Is there a difference between SS and Z/28 diffs? Can you buy and fit a Z/28 diff? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Camarosrock · 12-13-2015, 06:37 AM

Hi everyone! I was wondering if there is a difference between the Z/28 diff, and that of a normal SS. I seem to recall reading somewhere here that the two diffs were indeed different. I know the Z/28 has a helical system - does the normal SS have a clutch type diff?

I also recall reading that the Z/28 diff is a restricted part, ie you can only buy it if you actually own a genuine Z/28. Is that correct / still the case?

Thanks in advance for any help!

Synner · 12-13-2015, 06:10 PM

Z/28=Helical, 3.91, diff cooler
vs
SS=clutch, 3.45 or 3.23, no cooler
vs
1LE=clutch, 3.91, no cooler

People have been getting the Z/28 parts, you just may have to do some calling around.

Camarosrock · 12-15-2015, 02:11 PM

Thanks for the infos!

Camarosrock · 12-18-2015, 03:33 AM

btw, would the Z/28 diff fit in a normal SS without any modifications? Is it a straight swap, would it mate to the halfshafts, or do you have to do some other modifications? I heard for example that the ZL1 diff requires modifications for the exhaust manifold due to clearance.

ggionyae · 12-18-2015, 08:25 PM

that right,you just may have to do some calling around.thanks

AG1LE · 12-18-2015, 08:36 PM

Yes, it's a straight swap, except you would need to get the plumbing for the diff cooler (if that matters to you). I looked at this option, and decided it was more cost effective to install a TrueTrac in my 1LE differential.

12-13-2015, 06:37 AM	#1
Camarosrock Drives: None anymore, sadly Join Date: Aug 2010 Location: Europe Posts: 22	Is there a difference between SS and Z/28 diffs? Can you buy and fit a Z/28 diff? Hi everyone! I was wondering if there is a difference between the Z/28 diff, and that of a normal SS. I seem to recall reading somewhere here that the two diffs were indeed different. I know the Z/28 has a helical system - does the normal SS have a clutch type diff? I also recall reading that the Z/28 diff is a restricted part, ie you can only buy it if you actually own a genuine Z/28. Is that correct / still the case? Thanks in advance for any help!

12-13-2015, 06:10 PM	#2
Synner Drives: cars Join Date: May 2011 Location: Oversneeze Posts: 4,542	Z/28=Helical, 3.91, diff cooler vs SS=clutch, 3.45 or 3.23, no cooler vs 1LE=clutch, 3.91, no cooler People have been getting the Z/28 parts, you just may have to do some calling around.

12-15-2015, 02:11 PM	#3
Camarosrock Drives: None anymore, sadly Join Date: Aug 2010 Location: Europe Posts: 22	Thanks for the infos!

12-18-2015, 03:33 AM	#4
Camarosrock Drives: None anymore, sadly Join Date: Aug 2010 Location: Europe Posts: 22	btw, would the Z/28 diff fit in a normal SS without any modifications? Is it a straight swap, would it mate to the halfshafts, or do you have to do some other modifications? I heard for example that the ZL1 diff requires modifications for the exhaust manifold due to clearance.

12-18-2015, 08:25 PM	#5
ggionyae Drives: camaro Join Date: Dec 2015 Location: CA Posts: 2	that right,you just may have to do some calling around.thanks

12-18-2015, 08:36 PM	#6
AG1LE Drives: '14 1LE Join Date: Nov 2013 Location: NJ Posts: 2,438	Yes, it's a straight swap, except you would need to get the plumbing for the diff cooler (if that matters to you). I looked at this option, and decided it was more cost effective to install a TrueTrac in my 1LE differential.