G8 GT Rear End Swap - LS1TECH



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G8 GT Rear End Swap

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Old 10-03-2011, 06:10 PM   #1
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Cool G8 GT Rear End Swap

A couple of friends and I installed a 2010 Camaro 3:27 differential over the weekend in my G8.

The swap is worth the effort for performance and reliability.

I selected the 3:27 gears because I'll be installing a blower in the future and from what I've researched, a 3:45 or more gear blows the tires off.

The car certainly feels lighter and I'm pretty sure will improve my 60' times.

The swap took us about 4 hrs. and I already had the bushings installed in the differential.

Any questions you have about swap, just ask away.
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Old 10-03-2011, 06:14 PM   #2
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Cool. How much did the whole project set you back?
Was the unit from a Camaro SS and does it matter what year 5th gen you get?
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Old 10-03-2011, 07:25 PM   #3
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I had about $ 575.00 in the gear and $ 70.00 for the BMR bushing kit.
The gears need to come from a 2010-2011 V8 Camaro / Automatics (make sure it is factory tagged as LSD 3:27 differential)
I believe only 3:45 gears only come in the models with a stick shift.

Last edited by G8RAM; 10-03-2011 at 08:06 PM. Reason: Additional Info
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Old 10-03-2011, 10:02 PM   #4
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nice swap i'm on the fence about my gear selection since it will def be awhile before i can get a blower. everything helps though lol i d alot of hwy driving also. glad everything went like its supposed to let us know if 60s drop any
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Old 10-03-2011, 10:13 PM   #5
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is a tune required?
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Old 10-03-2011, 10:22 PM   #6
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Originally Posted by williamGT View Post
is a tune required?
Yes, you will need to retune the transmission.
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Old 10-03-2011, 10:40 PM   #7
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Originally Posted by Steelo00GT View Post
Yes, you will need to retune the transmission.
Thanks....something I'll look at in the future.
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Old 10-04-2011, 09:22 AM   #8
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I agree with the OP even if you put on wider tires the car can't handle it with a blower.

At what point will your car be faster if you put in a higher gear due to less traction loss?
At what point will be become slower again as you don't have enough mechanical advantage?
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Old 10-04-2011, 04:31 PM   #9
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These heavy bitches need gears or a stall or both to cut any decent 60' times. My best so far on 275 Nitto street tires is 2.04 with no wheel spin.
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Old 10-05-2011, 10:53 AM   #10
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I've got 618 to the wheels with a blower and 3.70. Launches real well with 10.5 slicks.
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Old 10-05-2011, 12:02 PM   #11
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I've got 618 to the wheels with a blower and 3.70. Launches real well with 10.5 slicks.
Agree, people launch blown cars with 1,000hp with no problems on the correct tire. Actually I've seen them go down the track on a 275 radial...

Quote:
Originally Posted by G8RAM View Post
A couple of friends and I installed a 2010 Camaro 3:27 differential over the weekend in my G8.

The swap is worth the effort for performance and reliability.

I selected the 3:27 gears because I'll be installing a blower in the future and from what I've researched, a 3:45 or more gear blows the tires off.

The car certainly feels lighter and I'm pretty sure will improve my 60' times.

The swap took us about 4 hrs. and I already had the bushings installed in the differential.

Any questions you have about swap, just ask away.
Nice, I've done the Camaro rear swap into the G8 about 5 times now and have it down to about an hour and a half. I've also done the Driveshaft Shop 9" conversion which the ultimate upgrade. The Camaro rear is a decent upgrade and you notice the size of the Camaro rear next to the OEM G8 diff. I would always go with the 3.45's but even the 3.27's, just put a real tire under the car and you wont have any traction problems.


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Originally Posted by 2002_Z28_Six_Speed View Post
I agree with the OP even if you put on wider tires the car can't handle it with a blower.

