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: 259	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.

12-18-2012, 08:47 AM	#4
Stephen12ZL1 Drives: '17 ZL1 A10 Join Date: May 2012 Location: Mechanicsville VA Posts: 5,091	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. __________________ '17 ZL1 A10 Mosaic Black PDR/Nav 2:07.59 VIR Full 11.08@126.52 1.76 '15 Z/28 #325 black a/c & stereo. 2:10.1 VIR Full (sold) '12 ZL1 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: Crapramento, Crapifornia Posts: 13,080 View My Garage	Or stab a little loser converter in there __________________ 05 Hummer H2 SUV on OEM Air Ride Forged 11.4:1 408 LQ4 (K1 crank & rods; Mahle pistons)/CPP LS3 CNC heads/BTR Stage IV LS3 cam/home ported L92 intake manifold/ported 90mm TB/custom Volant CAI/Kooks 1 7/8" LTs and 3" H-pipe/AFE dual 3" CB/Corvette Servo/el cheapo lift/Cognito UCAs/Sphon poly adjustable TA/Sphon adjustable rear LCAs/e'fan conversion/DirtyMax radiator/Moroso catchcan/HPTuners/HID conversion/LED exterior lighting/LED interior accents/Autometer Cobalts/AEM WB/ Pioneer AVH-5600BHS/Pioneer GM-9601/2-Pioneer TS-W310D4s/Obcon Labyrinth dual-12 box/lots of other little stuff

12-20-2012, 04:09 PM	#6
Garys16SS Drives: 2016 SS, BLACK, MANUAL Join Date: Apr 2010 Location: pittsburgh, pa Posts: 259	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.

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: Future ZL1 Owner Join Date: Oct 2009 Location: West TN Posts: 2,135	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: 542	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: 259	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.

07-25-2013, 11:12 AM	#10
mrvenicess Drives: 2013 CRT ZL1 auto Join Date: May 2010 Location: Venice Fl Posts: 1,410 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: 6,068	If you want to go quicker in the 1/4 mile get a good stall converter like the FTI triple disc.