Deceleration Vibration

[ZoomZ]

I did a quick forum search and I did get some results, but didn't find a definative answer. (close)

Over the winter I had Transmission off. So drive shaft was off. 100% sure Drive shaft was installed in factory bolt positions.

I installed Vibra-Technics rubber enigne mounts. I also had previously installed Torque solutions Poly transmission mout,

Installed solid bushings in shifter control arm.

Decelerating from high speeds 80mph, 100mph and around there, I get a vibration/noise and a feel like a "backdrag".

New tires also installed and definately not coming from wheels. Alignement was also done.

I am leaning towards one of the new mounts. More so the stiffer poly transmission mount.

Since I had already had installed the Poly tranny mount, I didn't get an opportunity to match set with engine mounts.

so my question is: Which mount is more suspect of causing this type of NVH?

By mixing the two different brands/types, is that my real issue?

Ultimately, I think I will buy the matching Vibra-Technics rubber transmission mount (just to be matched) and eliminate any type of defelection.

https://www.vibra-technics.com/nissa...t_complete_kit

TIA

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