Z28 diff swap. - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Scottiemac · 05-22-2017, 10:14 AM

What is needed to swap a z28 diff into an SS? Axles? Driveshaft? And yes the differential. Leaning towards this over 1le. Both are 3.91 and it shows on the GM online #23172756. The 1le is discontinued from GM but the z28 is still on line with that number and reasonable. I'm investigating what is needed to do this or just regear what I have. I have a new 3.91 gear set. Online parts says it doesn't fit my 2015 SS. That's not what I've been told but looking for input. Thanks

Firefighter · 05-22-2017, 10:21 AM

What's it going for? It would be drop in and warrantied. Might be a viable option.

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Scottiemac · 05-22-2017, 11:03 AM

The # I have is 23172756 and two GM sights are around $1100. If it's still available and a drop in without changing driveshaft I'll spring for the original axles but if I would need to change driveshaft, axles and hubs I may just redo mine.

Firefighter · 05-22-2017, 11:17 AM

Quote:

Originally Posted by Scottiemac

The # I have is 23172756 and two GM sights are around $1100. If it's still available and a drop in without changing driveshaft I'll spring for the original axles but if I would need to change driveshaft, axles and hubs I may just redo mine.

By the time you get a TruTrac and have it installed with all the other stuff it'll cost more than that and be less convienent.

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Scottiemac · 05-22-2017, 12:56 PM

Does anyone have the part# off their z28 rear. I've been told two different numbers both listed as differential assy z28. 23172756 and23172755. Quite a difference in price. Maybe 23172756 is the center section and the 23172755 is the complete? Still looking for answers.

Dirty Harry · 05-22-2017, 08:46 PM

I'm pretty sure 23172756 is the torsen diff itself (no housing), while 23172755 is a complete diff assembly. I'm unsure on axle and DS needs.

From Pace Performance complete Z28 diff assembly:
http://paceperformance.com/i-1999112...al-module.html

JDP Motorsports does complete SS diff assemblies:
http://www.jdpmotorsports.com/manufa...-ss-jdp-dt1001

Scottiemac · 05-22-2017, 10:12 PM

Thanks for the info. I prefer a drop in diff but if for the cost of axles and hubs maybe a driveshaft I'm getting too close to the zl1. Which if I had to spend that much I would much rather have a zl1 diff. I thought that one # was awful cheap. GM parts direct never clarified it.

sixty9fordkiller · 12-04-2017, 09:16 PM

did you ever find out if the driveshaft and axles/hubs need to be changed?

JLGO · 12-05-2017, 08:51 AM

Quote:

Originally Posted by Scottiemac

What is needed to swap a z28 diff into an SS? Axles? Driveshaft? And yes the differential. Leaning towards this over 1le. Both are 3.91 and it shows on the GM online #23172756. The 1le is discontinued from GM but the z28 is still on line with that number and reasonable. I'm investigating what is needed to do this or just regear what I have. I have a new 3.91 gear set. Online parts says it doesn't fit my 2015 SS. That's not what I've been told but looking for input. Thanks

The GM 3.91 gears should be the same for all gen5 v8s.

Scottiemac · 12-05-2017, 10:15 AM

I decided to use the gears I have for now and rebuild another SS diff with the 3.91 gears I already have. I've been told that the z-28 diff is basically a SS diff with a tru trac and cooler. ZL-1 is more $ but stronger. i hope to do that in the future.

Punisher_ATX · 12-05-2017, 10:26 AM

The z28 diff is not that strong. We already broke one in a bone stock daily driven z28 and the second one already groans and pops. They are NOT suited for a daily driven car.

05-22-2017, 10:14 AM	#1
Scottiemac Drives: Black 2015 1ss/rs Join Date: Mar 2016 Location: Philadelphia Posts: 354	Z28 diff swap. What is needed to swap a z28 diff into an SS? Axles? Driveshaft? And yes the differential. Leaning towards this over 1le. Both are 3.91 and it shows on the GM online #23172756. The 1le is discontinued from GM but the z28 is still on line with that number and reasonable. I'm investigating what is needed to do this or just regear what I have. I have a new 3.91 gear set. Online parts says it doesn't fit my 2015 SS. That's not what I've been told but looking for input. Thanks

05-22-2017, 08:46 PM	#6
Dirty Harry Drives: 2015 Summit White 1SS/RS M6 Join Date: May 2016 Location: Clovis, Ca Posts: 7	I'm pretty sure 23172756 is the torsen diff itself (no housing), while 23172755 is a complete diff assembly. I'm unsure on axle and DS needs. From Pace Performance complete Z28 diff assembly: http://paceperformance.com/i-1999112...al-module.html JDP Motorsports does complete SS diff assemblies: http://www.jdpmotorsports.com/manufa...-ss-jdp-dt1001 __________________ 2015 Summit White Camaro 1SS/RS LS3 Magnasun Heartbeat, MGW Flat Stick, MRR 228 20x10 +35, 285/35R20 Michelin Pilot Super Sport, 1LE Splitter, High Wing, Rexing V1P Gen 3, AeroForce Interceptor

12-04-2017, 09:16 PM	#8
sixty9fordkiller Donkey Dick Cam Camaro Drives: 2010 2SS/RS LS3 M6 Join Date: Oct 2009 Location: Los Angeles, CA Posts: 1,998	did you ever find out if the driveshaft and axles/hubs need to be changed? __________________ Bone Stock

05-22-2017, 10:21 AM	#2
Firefighter Drives: Black '13 2SS/RS/1LE w/NPP/NAV Join Date: Oct 2012 Location: Tampa by way of Miami... Posts: 4,934	What's it going for? It would be drop in and warrantied. Might be a viable option. Sent from my SM-G935V using Tapatalk __________________ My Build Thread... http://www.camaro5.com/forums/showthread.php?t=285054

05-22-2017, 11:03 AM	#3
Scottiemac Drives: Black 2015 1ss/rs Join Date: Mar 2016 Location: Philadelphia Posts: 354	The # I have is 23172756 and two GM sights are around $1100. If it's still available and a drop in without changing driveshaft I'll spring for the original axles but if I would need to change driveshaft, axles and hubs I may just redo mine.

05-22-2017, 12:56 PM	#5
Scottiemac Drives: Black 2015 1ss/rs Join Date: Mar 2016 Location: Philadelphia Posts: 354	Does anyone have the part# off their z28 rear. I've been told two different numbers both listed as differential assy z28. 23172756 and23172755. Quite a difference in price. Maybe 23172756 is the center section and the 23172755 is the complete? Still looking for answers.

05-22-2017, 10:12 PM	#7
Scottiemac Drives: Black 2015 1ss/rs Join Date: Mar 2016 Location: Philadelphia Posts: 354	Thanks for the info. I prefer a drop in diff but if for the cost of axles and hubs maybe a driveshaft I'm getting too close to the zl1. Which if I had to spend that much I would much rather have a zl1 diff. I thought that one # was awful cheap. GM parts direct never clarified it.

12-05-2017, 10:15 AM	#10
Scottiemac Drives: Black 2015 1ss/rs Join Date: Mar 2016 Location: Philadelphia Posts: 354	I decided to use the gears I have for now and rebuild another SS diff with the 3.91 gears I already have. I've been told that the z-28 diff is basically a SS diff with a tru trac and cooler. ZL-1 is more $ but stronger. i hope to do that in the future.

12-05-2017, 10:26 AM	#11
Punisher_ATX Drives: 2010 SS Join Date: Jun 2015 Location: Austin Posts: 439	The z28 diff is not that strong. We already broke one in a bone stock daily driven z28 and the second one already groans and pops. They are NOT suited for a daily driven car.