More aggressive gearing

mrgoodbytes · 03-31-2020, 11:09 AM

Are there any options out there for changing the gearing or final drive on the M6 SS to make the gears a little shorter?

Is the final drive of the SS and the SS 1LE identical?

easttxss · 03-31-2020, 11:11 AM

I don't think there are any gear options for the 6th gen.

SSDan · 03-31-2020, 11:14 AM

Quote:

Originally Posted by mrgoodbytes

Are there any options out there for changing the gearing or final drive on the M6 SS to make the gears a little shorter?

Is the final drive of the SS and the SS 1LE identical?

I've read a number of threads about this and no one to date has found an aftermarket rear gear available.

I believe the rear gear ratio for the SS and SS 1LE is the same: 3.73

KingLT1 · 03-31-2020, 11:18 AM

Sure, but it takes a 6k geforce 9" swap to do it...then you will have lots of gear options.

vtirocz · 03-31-2020, 11:24 AM

Quote:

Originally Posted by mrgoodbytes

Are there any options out there for changing the gearing or final drive on the M6 SS to make the gears a little shorter?

Is the final drive of the SS and the SS 1LE identical?

Maybe consider going to a shorter wheel/tire combo to effectively get you the more aggressive / shorter gearing. It doesn't appear to be cost effective otherwise.

easttxss · 03-31-2020, 11:27 AM

Quote:

Originally Posted by KingLT1

Sure, but it takes a 6k geforce 9" swap to do it...then you will have lots of gear options.

https://gforce1320.com/product/6th-g...aro-9-irs-kit/
They must have had a price increase. $7100-$7500 now.

indy82z · 03-31-2020, 11:30 AM

Has anyone swapped the rear gears out of a 6 speed car into an automatic car and got rid of the 2.77 gears? I know back in the 80's 5.7 Iroc's could be had with 2.77 or 3.23 gears and those cars were night and day differences in relation to performance.

vtirocz · 03-31-2020, 11:32 AM

Quote:

Originally Posted by indy82z

Has anyone swapped the rear gears out of a 6 speed car into an automatic car and got rid of the 2.77 gears? I know back in the 80's 5.7 Iroc's could be had with 2.77 or 3.23 gears and those cars were night and day differences in relation to performance.

Sweet IROC-Z collection... let's see some pics

Fraxum · 03-31-2020, 11:48 AM

Quote:

Originally Posted by vtirocz

Sweet IROC-Z collection... let's see some pics

Snowblind did this with his NA 9 second A8 SS a long time ago. Not sure he is still running this.

No one is running now anyway. :(

I am so wondering what my stock M6 LT1 will do with tires. Are high 11s possible? My Dragstars sit waiting for the falll........

KingLT1 · 03-31-2020, 12:23 PM

Quote:

Originally Posted by indy82z

Has anyone swapped the rear gears out of a 6 speed car into an automatic car and got rid of the 2.77 gears? I know back in the 80's 5.7 Iroc's could be had with 2.77 or 3.23 gears and those cars were night and day differences in relation to performance.

It's not just a gear swap you have to swap the entire diff because the ring gear is welded and not removable...but yes it has been done. Dan Hacker is running a 3.73 M6 diff in his A8 car.

Quote:

Originally Posted by easttxss

https://gforce1320.com/product/6th-g...aro-9-irs-kit/
They must have had a price increase. $7100-$7500 now.

Not surprised...everything keeps going up in cost.

Jeb114 · 04-01-2020, 07:27 AM

Plus reprogramming the ECM

NowaChevyGuy · 04-01-2020, 11:11 AM

Quote:

Originally Posted by indy82z

Has anyone swapped the rear gears out of a 6 speed car into an automatic car and got rid of the 2.77 gears? I know back in the 80's 5.7 Iroc's could be had with 2.77 or 3.23 gears and those cars were night and day differences in relation to performance.

I did this and LOVE IT!.

I have a 16 RS automatic. About 2 years ago I picked up a 2017 2.0T manual dif and axles from a salvage yard in LA ($700). The Manual 2.0 has a 3.23 gear ratio as well as a limited-slip diff. I can also tell you the 2.0 axles are WAY beefier than the v6 stocks were. It's a direct swap and I did a Trifecta tune at the same time having them adjust for the ratio change.

Night and day difference. I have a throttle controller in the car which was a god patch to the low-end throttle hole but nothing like this gear change did. Like a duck to water, the v6 was born for this swap. Thinking there would be a trade I was happy to find I lost no top end with that A8, just all low end all day and all at 19mpg.

Mountain · 04-01-2020, 02:01 PM

Answers are in the "Transmissions" technical section.

mrgoodbytes · 04-02-2020, 04:43 AM

I'd like to thank everyone for all the fast and good replies. It sounds to me like I'm not the only one who thinks the gearing ratio for the 6-speed manual is a little on the tall side.

I was hoping it was possible to change out the diff gears, as that would probably be the cheapest option. Too bad they are not replaceable.

03-31-2020, 11:09 AM	#1
mrgoodbytes Drives: '18 2SS/EU (+Recaros) M6 Red Hot Join Date: Nov 2018 Location: Sweden Posts: 260	More aggressive gearing Are there any options out there for changing the gearing or final drive on the M6 SS to make the gears a little shorter? Is the final drive of the SS and the SS 1LE identical?

03-31-2020, 11:11 AM	#2
easttxss Drives: '16 2SS M6 Join Date: Aug 2019 Location: Hughes Springs, TX Posts: 320	I don't think there are any gear options for the 6th gen. __________________ David '16 2SS M6 black on black, SW long tube full exhaust, NPP, Roto-fab CAI, ported stock TB '16 2SS M6 black w/Metallic black stripes, Kalahari, 6 piston front (totaled 1/22/20) '14 Fusion Titanium 2.0T '83 Jeep Wagoneer

03-31-2020, 11:18 AM	#4
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 6,799	Sure, but it takes a 6k geforce 9" swap to do it...then you will have lots of gear options. __________________ 2016 NFG 1SS A8 Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA

03-31-2020, 11:30 AM	#7
indy82z Drives: 2018 Camaro SS HW Edition, 2020 LT1 Join Date: Jan 2017 Location: Columbus Ohio Posts: 109	Has anyone swapped the rear gears out of a 6 speed car into an automatic car and got rid of the 2.77 gears? I know back in the 80's 5.7 Iroc's could be had with 2.77 or 3.23 gears and those cars were night and day differences in relation to performance. __________________ 1987 Camaro IROC-Z 6.0 LS 4L80 1988 Camaro IROC-Z TPI 5-Speed 1992 Camaro B4C 5.7 TPI 2018 Camaro SS Hot Wheels Edition #838

04-01-2020, 07:27 AM	#11
Jeb114 Drives: 2021 300 Join Date: Jan 2015 Location: New Jersey Posts: 968	Plus reprogramming the ECM

04-01-2020, 02:01 PM	#13
Mountain Drives: 2017 SS 1LE, 2016 1SS (previous) Join Date: Apr 2016 Location: Metro-Detroit Posts: 1,863	Answers are in the "Transmissions" technical section.

04-02-2020, 04:43 AM	#14
mrgoodbytes Drives: '18 2SS/EU (+Recaros) M6 Red Hot Join Date: Nov 2018 Location: Sweden Posts: 260	I'd like to thank everyone for all the fast and good replies. It sounds to me like I'm not the only one who thinks the gearing ratio for the 6-speed manual is a little on the tall side. I was hoping it was possible to change out the diff gears, as that would probably be the cheapest option. Too bad they are not replaceable.

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