Swap NISMO 7A differential with my original 2009 7A diff?

jchammond

My 11’ Auto had an open RC33 from the factory; later added a Quaife...better traction.
Cruise would max out at 90/3000rpm’s.
I later swapped pumpkin with a 13’ Nismo, that had the 3.69 gears & it was a direct swap~ as my stub shafts were threaded & so were the 13’ model.
Speedometer was dead on still; as speed reads off the output stub shafts toner ring sensors...Cruise control would work normal; until the tachometer would get near 3k & speed wouldn’t be near 90...then it would go off & cruise light would flash.
After cycling ignition/ everything was normal again.
Just be prepared to recycle ignition if you blast it down the road....even if you don’t have cruise set/ somehow it will recognize a speed vs rpm fault.
Never checked into weather or not a tuner could reprogram ecu for this

__________________
MazWorx built long block | FI-TT-100 Stage 2.75 | IPT built 7A/T

http://www.the370z.com/members-370z-...s-musings.html

CrunchyCajun

Your cruise would hold set speed normally and accurately up to 90? Normal and accurate are the main things I was concerned about.

jchammond

Stock diff (RC33) it would hold speed steady to 90@3000rpm’s,
After swap, I’d have to look back & see...but would only cruise around 75, as rpm’s approched 3,000 & would kick off.
Could be a program to fix/ as the RC36(3.69) diff is factory in the Nismo A/T’s 15’ & up

__________________
MazWorx built long block | FI-TT-100 Stage 2.75 | IPT built 7A/T

http://www.the370z.com/members-370z-...s-musings.html