V6 Passat and V6 Audi owner here. if you want a V6 with a 5 speed, there's a lot more to it than the engine and transmission. the exhaust is doubled (two sets of pipes, two catalytic convertors, 4 O2 sensors), the ECU is different, etc. you'll drop less money on a used engine for your 1.8t, and there's loads more HP and torque you can get out of that motor than you can with the V6.

so how'd you lock it up? timing belt break?