VR transmission swap
 

I watched a video by Infiniti Brothers where they swapped a VR (Q50/Q60) transmission into a G37. Has anyone done this for the their car yet or know how feasible this is? Can't afford the built tranny quite yet, but word has it the newer trans can support up to 500wtq.

https://www.youtube.com/watch?v=IXBl7Kkuu8o

Looking to start a discussion about it and maybe a DIY thread in the future.

Yes guy on Facebook, it’s a straight forward install and pretty much bolts right up. Something with making a crank trigger switch hole bigger. I’ll try to find the link

So, it looks like what's needed is:

-Need to swap TCM from the 3.7 7at to the 3.0TT 7at
-Need to make a new hole for the crankshaft sensor on the transmission bell housing
-Need shorten driveshaft 1/2" (might not have to do on the Z because it's shorter than the G?)
-Need to fab a custom transmission bracket

What would a shop charge for labor? $1,000-1,500 or so?

I wonder if this would be worth it for N/A guys? The transmission does seem to shift faster from videos in the facebook groups

Being the G(Z) TCM is used and that's what dictates shift speed, are you sure the Q transmission (hardware) is doing the faster shifting or is there a tune involved feeding higher load commands to the TCM and making the Q trans shift faster?

My 7AT shifts pretty dang fast with the TCM getting higher load % via the ECUTek tune.

What's the FB profile name?

Look up Adel Taw in the "VQ35HR / VQ37VHR Discussion" group on FB. He's the 1st one I believe that did this swap on a G and has a few videos. His G is supercharged so there most likely is a tune involved making it shift faster.

Also, so far I haven't seen anyone attempt this swap on a 370z.

I think he did the video linked in my original post.

He swapped the solenoids from the G transmission to the Q transmission as well, i believe.

I agree that the shifting may also be adjusted with a tune, but I've also heard that the Q's transmission will hold more power.

Thanks guys maybe a viable option when OE Z/G transmissions let loose.

He did reuse the G solenoids as he said it would not shift with the Q's installed. Probably a disagreement with the G's TSM. I don't see why it wouldn't go in a Z as well as the 7AT's are the same between the G/Z.

This could be huge for the guys who realize their stock 7AT isn't up to the task once they catch the FI bug.

Just swap the bell housings. The trans itself is still a RE7R01A-there are differences in gear ratio’s-see attached. Only reason that you would have to swap valve body’s that have the TCM integrated would be due the logic for ECM mapping or for some reason the VR 7speed TCM software has some discord with the 3.7 ECM-though that shouldn’t be the case since the 3.7 has the same internals as a VR 7 speed. Looking at the wiring diagrams for both-only difference is the 3.7 uses pin 4 for ‘k’ line to the DLC. See attached pics. Also side note... a long time ago when the 3.0 first came out I wanted to see if a 6speed mated up with a clutch installed, and it sure did just crank position sensor holes were off.

Can’t just swap bellhousing, the transmission code is the same but got different internals, the reason you can’t just swap the bellhousing is because the vr30 torque converter is bigger than Vhr and it won’t fit in the VHR transmission housing, now you thinking maybe try the vhr torque converter and bellhousing and I say no it won’t work since the output shaft is longer and vhr torque converter won’t work.

So this is probably something I’ll never do because I’m not boosted but it is an interesting swap. I’m curious though for the people that are killing the stock trans is it the torque converter that fails or the internal clutches? I ask because rebuilding automatic trans can be fairly easy and straight forward (although I have no first hand experience on this particular trans) so does anyone just sell a higher count clutch pack for the stock trans? Typically in other trans (again no first hand on this one and it’s been a long while since I’ve done an auto) there is room to fit more friction disc, often they’ll add more plates and those just get used as spacers so you can remove some of the plates and add more friction disc. At least at one time this is how automakers would use the same trans with different HP ratings etc. if this is the same trans with different bell housing and torque converter then I wouldn’t be surprised if it’s using the same carriers with just a different friction disc to plate ratio.

I’d think this would still be an easier route than having to have a driveshaft made and doing all the missing but maybe that’s me.

Well, now that it's been proven that a VR 7AT can be swapped into a Z, anyone care to comment on using the Titan 7AT?
If the VR 7AT internals are more stout than the VQ 7AT internals, how about the VK 7AT internals?

Haven't seen the proof that the housing goes in the Z this post is about putting it in a G.

What's different between a RWD G and a 370Z? I thought these cars are interchangeable as far as the trans stuff goes.

Anyways, I have a Q60 VQ37, I only mentioned Z because this is a Z site.

Dunno but the OP said he's not sure the VR case will fit in the Z trans tunnel. Maybe you can be the guinea pig. :excited:

Nope. Just wondering.
With the new VR Z upcoming, I'd rather buy that than mess with frankensteining my Q

This is where I'm at... I was at 4 years 11 months and 22 days or 53,000 miles when my stock 7AT self destructed. 9 days before the 5 year warranty expired!

Fluid was changed at Carr Nissan in Beaverton Oregon ( yes I'm name dropping because they behaved immaturely during this entire process and would not take accountability nor responsibility ) @ 43,000 miles, after years of me asking if it did or did not need to be changed since I bought he car new. I love getting the usual answers. I'd think Nissan would have a very very very simple communication on this topic.

EITHER:

A) The fluid needs to be changed at _____ miles/time interval

OR

B) The fluid does not need to be changed. End of story.

For nearly four years I received answer "B" from Carr Nissan.

After driving a POS Sentra (seriously, I'm convinced a commercial public transportation BUS has better braking and acceleration response!!!) for over a month, they finally got me my car back.

The invoice now says: "Rebuilt transmission" $6800.. Luckily I didn't pay anything for this.

Fast forward to present day ( 74,000 miles ): For the past 5-8k miles ~ 12 months, the 3-4 up shift is strange, almost like the rpms JUMP, then it HAMMERS n locks. It only does this under ANY situations EXCEPT full throttle or very light acceleration, and most often when the car is warm. I cannot figure out if this is a line pressure/temp/viscosity thing, or a TCM thing?

I really just enjoy the acceleration from 1-2-3 and then let off and ease into 4th if I'm on surface streets. Luckily I CAN go all out while getting on the freeway, but occasionally in 4th gear it almost feels like a surging type of behavior, especially on hot days here in Phoenix. To me this just seems like the 4th gear clutch pack is shot? who knows.

I'll have Nissan change the fluid and fingers crossed that will buy me some time to get me to the updated Z, in which I won't go with another Auto. It's just not worth it. Short of the GTR, I'm not convinced Nissan knows how to build a reliable AT.

Sadly my 370z may be just your dedicated walmart grocery getter while a new Z with a MANUAL trans sits in the garage :driving:

Care to post or link to the write up for the swap? I don’t have IG. TIA!

Youtube video on post #1 says it all including no one has tried it in the Z. Simply need to swap our TCM into the VR Tranny and shorten the driveshaft.

How’s it holding up? I’m considering this for next year. Seems the transmission mount upgrade is a no brainer. Regarding driveshaft, is the VR one the right length when swapped, or is there a 3rd party (ideally 1pc aluminum) option that doesn’t need cut?