I not the biggest fan of any nolathane/poly type bushes but it was easy to install without removing the whole subframe and Nolathane was the fastest available option in NZ. It previously had some blue bushes that had disintegrated which I assumed were superpro (so didn't want to get them again).
It could quite possibly be a combination of a lot of old bushes, but I didn't want to just chase bushes randomly (will do the lot if I can't track down the issue though). The bushes have been checked over multiple times looking for anything with excess play, unfortunately it's near impossible to recreate the acceleration force on the hoist. It seems most people who are getting axle tramp issues are told to check/replace the subframe bushes.
I've just brought alloy subframe locker collars and tried fitting but appears they don't work correctly with the nolathane bushes. Outer hicus do have minor play so i'll replace those while the ass end is in bits.
R32 GTR, coilovers (fairly low), whiteline front and rear sway bars/links, alignment set by a shop who was recommended for performance cars.