Frontier transmission works!

[elwesso]

http://www.nissanperformancema...q35hr/

2 Paragraphs below the picture of the head:

"The rear of the block has the same bellhousing bolt pattern as the VK45 and 56 as well as the VQ40DE, some interesting info for all of you swapaholics out there."

GRRRRRRR........

so really this only applies to VK guys? Still interesting, may actually turn some people toward a VK swap even though a VH swap would still be better and cheaper IMO.

[mtcookson]

I don't believe that article is correct. Sean has a picture of the VK45 at the top which definitely has a different pattern. Unless the VK56 is different it seems as though we're still stuck with adapter plates no matter which engine is used.

[SeanDean]

So I guess that takes us back to this:



http://www.wilcap.com/webdoc2.htm

[SeanDean]

so really this only applies to VK guys? Still interesting, may actually turn some people toward a VK swap even though a VH swap would still be better and cheaper IMO.

Nah, I was just referencing the incorrect article that led to this whole thread......

That information is totally incorrect.

[SeanDean]

HAH, too bad I didn't remember this thread:

zerothread/228128

[maxnix]

I've heard the stock slushbox is notorious for failure and would rather swap in a manual than replace/rebuild the stock auto (when and if it fails).

You haven't heard that on any boards here. It is well understressed by the VH41DE and with regular ATF fluid exchanges and an auxiliary ATF cooler, should last close to 200K easily with lilttle degradation in shift times.

[Haitian_King]

So the Frontier transmission isn't an option for a G50?

[mtcookson]

Correct. Still have to stick with adapter plates.

[Haitian_King]

Still confused.

Throw an adapter plate on there and it'll work?

[mtcookson]

Sorry. The Frontier/Z/G transmission won't bolt up. If you do want to use one you will have to get an adapter plate made as there aren't any currently being made to adapt the 6-speed to the VH that I know of.

Unless you're building a high revving NA VH, the 5-speed would be a little better suited to it in the end though.

[Haitian_King]

Ah. That's what I was looking for.

How difficult is it to fashion an adapter plate for a VH45DE and mate it to a 5speed AT?

Is the plate something that's readily available for purchase? Which 5 speed would suit the car best?

What parts would be needed? I wouldn't have to replace the driveshaft and things of that nature would I?

I'm sorry for all of the questions, but I'm curious to see if there is another option for the Q45 other than the standard 4 speed.

[mtcookson]

You're looking for an automatic 5-speed? I think you're have to be looking for something pretty new to get a AT 5-speed. I know the latest Q45's had a 5-speed automatic. If you can find one I'd first check the bolt pattern of the bell housing to the transmission. You might get lucky and could swap the bell housing itself.

Depending on the length of the transmission and the output shaft used in most cases, when doing a transmission swap, you will have to get a custom driveshaft.

Another thing to consider is the transmission linkage and more importantly the transmission's computer. You'll likely need the TCU out of the car you're getting the transmission from and there could be incompatibility issues trying to run the newer TCU alongside the older ECU and sensors.

I'm not too well versed in AT's but those are some of the things that come to mind that could potentially cause the swap not to work.

[Haitian_King]

I should have known. Nothing comes easy with a Q45. Especially a G50.

Thanks for your help though. It was just something I wondered about.

[SeanDean]

If you originally wanted a manual transmission, then get the Wilcap adapter plate to mount a 350Z 6speed trans, or the Mazworx adapter to mount a 300zx 5speed.

Or if you'd like a Supra 5speed, then wait about 15 more years and I might be done with my adapter kit.

[tmorgan4]

I'd never heard of Wilcap before so I looked them up...Look what they list on their website.



It doesn't look like a VH bellhousing pattern, though. Just says "Nissan V8 to V6 5-speed."

[Haitian_King]

No, not a manual. Just a faster automatic transmission for my VH45DE.

[mtcookson]

Ahhhh, if you want something faster you can build up the stock automatic to shift real fast. I believe a standard valve body modification will make the shifting quicker. I'm sure there are many other tricks to make it shift quicker as well.

You may check these guys out. They are pretty well versed in import transmissions and they are in NJ. http://www.importperformancetrans.com/

[Haitian_King]

Sweet. Thanks for the info. I might be replacing my transmission soon and I was considering other options than stock.

[XJared]

Old thread, and I didn't read all of it, but some information I've recently measured out: VH and VK are not the same. VQ30 and VQ35 are the same, but VQ40 all is a whole different animal. VQ40 and VQxxHR are the same though. I'm now trying to get past the flywheel issue. I have verified that the VQ crank bolt pattern is the same as VK, now checking ring gear depth.

[XJared]

More information on crank bolt pattern. VQ = VK = VG = VG but ring gear offset is very different based on engine, generation, fwd/rwd, and starter loc.

[XJared]

oh, and make the exception that vqXXHR = vq40de but neither are the same as old VQ30/35

[tmorgan4]

While some VGs (300zx models) share the same bolt pattern as the VH, not all of them do. The VG that came out of my Pathfinder uses a 6 bolt flywheel and crank. Not sure what (if any) models got the 8 bolt crank besides the 300zx.

[XJared]

While some VGs (300zx models) share the same bolt pattern as the VH, not all of them do. The VG that came out of my Pathfinder uses a 6 bolt flywheel and crank. Not sure what (if any) models got the 8 bolt crank besides the 300zx.

True, I don't know all of them off the top of my head, but I'm certain the Z31 300 has a 6 bolt flywheel. They may have changed them to 8 bolt with the VG33, can't remember.

[SaintlyCharBoy]

this is by no means gospel, but I was under the impression that only turbocharged VGs had an 8 bolt flywheel

[tmorgan4]

Not quite...all the Z32s used 8 bolt flywheels and cranks whether they were NA or Turbo.

[Stinky]

Vg30e/et = 6 boltVg30de/det/dett= 8 bolt

[mtcookson]

VG33E(R) - 6 bolt

VE30DE - 8 bolt (basically a narrow version of the VG30DE built for the 92-94 Maxima, it uses a 240 mm setup and would probably work... but they're somewhat uncommon so there's not really any reason to use one)

[SSDwellah]

I know this is an old thread, but I believe that the VG30E and VG30ET in the last few years of 80's 300ZX switched to an 8-bolt pattern. Just check out aftermarket flywheel suppliers and see how the late Z31 usually has the same part flywheel as the Z32. I think the maximas kept the 6-bolt (except for the bastard VE engine) until they changed to the VQ series in the USDM 95+ Maxima.

Also, from what I could gatherVQ35HR pattern = VQ40DE pattern = VK45DE Pattern (don't know for sure about this last one, only heard rumors)

[Stinky]

The Z31 never had an 8 bolt flywheel in the US market. There might have been a model in japan that had the vg30de but nothing any of us would run in to. The flywheels did change to a 250mm size in the 87-89 turbos that uses the same clutch disc as the z32 but the flywheel was never the same.

[XJared]

I just wanted to clarify some info in this post as well as ad some personal experience. The VK has a unique pattern as does the VH. The VQ is the same forever until you get to the VQxxHR which has the same pattern as the new VQ40 (they both have bigger cranks and bellhousings)

On the personal experience, I tried to get Wilcap to build one of those adapters for me. I'm thinking, it is listed on their website, probably in their CAD system, should be quick, right? Way wrong. After 1 year and 4 months of excuses and total bull s***, I had someone else do the adapter for me.