This is true! The C4 is nice but a C4 with a 2.79 8" rear end is where it's at. When I put in a 2.79 to replace my stock 3.5, the RPMs decreased an avg. of 21.5% in the 50-75 mph range.

Yep, 75 mph! My six would have exploded if I tried that with the stock rear end. It is a great highway cruiser and I rarely gun it from a stop so the loss of power taking off doesn't bother me. Hardly noticeable.

Flex plates can make real nasty noises when they go south and I would consider them a cheap fix. Hope that takes care of it!