Forced Induction & 7AT 370z Info

Tractionless · 05-17-2024, 09:47 AM

Quote:

Originally Posted by SG4247

Just an update on this transmission swap. Pretty happy with it overall, but it has some quirks that are frustrating, much like the VQ version.

The biggest one is:
I occasionally get a rough 4-3 down shift when stopping hard in D.

So, I will be researching this issue and report my progress.

Odds are good it’s a VB shift valve or solenoid issue, but not sure yet.

I swapped over the entire VR valve body with solenoids and employed the Z's TCM. My 3-4 shift is still harsh (had this problem with the OE Z trans) and now so is the 4-5. I'm leaning toward needing a new Z TCM as stated above the valves were swapped from the VR.

All downshifts are much tighter and no more driveline "slop" that felt like a blown mount or bushings.

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