I took a b16 gear set, and put an ls 5th gear set on it, threw it in the case with a gsr diff. it spins freely on the ground, when i put it in you can spin one wheel at a time and the other one spins backwards like it's suppose to. but when you try to spin them both it is locked up.


does any one know what the problem could be?

the diff is properly shimmed,
all the gears all shift fine,
and the gsr has the same final drive as the b16 so I was told that they would work together.

if anyone has any ideas let me know