What are you guys doing for an overdrive setup?

Im also in the 200r4 camp. Doing mine this winter. I'd do a real stout 200r4, or the 4l80 with your power level.

My problem with the a500/a518 is that they are a OD unit bolted on the back of a 3 spd, not an actual 4 spd like many others. More weight, and more moving mass going down the road...

Someone here on FABO posted his pre/post ET's with the same car, same tune, same gear and exact same converter used from a 904 to a A500... Even with the lower 1st gear in the a500 he had the EXACT same 60', then slowed down 4mph, and almost 4/10ths overall... talk about parasitic loss...

I also agree that the GV unit just isn't that much OD for the cash...

joe