fontana dan wrote: ↑Fri Dec 23, 2022 2:13 pm
When I ask what the diff mounts sound like, I'm asking if the poly bushings will transmit any excess noise/vibration/harshness into the cabin.
Would you recommend dropping the rear subframe to do shocks and diff mounts at the same time? It looks pretty straight forward.
However, this driveline business will have to wait until the front end is sorted out. Blown front shocks almost making me feel sea sick on a road trip.
Keep in mind, im not trying to scare you
Tha'ts definitely gunna take a while to fix, I hate to break it to you but unfortunately the Q45 has very very little OEM and Aftermarket support. Not to mention there's very few drivers left, and the cars themselves are almost nonexistent. Luckily NICO forums has made it possible to get everyone in this car community together.
Now, like BadQ45t mentioned and ludeaem, if you want the original feel of the car your going to have to dig deep in the web or across cities in junk yards hoping they can sell and send you the parts you need. Other than that your best best is to convert most suspension parts to those from a 240SX/350z or a R32/R33. Personally, I'm trying to keep as much as the Q45 stuff as possible as they are just much beefier than anything from a different platform. Now if you keep your car stock i would highly suggest keep all original parts but if you are planning on dropping some serious weight on the car. Some BC coilovers and 240SX parts will save you a lot of time and potentially money over getting OEM parts.
Now I would like to address your bushings concern. Yes poly bushings will definitely stiffen your ride and feel of the car. I personally haven't done it to any of my Q's but from different cars I can definitely feel the ride much stiffer and a bit nosier as the stiffer the ride the more vibrations will transfer to the rest of the chassis in the car. Rubber by far will always keep the car ride quieter and smother, but most of that fades away at high speeds. With poly bushings at slow speeds you'll definitely feel a harsher ride, but at higher speeds the car will feel as if it was driving at slow speeds, meaning you can turn at higher speeds without feeling you're going to roll over or slide/skid out.
I would definitely recommend getting your front end fixed first as it can be quite dangerous rocking around in super front heavy car. As for the rear, you can find the sub-frame bushing on the energy suspension website and they also sell the differential bushings. If you're not planning on getting coilovers, or adjustable Front control arms then the tension rod bushings would go great as well. Gabriel does make rear shocks for the car but they are cheap both in price and quality.
With all that said, if you're really committed to reviving your own Q45 just keep in mind redoing the entire front and rear suspension the right way to OEM or Aftermarket will run you anywhere between 4 and 6 grand. On top of that, if you haven't done any work to the motor itself I highly suggest start regularly changing the oil, don't rev the engine much specially if you have OEM engine mounts and don't get me started on the transmission. Also, check all your power steering components. Heat, weather and time at this point in all older cars will cause many problems to any and all gaskets, bearings and bushings. Not saying that to scare you, but I personally really like the car itself, it's been a project car for the past 6 years and I'm barely getting through half of the stuff i mentioned. If you're willing to jump aboard I'm hoping you will share your experience with the rest of us but just keep in mind, 6 grand is a good down payment for a really nice car.