Ray,  When my first transmission broke I had the shop build another one locally - they went to a G/Z specialist.  The 5AT was built with new internals & seals, a modified torque converter (higher stall), an oil cooler, shift kit and valve body upgrade.  It feels almost exactly like my first transmission - pretty normal most of the time.  Under hard acceleration, sometimes the shifts between 2-3 and 3-4 can be harsh.  Otherwise during street driving it's pretty tame.
It's too hard for me to be able to feel the difference from the carbon fiber driveshaft because my entire turbo system is new. The whole package feels faster than my first FX, but according to the dyno it is more powerful so that's not a surprise. I can tell you there are no strange vibrations - the car feels pretty close to stock in terms of how it runs and feels. I had the stock shaft on my first build and besides feeling a more powerful acceleration on the new build, I couldn't tell you it was any different.
The rear axle CV joints might not like extreme angles but there is nothing you can do about that unless you modify the knuckle or control arm. I guess you could always raise it a bit...
As for wheel hop, that's a new one for me. That's usually because of the suspension setup. The rear axle might play a part in feeling wobbly on launch if the CV joints are binding but I think it is probably the height and dampening settings in your coilovers that would fix the hop. It's possible your suspension can't handle launching that much weight with that much power - BCs might be your problem?
				
			It's too hard for me to be able to feel the difference from the carbon fiber driveshaft because my entire turbo system is new. The whole package feels faster than my first FX, but according to the dyno it is more powerful so that's not a surprise. I can tell you there are no strange vibrations - the car feels pretty close to stock in terms of how it runs and feels. I had the stock shaft on my first build and besides feeling a more powerful acceleration on the new build, I couldn't tell you it was any different.
The rear axle CV joints might not like extreme angles but there is nothing you can do about that unless you modify the knuckle or control arm. I guess you could always raise it a bit...
As for wheel hop, that's a new one for me. That's usually because of the suspension setup. The rear axle might play a part in feeling wobbly on launch if the CV joints are binding but I think it is probably the height and dampening settings in your coilovers that would fix the hop. It's possible your suspension can't handle launching that much weight with that much power - BCs might be your problem?
	



			
			
			


			
			
			



			
			
			