen12ZL1 Drives: '21 ZLE A10 Join Date: May 2012 Location: Mechanicsville, VA Posts: 6,808	With the 6 auto tranny ratios that are present, you really won't gain much from this expensive swap. Concentrate on airflow mods, boost, cooling, and tune for more performance and you will find there is no need to swap rear ratios. If it were your typical 4L60E with only 4 speeds, then maybe a viable option. __________________ '21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60' '17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold) '15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold) '12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold)

12-18-2012, 09:13 AM	#5
radz28 Petro-sexual Drives: Ultra-Grin Join Date: Oct 2006 Location: Crazy Coast Posts: 15,192 View My Garage	Or stab a little loser converter in there __________________ '20 ZL1 Black "Fury" A10, PDR, Exposed CF Extractor Magnuson Magnum DI TVS2650R // RFBG // Soler 103 // TooHighPSI Port Injection // THPSI Billet Lid // FF // Katech Drop-In // PLM Heat Exchanger // ZLE Cradle bushings // BMR Chassis-Suspension Stuff // aFe Bars // Diode Dynamics LEDs // ACS Composites Guards // CF Dash // Aeroforce // tint // other stuffs

12-20-2012, 04:09 PM	#6
Garys16SS Drives: 2016 SS, BLACK, MANUAL Join Date: Apr 2010 Location: pittsburgh, pa Posts: 277	The costs are not the question, but Stephen12ZL1 and radz28 have made some suggestions that are plausable which I appreciate. I already have a Roto-Fab and presently looking at the pulleys/damper/headers. And to answer Drew P, I run my "hobby cars " strong on the streets/highways and "stop lite to stop lite". According to RPM Transmissions, they advised just buying the ZL1 6 speed rear and they have customers doing that. I tried buying the Chevy 3.73 6 speed gears but there is not a price listed for them according to the local Chevy parts person. Starting the mods!!!! __________________ 2016 Black/Black SS, 6speed, MRC, Roto-Fab air intake, Vitesse controller, 1 7/8" headers and exhaust from Stainless Works complete with nonNPP mufflers and 5"outlets, Katech ported TB, Moroso catch can, MRR M017 polished powder wheels, Eibach lowering springs, and BMR upper/ lower trailing arms and upper control arms. ZL1/1le sway bars and Magnusson Supercharger with Jannetty tune. Stay Tuned!!!......More to come. 2014 Camaro Ashen grey, 3.6, 6 speed, Vararam intake, Elite catch can, chrome wheels, and Vitesse controller. 2003 SSR red, 2016 Vette

12-20-2012, 04:14 PM	#7
SS ORANGE CRUSH SS Drives: Inferno Orange 2SS RS Convertible Join Date: Aug 2011 Location: Edmonton Canada Posts: 636	You will get rid of the drone!?!?! __________________ Likes to Cruise!!!!

12-17-2012, 02:33 PM	#2
DangerZL1 Drives: 2023 Black ZL1 Auto Join Date: Oct 2009 Location: FEMA Region 4 Posts: 2,935	Wouldn't it be easier and way less expensive to order the 3.73 gears and have someone install them? The first gear auto is lower than the first gear in the manual, so I also wonder it this is a good idea.

12-18-2012, 06:48 AM	#3
Drew P Drives: Camaro ZL1 Join Date: May 2012 Location: Houston Posts: 233	What is your purpose for the swap?

01-03-2013, 11:13 AM	#8
Dega Man Drives: ZL1 Join Date: Oct 2012 Location: Talladega Posts: 631	Have you checked with Richmond for a ring & pinion gear set? 3.73 in the auto is just going to have you spinning a lot more off the line. The more HP you add to your engine the better off you will be with the 3.23 gearing in the auto.

07-25-2013, 07:55 AM	#9
Garys16SS Drives: 2016 SS, BLACK, MANUAL Join Date: Apr 2010 Location: pittsburgh, pa Posts: 277	Unfortunately, I have a ZL1 diff from a 6 speed sitting in my "mancave" and my mind wanders with ideas. __________________ 2016 Black/Black SS, 6speed, MRC, Roto-Fab air intake, Vitesse controller, 1 7/8" headers and exhaust from Stainless Works complete with nonNPP mufflers and 5"outlets, Katech ported TB, Moroso catch can, MRR M017 polished powder wheels, Eibach lowering springs, and BMR upper/ lower trailing arms and upper control arms. ZL1/1le sway bars and Magnusson Supercharger with Jannetty tune. Stay Tuned!!!......More to come. 2014 Camaro Ashen grey, 3.6, 6 speed, Vararam intake, Elite catch can, chrome wheels, and Vitesse controller. 2003 SSR red, 2016 Vette

07-25-2013, 11:12 AM	#10
mrvenicess Drives: 2013 CRT ZL1 auto Join Date: May 2010 Location: Venice Fl Posts: 1,443 View My Garage	Gonna be revving like crazy on the hwy!

07-25-2013, 11:29 AM	#11
SC2150 Account Suspended Drives: 2012 Camaro RS, RX supercharged Join Date: Dec 2009 Location: Bradenton, FL Posts: 6,063	If you want to go quicker in the 1/4 mile get a good stall converter like the FTI triple disc.