Differential Whine (Revised Factory Diff with Cooling Fins?)

BGTV8 · 03-18-2015, 12:44 AM

I don't recognise this diff housing .... my Z34 (Japan built) has a "smooth" case - I have the finned NISMO diff-cover and I did notice an increase in NVH when I fitted it, and that got worse when I fitted Whiteline bushes - just something else to tolerate (or I just turn the muzak up a bit).

This diff housing looks a bit like the big-bertha (R230) diff in my 300ZX TT which is an amalgam of 5 different cars that my nephew is slowing building into a race-car. Best get the car on a hoist and try and find some identifying marks on the diff case itself to identify exactly what it is.

I'm not sure I like that drain plug hanging down underneath albeit that the exhaust would take a pounding before it was hit, but you never know.

03-18-2015, 12:44 AM	#11 (permalink)
BGTV8 A True Z Fanatic Join Date: Dec 2009 Location: 03350 Australia Posts: 1,516 Drives: 09 Nissan 370Z M6 Rep Power: 39975	I don't recognise this diff housing .... my Z34 (Japan built) has a "smooth" case - I have the finned NISMO diff-cover and I did notice an increase in NVH when I fitted it, and that got worse when I fitted Whiteline bushes - just something else to tolerate (or I just turn the muzak up a bit). This diff housing looks a bit like the big-bertha (R230) diff in my 300ZX TT which is an amalgam of 5 different cars that my nephew is slowing building into a race-car. Best get the car on a hoist and try and find some identifying marks on the diff case itself to identify exactly what it is. I'm not sure I like that drain plug hanging down underneath albeit that the exhaust would take a pounding before it was hit, but you never know. KapitalZ likes this.

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