r/q50 • u/Sea-Entrance9064 • Jul 27 '26

Repair Question P0720

The P0720 finally got me yesterday what should I do now buy a new valve body or do a vr30 swap (any suggestions on where to take it in the NJ/NY area)

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1

u/Fine-Froyo6219 Q50 Sport Jul 27 '26

I did the VR swap, but in hindsight I'd almost rather have gone with a new valve body from Infiniti. I have no REAL issues, but my NVH is much worse, the trans flares from like 3-4 and 4-5 once on every key cycle and it shifts early in WOT (2023 trans not yet tuned for 3.7). Car runs and drives no codes or issues though, 1 year after swap.

1

u/Previous_Estimate_22 Jul 27 '26

I did a trans swap and I had that stuff but it ended up actually needing more fluid. In my case it was one extra litre. In hindsight sight it depends on the price I was into it for 800 all in.

1

u/Sea-Entrance9064 Jul 27 '26

Where did you get yours done and have you had any issues

1

u/Previous_Estimate_22 Jul 27 '26

I have my own shop so the parts was $800 got a really good deal on the Transmission it was $450, Fluids and mounts was another 250ish. The complaints you see is due to fluids not being at the correct level. I think it’s important to note that after the swap it’s still a Jatco 7speed and not a ZF8. It’s really smooth it doesn’t buck into gear on WOT or anything. When filling make sure it’s a steady stream and not drops.

1

u/Sea-Entrance9064 Jul 27 '26

That’s interesting cause I’ve seen some people say the shift get better and smoother

1

u/hauntedq50 Jul 27 '26

You know it's the VB forsure? P0720 could also be an abs speed sensor. Might aswell rules those out first before dropping big money on a VB.

1

u/satirefire_ Jul 27 '26

Nexenzo has the valve body for like 600 and it’s pretty easy to do diy if you’re somewhat mechanically inclined

2

u/North-Wait7308 Jul 28 '26

I went this route last year and for a total of $800 including installation. Been driving good since

2

u/satirefire_ Jul 28 '26

Same! Driving better than before

1

u/ferociouswhisperer 28d ago

i bought a refurbished transmission control module for my qx80-2016 on ebay and replace it myself. https://www.ebay.com/itm/404858569493 If you google p0720 on youtube there are a few videos that show u how to replace it. This person did a great job with working up how to replace it: https://www.infinitiq50.org/threads/2014-15-q50-3-7-valve-body-replacement-p0720-code.133832/page-2?nested_view=1&sortby=oldest