-Make sure you drive it at 45 mph+ to make sure it goes in 4th gear.
i dont think my gfs 01gtp has a 4th gear. was it still problematic in the 01s? the rpms never drop or raise when going from 3 to drive or drive to 3 and it never feels like it shifts out. but the rmps only get to about 3k at 70 down the road