Bobby_Lee Posted August 3, 2010 Share Posted August 3, 2010 74 260Z with R180 3.54 Swap to R200 3.90 with an OBX Before I even purchased the OBX and before I did the swap I read every topic I could on it. Bought all of the parts needed for the swap. Checked and fixed the "backwards from the factory" gears. Changed the washers and installed them the same as cygnus had in his. Had the OBX, backlash, and new (expensive) side bearings installed professionally. Everything fit as it should as well as the axles from a 280 with an R200.(Aside from my pinion flange that I had to change) Using Redline fluid. Sounds fine on acceleration. Under deceleration loud grinding noise. As soon as I relieve the deceleration pressure the noise goes away. Just from this description what do you think? Could it be one of the axles sits too far in? Or am I off base? I'll be removing it this weekend but hoping someone has some magic dust I could get to make it better.......... And as always thanks ahead of time Bobby Quote Link to comment Share on other sites More sharing options...
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