G8 GT Rear End Swap
11-01-2011, 07:32 PM
#21
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.
11-02-2011, 06:06 PM
#22
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As said earlier; no additional parts are needed but......it's an excellent time to change the cradle bushings while you have it torn apart.
After market bushings are much better than factory quality and help reduce wheel hop.
After market bushings are much better than factory quality and help reduce wheel hop.
11-24-2011, 10:10 AM
#26
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Tuning New Gears OP HERE,
I've seen a lot of comments, on several forums that tuning new gears is difficult.
I mentioned that to my tuner and he looked at me like I had three heads!!!!
Using HPTuner, he completed the tune is less than 5 minutes and it was spot on.
I checked miles per hour with my GPS and it was perfect.
He had to enter the tire size, and new gear numbers. Computer automatically made 103 changes to my setup.
As usual it comes down to the knowledge of the tuner.
Good Luck!!!
I've seen a lot of comments, on several forums that tuning new gears is difficult.
I mentioned that to my tuner and he looked at me like I had three heads!!!!
Using HPTuner, he completed the tune is less than 5 minutes and it was spot on.
I checked miles per hour with my GPS and it was perfect.
He had to enter the tire size, and new gear numbers. Computer automatically made 103 changes to my setup.
As usual it comes down to the knowledge of the tuner.
Good Luck!!!
02-01-2012, 01:44 PM
#27
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Just curious. I have a 2009 G8 GXP, just wondering if the 3.45 gears from the Camaro will work with my differencial or if I need to have the whole Carrier/Pumpkin/Differencial?
02-01-2012, 01:54 PM
#28
Do you have the 3.70 or 3.27 gears in the GXP?
02-01-2012, 04:23 PM
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02-01-2012, 08:13 PM
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I started off with 2.90 of course, upgraded to 3.27 then upgraded again to 3.70 with a Harrup Truetrac. The 3.27 were great for the street but once I went to slicks I felt the 3.70s were a necessary change. Trans tune for new gears is simple, you just have to change the ratio and shift points. A decent tuner can do it real quickly.
02-02-2012, 08:26 AM
#33
3.27 to 3.45 isnt much of a jump. But, if you decide to change internal gears within the pumpkin your options are a ton better with the 3.45 carrier. I don't know of anyone making gears for the G8 Diff, but there are a ton for the Camaro.
02-02-2012, 02:29 PM
#34
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