At what point will your car be faster if you put in a higher gear due to less traction loss?
At what point will be become slower again as you don't have enough mechanical advantage?
Sounds like whoever has issues needs real tires and suspension upgrades! There are numerous people launching 600+hp cars with 3.70+ gears with no problems. The toe, trailing, and control arms need to be upgraded to take the movement out when launching. You can see the tire move back with the stock arms/bushings, if you cant keep the drivetrain straight then of course your going to have traction problems.
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Old 10-05-2011, 12:59 PM   #12
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Quote:
Originally Posted by G8RAM View Post
I had about $ 575.00 in the gear and $ 70.00 for the BMR bushing kit.
The gears need to come from a 2010-2011 V8 Camaro / Automatics (make sure it is factory tagged as LSD 3:27 differential)
I believe only 3:45 gears only come in the models with a stick shift.
575$ Just for the gears or the center section also?
Did you install the gears in the center section if so?

I wonder if i wanted the 3.45s could i use the gears from a manual camaro in my automatic G8...
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Old 10-05-2011, 02:08 PM   #13
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Originally Posted by Gordon0652 View Post
I wonder if i wanted the 3.45s could i use the gears from a manual camaro in my automatic G8...
Yes you can. It bolts in the same way. You'll just need
a TCM tune.
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Old 10-05-2011, 07:15 PM   #14
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Gordon,

The entire differential was $ 575.00 plus the price of the BMR bushings.
Of course you will need a tune too.
My tuner had it completed in about 5 minutes and it's spot on.

Thanks,
Ron
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Old 10-06-2011, 12:15 PM   #15
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I've had the 3.45 Camaro Diff Swap in my G8 for about 4 months now. It's a great mod!

As for putting just 3.45 gears into a G8 Diff, that won't work. You need the whole Carrier/Pumpkin/Differential from a Camaro, whatever you wanna call it.
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Old 10-09-2011, 03:09 PM   #16
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Quote:
Originally Posted by SLOW SEDAN View Post
Sounds like whoever has issues needs real tires and suspension upgrades! There are numerous people launching 600+hp cars with 3.70+ gears with no problems. The toe, trailing, and control arms need to be upgraded to take the movement out when launching. You can see the tire move back with the stock arms/bushings, if you cant keep the drivetrain straight then of course your going to have traction problems.
Some day, some day. Just at the moment I have other interests.
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Old 10-24-2011, 05:23 PM   #17
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Is there a noticeable difference in acceleration? Any videos of the car running after the swap. Would be interesting to see a nice sticky note made from detailed information about the swap
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Old 10-24-2011, 10:23 PM   #18
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Quote:
Originally Posted by marc97taws6 View Post
Is there a noticeable difference in acceleration? Any videos of the car running after the swap. Would be interesting to see a nice sticky note made from detailed information about the swap
Very noticable difference in my opinion.

Go to youtube and search rawyzf. You'll see my videos of me testing the TCM files, and notice if you think there is a difference. I also have a few vids from the 1/4 a few weekends ago.
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Old 10-31-2011, 05:11 AM   #19
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Were any modifications required? Did the stock drive shaft and axles mount up? What all did this entail other than just dropping the old diff out, installing the new diff and tuning the transmission? The more information you can give the better. I hate to ask stupid questions but I always like to err on the safe side before attempting a mod/swap. Thanks.
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Old 10-31-2011, 06:13 AM   #20
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I had the 3.45's in my g8 and I didn't really like them with the blower. I would have rather had the 3.27's and should have waited to find them instead of the 3.45's. Its correct that it blows the tires off immediately. I had an unfortunate mishap at the track with my camaro rear. On my second pass with that setup it hooked really hard and broke the rear mount off the rear end cover. Had to be towed off the track, I put the 2.92's g8 rear back in and still like it better then the 3.45's. So, don't know if the mount was damaged when it got shipped or if it happened when the car wheel hopped for the first time ever on the first pass. I'm guessing number 2.
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