Using the RB26 transmission...

[Vkoslak]

I'm not 100% sure on this, but I think any bits associated with the fwd would need to be removed. If for no other reason than its robbing horsepower. More importantly, the front being out of sync with the rear all the time would cause problems I would think. Heat, friction, etc.

[ATpossible]

no prob man im sure i do it sometimes 2. however i dont know much about how the transmission splits torque with physical connections like this hydraulic line u speak of.

however i did notice lines like that going to the transmission as well as sensor connections. i did read that the "THING(S)" that splits rear torque to front are from sensors telling it that the rear is slipping or losing traction and to give X amount of torque to the front up to 50/50. not sure of anything else.

I'm not 100% sure on this, but I think any bits associated with the fwd would need to be removed. If for no other reason than its robbing horsepower. More importantly, the front being out of sync with the rear all the time would cause problems I would think. Heat, friction, etc.

well some replace the oil pan w/rb25 oil pan or some have kept the rb26 oil pan but welded shut the openings where the diff/axles went. these are the only 2 options ive heard of.

fyi if you remove the front driveshaft then the front and rear wheels arent connected anymore by the transmission so i dont see how it is possible to be out of "sync" since the front can only be driven by the transfer case and front driveshaft which will be removed. however it's best to remove the rest of left over stuff like axles etc. to get out of way if your not doing awd

what rob of power? unless your talking wasted engine power to pull died weight not doing anything.

[PcCypher]

Well the transfer case is only connected by a chain and the transfer case would have nothing connected to it, so I believe that hp loss would be minimal. Remember this is going into an s14 so I won't have the front axels and dif. I'm not sure how I am going to handle the oil pan yet, I have used the rb25 oil pan but I have heard people complaining about the design stating that the 26 is an overall better design. Super Street did a write up with sycho's engine mounts and they were discussing the oil pan.
Modified by PcCypher at 6:12 PM 4/23/2007

[PcCypher]

"When I went through this dilemna (briefly because of simplicity -- the decision made itself basically) I found out that you can't just use the AWD transmission and disconnect the front drive-shaft because of some kind of thing that will make the ATTESA freak out. Adversely, if you disable the ATTESA, the residual friction of those gears spinning freely might not sound like a bad thing, but its not exactly like a 4x4 pickup truck transfer case where the gear completely disengages and the two ... "drivetrains" aren't even connected. I don't know how accurate all of this is, but I was under the impression that it WOULD in fact cause damage, however immediate said damage is ... is rather unknown if I remember correctly....

But. I do know this. Unless you've got money to piss away. Its not exactly an economical or even smart thing to do."

Response from someone on another forum... any thoughts?

[driftjunke]

We ditched the modded AWD transmission, and swapped a 26 bellhouging over to a Z32 transmission, made custom linkage, cost about 200 bucks in parts, including transmission.

E

[ATpossible]

not to say whoever told you this is wrong but im not sure i agree...here is my newb reason and im no expert or engineer for the record-

could you maybe or possibly the person who said it explain what happens when the transmission is only in rwd mode? because that is the way the transmission is. it is not exactly "awd" being that it is strictly rwd until it loses too much traction then it transfer up to 50/50 torque.

so is he/you telling me that 75%+ of the time when the transmission is only in rwd that it is hurting the gears of the transfer case? doesnt make sense to me. could you explain for me since i might be wrong?

why would the attessa freak out? because it nevers gets to drive the front wheels? full race elimated attessa. am i missing something? check below

http://www.full-race.com/r14/faq.php#q10

jus thought i'd reply, remember im jus a newb trying to help

[Vkoslak]

My thought was that when you are driving a gtr, even if no torque is being sent to the front, the wheels spinning would cause the axle and drive shaft to turn at either the same speed in a straight line, or reasonably close around corners. Maybe the guys at full race could explain better, since they have an after market system that can be turned off, whether there is any risk to the transmission.

[Carl H]

the only 6speed awd box EVAR was on the r34 vspec 2 nur, its a getrag box with internals identical to the supra getrag.all other r34s were 5 speed.as far as atessa goes, only the r32 had an atessa system that could be fully disabled via pulling a fuse, when they converted to atessa pro in the r32 vspec and the r33 and up the only torquesplit you could get at a min was something in the range of 10/90 vs the old r32's 0/100.

[StricNyne]

getrag ftmfw

[johnzm]

someone sell me a GTR AWD trans

mail me [email protected]

[klh6686]

the only 6speed awd box EVAR was on the r34 vspec 2 nur, its a getrag box with internals identical to the supra getrag.all other r34s were 5 speed.

I'm going to have to say a big negative to that