I have the 8sp automatic, the difference was night and day going from stock 4.10 to 4.56 with 35's. The gearing brought the power band back to being usable and seeing 8th consistently on the highway.@syreeves
I think @OMTBiker and @Golvach hit it spot on even though I have the auto.
I made a small somewhat review in this thread below. I know it will go in 8th at 45mph and I can actually roll on the skinny peddle and it will accelerate without downshifting.
once I get 500 miles and change the gear oil I plan to pull my 16’ tandem with a light load maybe around 2k lbs and see difference. I don’t tow much but a zero turn, utv or both.