I have a b16a2 with a b16 trans I have recently swapped the trans and drove the car for about 50-60 miles and all was good car drove great, I was driving around and the gave me a little hiccup in 5th, thought i had just hit a bump, stopped the car started out in 1st and at 3-4k rpm it’s started jumping so I go through all the gears and everytime at 3-4k rpm the car just starts jumping but after u get past the 3-4k rpm range it’s fine and drives smooth