Leaderboard

I suspect that JAlex's problems may be the result of poor local fuel quality combined with local high-temp conditions. Not sure that any of us are qualified to provide proper guidance on that combination. Maybe not even Nissan. It may prove difficult to find qualified tech help in Panama. That said, I hope the new mechanic proves to be up to the task and this will end with JAlex piloting Panama's best Z on his local streets and highways.

Since you're in experimentation mode and you have fabricating skills, you might remove the factory mount and fab up a new mount that gives the desired angle. It wouldn't need to be super strong or made for permanence if you're only evaluating cruising speed. Keep the strap in place in case of breakage. It could be a solid mount. If the angle is perfect but the vibration is the same, then you can start looking elsewhere. The RTz mount either gives a certain angle with the GM mount, or it gives a range of angles in use with the snubber, as the diff nose moves up and down. The GM version is an actual mount, the snubber version is essentially a solid strap. p.s. have you considered mounting a camera under the car to see what the diff nose is doing while driving? Maybe something is moving. Or, looking back at your pictures of the crossmembers, why don't you just shim the crossmember mount downward with some washers. Perfect the angle, take it for a drive. then you'll know if you should go further.

North South it’s still Carolina!!😂

Thanks @Patcon I had not seen that before. It's on order. If heat is a problem maybe we can get a 2fer😃

Hahahaha!! I've been called worse than stickler as well. And that was just today!! 😄 I'm confident with your attention to detail, that stuff I noticed has already been addressed, or will be in the near future.

Bottom line that’s not the way the engine was designed unless he thinks you had a defective thermostat.

You could look at the RT mount and customize the diff angle

A few months ago, I created a differential cover to go with the KAAZ LSD I installed last year. I finally got around to installing the cover and as fast as I filled it, the gear lube leaked out. I'll pull the cover and see if I can figure out what I did wrong but for now, I'm going back to the original cover for now. I'm guessing there is a problem with the mating surface. I'm not necessarily posting for advise as much as I need to vent. Hopefully my other little projects worked out better so I can get my Z back on the road. Other projects I'm finishing up include a freshly rebuilt 5-speed, oil pan gasket to stop the oil leaks (I hope), DIY engine splash shield, and fabricating plastic inner fender covers.