RB26 RWD transmission Options

Post by **Scott Buwalda** » Wed Dec 03, 2003 8:06 am

Heya guys:

I just got off the phone with the guys at JDM Parts Plus, the company that's importing my RB26 clip. It's in a container, and off to port. By all accounts, it'll be here by the middle of January.

So now it's time to get serious about a transmissison. I have the oil pan, crossmember, mounts, and etc. But alas, no RWD transmission yet.

I absolutely REFUSE to pay $1,500 for an RB25 transmission from the company out west. I have sourced suppliers in Australia for around $1,200 shipped, but still too rich for my blood.

So, what are my options? Please, please respond with first hand experiences, not what you think might work, or what your best friend's cousin's sister's brother in-law did. Will an NA Z32 transmission work? (they have the same part number). What's this I am hearing about adapter plates? Any sources for an RB25 transmission (reasonable, not highway robbery). They're going ALL THE TIME in Japan for 20,000 to 40,000 Yen (around $160 to $360). Shipping CAN'T be $1,200!!! Talk to me guys. This is the last thing I'll need for start-up...

Thanx,

Scott

Post by **Nameless EJ6** » Wed Dec 03, 2003 8:06 am

The only transmission you can use for swapping into a 240 is the RB20 or RB25's.

Post by **spec-u-later** » Wed Dec 03, 2003 8:06 am

I have heard of people using a slightly modified getrag supra tt trani for drag racing.

Post by **JeffTN** » Wed Dec 03, 2003 8:06 am

Scott Buwalda wrote: What's this I am hearing about adapter plates?

Are you talking about th350/400 adapter plate? If so, PROJECTRB240SX was checking in to that for his setup, but I dont think that it has gotten very far. Not too many skylines using these trannies. I have been reading on the supraforums about it since it would be a similar setup.

Post by **Joe** » Wed Dec 03, 2003 8:06 am

you can probably put a NA 300zx transmission on there with an adapter plate

they use the same cutch so the input shaft spline count are the same so all that would be left is mating it to the block.

Post by **Imissmyturbo** » Wed Dec 03, 2003 8:06 am

Is the NA Z32 transmission have the same shifter setup as the turbo? If so that may be a problem cause I know the Turbo Z32 trannys have a linkage setup for the shifter rather then the other Nissans that have the shifter in the transmission.

Post by **Imissmyturbo** » Wed Dec 03, 2003 8:06 am

I just got a wild idea...How about running the RB26 transmission without the front end hooked up? You could either plug up the output hole for the front driveshaft or run the front driveshaft with out it hooked up. You would need to do some cutting and welding to the passanger side of the transmission tunnel but I don't think that would cost more then 300-400.

Post by **Joe** » Wed Dec 03, 2003 8:06 am

you would have to make a HUGE dent in the transmission tunnel to fit the front differental

here is a picture of the getrag 6 speed.

http://www.exvitermini.com/pics/getrgn1.jpg

Post by **Nameless EJ6** » Wed Dec 03, 2003 8:06 am

I'm sure you could work the RB26 transmission into the 240 with some cutting and welding. I actually don't think that would be a terribly bad idea and it shouldn't an extreme amount of work to pull off.. although it is definetely work!

I've seen alot of custom floors and tunnels in cars.. and by looking at them I really don't think it would be hard if you have the equipement and tools. I'd like to see someone do this. But as for myself, I'm sticking with the 25 transmission..

Post by **Nameless EJ6** » Wed Dec 03, 2003 8:06 am

Here's the rb26 box for kicks. It looks a little more beefy/heavier than the getrag. I certainly wouldn't like to be under a car dropping that thing.

http://www.we-todd-did-racing....DE%3D

Post by **IvoryJ30t** » Wed Dec 03, 2003 8:06 am

one thing im wondering, is if the internals of the rb25det trans and the z32tt trans are the same, if the frontcase and bellhousing of the rb25det will bolt up to the z32tt trans.

im sure it would be alot cheaper to get the front case than the whole trans.

and just set the car up to take the z32 trans. if you blow it up, you got a replacement not too far away.

Post by **FAST-DATSUN** » Wed Dec 03, 2003 8:06 am

Some of the internals of the 300Z trans and the RB25 are the same. However the shifting mechanicals are totally different as the 300Z have the shifter mounted to the car body and not part of the trans. The Rb26 AWD trans can be fitted but its extremely heavy and will require mods to the body. So many US companies want to by the RB25 trans NOW which has driven the price up in Japan. I know you can buy them faily cheep there(at least you used to be able to) but must exporters/shippers there have more than doubled there prices in the last few months and expect the price to go up again soon.. Its supply and demand for prices everwhere..

Post by **IvoryJ30t** » Wed Dec 03, 2003 8:06 am

no, i understand the shifter mechanism is different, but if the front case from the rb25det trans will bolt up to the z32 trans, you set the car up for the z32 trans. if you blow the trany up, remove the shot one, pull the front case, get a replacement z32 trans, swap front cases, and reinstall in car.

Post by **FAST-DATSUN** » Wed Dec 03, 2003 8:06 am

Its might be possible to move the internal around with some work, but the trans are different length. There would have to be some mods to the shifting mech as ti is about 6" forward of where the Skyline RB25 shifter would be. The only way to find out is to try it. I would do alot of checking before taking them apart, and then there the problem of finding a RB25 front case. The RB trans is used behind some big power car's in Japan and work fine. if you worried about breaking it then I would go to a PG or a 400 auto trans..

Post by **Nif** » Wed Dec 03, 2003 8:06 am

Part of the reason for the 300 transmission having the shifter farther forward is the shorter bellhousing/front cover. By replacing the 300 front with the rb front you'll gain a little. Furthermore use of the 300's shtfting mechanisms will allow more flexability in shifter placement. It does require more fab work though.

Post by **IvoryJ30t** » Wed Dec 03, 2003 8:06 am

yeah, probably just not worth it. im not looking forward to a 1k+ used trans either.

Post by **FAST-DATSUN** » Wed Dec 03, 2003 8:06 am

The bellhousing IS the same lenght on both of the trans as the forward gear set are the same, the differance is the rear case, and out put shaft and shift linkage. You could modify the shift linkage.

Post by **Scott Buwalda** » Wed Dec 03, 2003 8:06 am

Yeah, I've got one lined up in the UK, with 44,000 original miles. Problem is, the US dollar sucks right now in comparison to the Brittish pound. $1,250 including shipping...

Still looking...

Scott

Post by **JCAP_Tuning** » Wed Dec 03, 2003 8:06 am

Scott, have you checked the Australian boards? I found a few there.

_Justin

RB26 RWD transmission Options

RB26 RWD transmission Options

Re: RB26 RWD transmission Options

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