the last week i was the same problem to you men i have a skyline gtr r33 and i chance the oem clucth for to put a hks twin plate, and mi mechany put a oil in mi gear box motul ATF gear box the colors was red, when i was in the drag racing and i was running mi firts race the gear box transmission don't take the 1,2,3,4,5 speed i don;t know what happed, but i need to way like 1 hours for to move the car, later the car don't take the 3 and 4 gear the syncro was damage..!and right now was to need a buy a other transmission gear box here and mi country dominicain republic i have the only one gtr r33 , and i search a others transmission gear box but is for the gtr r32 i have a questions to you is the same a gtr r33..? i know there i need to chance the clutch because the gtr r32 early model is push type and mi car gear box gtr r33 is pull type i only wanna to know if is diferent... and what type of oil there really need to put in mi transmission gear box, right know a chance and i put the oil motul 75w90 gear box, and what type of oil used the DIFFERENTIAL is the same of gear box oil...? or is diferent thanks for all and help me about this problem........