Originally Posted by BigBlueLump76

LS3 and 6L80e, currently with 3.54 open diff.

​​​​​As mentioned, it's not unhappy but at around 85mph it starts wining a bit and I generally expect the tranny to react to downshifts faster. I'm thinking both issues can be rectified with a slightly taller final drive that's closer to what the 6L80 expects since it was programmed for a 3.27 rear end in the donor Camaro SS.

Originally Posted by LT1 jaguar

It would probably be cheaper to have your PCM tuned for whatever gear ratio you want to use.

Dave

Originally Posted by slofut

Point taken Jagboi, that's why this last time I started with only setting the pinion depth and starting with the pinion set deep, that way as I moved it out in increments and taking patterns I could see what it was doing. As I moved past the starting depth of 2.624 (etched into the face of the pinion) it was looking pretty good but still a bit high so I kept going. I think I have room to go one more step before I give in, I'm stubborn, I really hate to let this beat me, I had one pattern where my diff guy said "you could prob run that" but neither of us was really happy with it. Darren, I think I'll prob take your advice if this last try doesn't work out. My diff guy here is the one that everybody uses and he's a good friend, but he's so busy with big stuff I hated to bother him with it.

Originally Posted by LT1 jaguar

Follow up after you get it on the road and let us know how it sounds (or doesn't) and what you think.

Dave