pintovit wrote:Now one question... The "new" diff is a little different. I never thought there were several diff models for the z32 TT but apparently there are. Mine has a vacuum line going into it and the one I found doesn't. Does any one knows what's that for?
First off, gorgeous Z (or is it Zed there?

). Love the shaved wiper and antenna. I do plan on doing both to mine if/when I do bodywork.
Second, the hard "vac line" is probably a breather port, to allow pressure to vent from the diff. Any pictures? IIRC, the euro-spec (which your car appears to be) Z32s had a differential fluid cooler.
Diff bushings will add slightly more vibration to the cabin, but it does no harm (other than you not liking it.). Red vs black are no difference, just a change in color. That is, if they're both ES, I know Nismo makes diff bushings, but I don't know the differences in durometer between the two brands. If you haven't replaced your driveshaft yet, it's possible that is the cause of you driveline noise. A one piece driveshaft may alleviate that. The center bearing goes bad in the OEM driveshaft over time.
Tension rod bushings would have been my diagnosis on the front end vibration as well. If replacing those hasn't helped, have you replaced the steering rack bushings? Other than that, you've done everything I can think of for front end vibrations. I think you've done everything in
this post, but just in case, I've linked to it.
I don't agree with the fuel line set up you've run, but as long as it's not leaking for you now, or rubbing anywhere is shouldn't be, then rock on.
Wish I saw this post years ago, could have saved you some headache on the Goodridge lines.

It's apparently only a few cars they suck at, because my DD lines (Corolla) are great, with no fit issues per my mechanic. Just so happens the Z32 is one of those cars.
I briefly looked into the Nitron coilovers, and they look amazing. And amazingly expensive. If I may suggest other alternatives for you to consider, Powertrix is running a group buy sometime this spring on their coilovers. They're an excellent product, and won't break the bank. The SS (sport street) model can be had for under $900USD. I run the SPL coilovers, which run about $1100, and they are fantastic. I see the Nitron product as more of a track-use set up. Great product, but perhaps overkill for the street. SPL and Powertrix also sell all the adjustable links for our cars. IMHO, SPL is the best, with Powertrix being a close second.
Again, great looking car, glad to see your work you've put into it.
