So I did the swap to 4.10’s about a week ago and now it shifts harder. Even barks the tires on the 1-2 upshift at part throttle. Other than the harder shifting everything is normal. I prefer the hard shifting but is it normal to shift harder.

Only mods to the trans that I have are a servo and bump in line pressure with a Hypertech.

 

when i did my gear swap (only 3.73 so far) it felt like it shifted harder to me. same as you described. i lowered the line pressure and it shifts about like it did with the 42's.

 

Welcome and love the TQ. Its rare in 4.8's. lol j/k

 

Everyone knows the 4.8 is just as good, if not better then the 5.3.

 

Philip S.

 

Yes, commonly if you move to a numerically larger gear, the shifts firm up.