Correct me if im wrong but are'nt GTR bovs just 2 RB20det/RB25det ones?? They look the same on the outside. Do they have stiffer springs?? all these Questions
If you mean 2 Axles from a R31 skyline no. R31 Skylines have 28 spline axles and Pinnys have 25 spline.
Also the left and right axles are different lengths, so no again.
If i have the hand controller plugged in i get all sorts of shit idle, like idling high sometimes. With it unplugged it's great Maybe dissconnect the commander and see how it goes?