Forced Induction & 7AT 370z Info

SG4247 · 04-15-2024, 07:14 PM

Quote:

Originally Posted by shadow85

when doing VR30 swap, is this worth it:

https://sohomotorsports.com/products...smission-mount

OR should I get fab shop to custom make it?

I wouldn’t pay that for something that looks like it was built at a high school welding class.

Tractionless · 05-03-2024, 11:14 AM

Quote:

Originally Posted by shadow85

when doing VR30 swap, is this worth it:

https://sohomotorsports.com/products...smission-mount

OR should I get fab shop to custom make it?

Just modify your own, it's simple.

Tractionless · 05-03-2024, 11:17 AM

Quote:

Originally Posted by SG4247

I wouldn’t pay that for something that looks like it was built at a high school welding class.

You're install is looking good. I did mine on jack stands with the engine in and deleted so many silly brackets holding wires and connectors as they're nearly impossible to reinstall, especially the one at the top of the trans bell housing.

I simply zip tied my O2 wires to others on the sides of the trans. Nissan is guilty of bracket pollution on the transmission!

Curious as to why you shortened the shaft by 3/4" what it calls for 1/2" everywhere.

SG4247 · 05-03-2024, 06:40 PM

On the driveshaft length…

I measured the original driveshaft and just shortening it by 1/2” would be a really tight install on my car. The drive flange was very close to the pinion shaft threads.

Then, after measuring the two transmissions side by side several times it looked like 3/4” shorter would be a little better choice for my 2010 model touring.

I have a 2016 3.69 mt rear diff, with a different than stock pinion angle also. That may be part of it.

SG4247 · 05-09-2024, 08:24 PM

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.

DarkJak · 05-12-2024, 03:39 AM

Godzilla raceworks has the brace and aluminum driveshaft cheaper.

Tractionless · 05-17-2024, 10:41 AM

Quote:

Originally Posted by DarkJak

Godzilla raceworks has the brace and aluminum driveshaft cheaper.

Godzilla sent me an unbalanced shaft then ignored my evidenced filled email when requesting a measly $75 refund for the rebalance labor which fixed the vibration issues. Of course this request did not include 6 hours of my time to index their shaft in the 4 available positions on the flange, test drives, and round trips to the closest driveshaft shop to me.

They laid blame on everything and anything but their product which wound up being the problem as noted above.

Tractionless · 05-17-2024, 10:47 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.

SG4247 · 05-17-2024, 03:55 PM

Quote:

Originally Posted by Tractionless

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.

That would have to be either your original Z TCM or the tune (either factory or aftermarket tune) on the ECM.

So a re flash at the dealer or your tuner should fix it.

Tractionless · 05-18-2024, 06:01 PM

Quote:

Originally Posted by SG4247

That would have to be either your original Z TCM or the tune (either factory or aftermarket tune) on the ECM.

So a re flash at the dealer or your tuner should fix it.

From what I've read only the line pressure can be controlled by a Tuner via manipulating the torque the ECM sees. Nothing's changed there and the trans behaves the same 3-4 but I picked up a 4-5 issue as well.

The TCM has been updated via TSB at Nissan so they say there's nothing else they can do. At this point I'm thinking failing TCM.

SG4247 · 05-18-2024, 08:41 PM

Hmm okay so two questions.

Do you have to buy a “service TCM” 2010 compatible from Nissan and have it flashed with the latest software revision, or will a used TCM from a salvage 2010 trans part number be able to be reflashed at the dealer?

I am surprised they were willing to update a VQ TCM in a VR transmission. My dealer said it’s all modified now, and didn’t act like they wanted to update my TCU which is still on the original 2010 flash program. Guess I could call another dealer.

Tractionless · 05-27-2024, 12:54 PM

Quote:

Originally Posted by SG4247

Hmm okay so two questions.

Do you have to buy a “service TCM” 2010 compatible from Nissan and have it flashed with the latest software revision, or will a used TCM from a salvage 2010 trans part number be able to be reflashed at the dealer?

I'd have to buy the identical TCM part number, unsure whether or not it would still have to be flashed to marry my ECU.

I am surprised they were willing to update a VQ TCM in a VR transmission. My dealer said it’s all modified now, and didn’t act like they wanted to update my TCU which is still on the original 2010 flash program. Guess I could call another dealer.

The update was done prior to the VR install; however, how would they know I have a VR trans. anyway if I don't tell them? I HIGHLY doubt they're going to poke around under the car to determine whether or not the trans. is OE when they are getting paid to perform and update or marriage to ECU. None of the electronics change in the swap just "dumb" hard parts so in that regard it's not modified.

Don't tell any dealer you swapped trans.' and just have them update.

05-03-2024, 06:40 PM	#394 (permalink)
SG4247 Track Member Join Date: Oct 2016 Location: OKC Posts: 786 Drives: 2010 touring Rep Power: 7842	On the driveshaft length… I measured the original driveshaft and just shortening it by 1/2” would be a really tight install on my car. The drive flange was very close to the pinion shaft threads. Then, after measuring the two transmissions side by side several times it looked like 3/4” shorter would be a little better choice for my 2010 model touring. I have a 2016 3.69 mt rear diff, with a different than stock pinion angle also. That may be part of it. Tractionless likes this. __________________ NA on E85 - 12.402 @ 112 mph 100 shot E85 - 11.589 @ 117 mph JWT C2 cams rev Base Circle & Titan Valves

05-09-2024, 08:24 PM	#395 (permalink)
SG4247 Track Member Join Date: Oct 2016 Location: OKC Posts: 786 Drives: 2010 touring Rep Power: 7842	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. EZT and rspray2000 like this. __________________ NA on E85 - 12.402 @ 112 mph 100 shot E85 - 11.589 @ 117 mph JWT C2 cams rev Base Circle & Titan Valves

05-12-2024, 03:39 AM	#396 (permalink)
DarkJak A True Z Fanatic Join Date: Jun 2011 Location: Madison, WI Posts: 1,397 Drives: 2009 370Z Rep Power: 16804	Godzilla raceworks has the brace and aluminum driveshaft cheaper. __________________ @stupidtoycars \| My track vids 09 7AT\|MCS 2WNR\|Topgunz Rotrex\|Ecutek (Eugene)\|Maxxis RC1\|Titan-7 TS-5\|OSG LSD\|Rear Mount Derale Oil Cooler (WIP)+25 Trans Cooler\|Fismo\|G-LOC R12/R10\|Zeta III L\|NLR Wing and Splitter\|CJM Pan and Fuel Hat\|Radium Surge Tank\|AP Racing CP9668

05-18-2024, 08:41 PM	#401 (permalink)
SG4247 Track Member Join Date: Oct 2016 Location: OKC Posts: 786 Drives: 2010 touring Rep Power: 7842	Hmm okay so two questions. Do you have to buy a “service TCM” 2010 compatible from Nissan and have it flashed with the latest software revision, or will a used TCM from a salvage 2010 trans part number be able to be reflashed at the dealer? I am surprised they were willing to update a VQ TCM in a VR transmission. My dealer said it’s all modified now, and didn’t act like they wanted to update my TCU which is still on the original 2010 flash program. Guess I could call another dealer. __________________ NA on E85 - 12.402 @ 112 mph 100 shot E85 - 11.589 @ 117 mph JWT C2 cams rev Base Circle & Titan Valves

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