UPDATE:
Got the 3.73 differential in. Installed new flanges from a Camaro 3.27 lsd. GM also thought it was a good idea to make the 3.73 SS diff Companion Flange bolts mount up just a little bigger then the already existing 3.27 Companion Flange that connects to driveshaft. We made it work. Just carefully notched out the holes and cut a little off the guides where the bolts go into the Companion Flange. Made sure it was centered. Overall very please with results. I noticed 2/3 miles per gallon better gas mileage and don’t have to down shift when passing cars, and going over the skyway bridge. Big bridge. Lol
Matt and myself figured out what needed for the ATS to get the 3.73 swap. If you have a Camaro and want to upgrade to a 3.73 it’s a lot easier then the ATS. Camaro 3.27 flanges swap easy into the 3.73. If you want to upgrade the to SS CV axles just buy SS CV axles. The spine on the Camaro’s 2.0 and SS have 33 spline. They fit right in. You could also upgrade the flanges on your 3.27 to SS Flanges and the SS CV axles will work. The 3.27 flanges won’t mount to the SS CV axles. 3.27 flanges are a smaller diameter then the SS flanges. These differentials are hard to come by.
As for the ATS you can install the 3.73 just keep in mind the flanges don’t interchange. You have to get flanges from the 3.27 manual camaro 2.0. Buy the flanges separately to swap to SS 3.73 successfully. You can use the same CV axles as stock or the manual cars CV axles (there thinker then auto’s) but you CANT upgrade ATS to SS CV axles because the ATS has a 30 spline count and they won’t fit. So we spent half the day seeing if SS axles will fit the ATS, took a trip to Tracy Lewis shop and took apart a v6 differential. That’s totally different beast...😆. So in order to make it work, I ordered some flanges for the Camaro 3.27 manual to make this work. I heard many talk about this subject but never shared properly with others. It was something that’s been throw out there a few times and now it’s clear what needs to be done for the ATS to get a 3.73 SS differential. These differentials all mount the same way in ATS, camaro’ 2.0, and SS 6.2 manuals. We figured it out. Hope this helps anyone that’s looking into it.
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Got the 3.73 differential in. Installed new flanges from a Camaro 3.27 lsd. GM also thought it was a good idea to make the 3.73 SS diff Companion Flange bolts mount up just a little bigger then the already existing 3.27 Companion Flange that connects to driveshaft. We made it work. Just carefully notched out the holes and cut a little off the guides where the bolts go into the Companion Flange. Made sure it was centered. Overall very please with results. I noticed 2/3 miles per gallon better gas mileage and don’t have to down shift when passing cars, and going over the skyway bridge. Big bridge. Lol
Matt and myself figured out what needed for the ATS to get the 3.73 swap. If you have a Camaro and want to upgrade to a 3.73 it’s a lot easier then the ATS. Camaro 3.27 flanges swap easy into the 3.73. If you want to upgrade the to SS CV axles just buy SS CV axles. The spine on the Camaro’s 2.0 and SS have 33 spline. They fit right in. You could also upgrade the flanges on your 3.27 to SS Flanges and the SS CV axles will work. The 3.27 flanges won’t mount to the SS CV axles. 3.27 flanges are a smaller diameter then the SS flanges. These differentials are hard to come by.
As for the ATS you can install the 3.73 just keep in mind the flanges don’t interchange. You have to get flanges from the 3.27 manual camaro 2.0. Buy the flanges separately to swap to SS 3.73 successfully. You can use the same CV axles as stock or the manual cars CV axles (there thinker then auto’s) but you CANT upgrade ATS to SS CV axles because the ATS has a 30 spline count and they won’t fit. So we spent half the day seeing if SS axles will fit the ATS, took a trip to Tracy Lewis shop and took apart a v6 differential. That’s totally different beast...😆. So in order to make it work, I ordered some flanges for the Camaro 3.27 manual to make this work. I heard many talk about this subject but never shared properly with others. It was something that’s been throw out there a few times and now it’s clear what needs to be done for the ATS to get a 3.73 SS differential. These differentials all mount the same way in ATS, camaro’ 2.0, and SS 6.2 manuals. We figured it out. Hope this helps anyone that’s looking into it.
