AnDyMaN

iTrader: (19)

I want to know what everyone, that is running a 3.5 swapped motor in their max, is using as far as transmission/clutch (if applicable)/any mods/ miles. I'm asking because I want to know how well everyone's tranny is holding up with power.

also is there any other option for us other then using maxima tranny's? 6speed = way to expensive, but altima, sentra spec-v (im assuming it'll be expensive as well)?

btw, didnt sr20den post info on the max power that the tranny's could hold or something along that line and that the 4th gen and 5th gen manual transmissions already at its peak? i believed this was mentioned, i just don't know where the thread is.

eng92

iTrader: (3)

Is this the info you are referring to?
http://www.aichikikai.co.jp/english/mission.html



The rated input torque numbers should come as no surprise to anybody. These are transmissions for mass production vehicles, not race cars. They cannot be substantially overbuilt and still be cost effective.

OEMs provide companies like Aichikikai with tranny specs for torque handling, gear ratios, space constraints, etc. The supplied transmissions are built to spec with industry standard design factors. These factors are high enough that a negligible number of failures will occur when operated within the specified design parameters for the rated life of the unit.

Design factors are generally proportional to the potential for personal injury or property damage if a failure occurs. In the case of a stock transmission, it would need to be able to withstand high rpm clutch dumps with the stock clutch without failure. The stock clutch has to fail first. This ties right back into minimizing warranty claims. Transmissions are warranted parts, clutches are not.

You can transmit substantially more torque through these transmissions than what the numbers indicate without any problems. The key is smoothness.

mforrest100

iTrader: (24)

Unless you are going boost there is no need to be concerned with max power. 4th gen 5 speed trannies are handling up to 350whp from boost. A 3.5 N/A with a great tune and mods will probably get you the most 280. And I say this because this is the highest N/A dyno so far. But my point is 4th gen tranny should be fine. But the 6 speed will put up with some power if its boost you are going with.

AnDyMaN

iTrader: (19)

i c, well durability is my main concern, but I guess since people have been putting power down, my 5 speed shouldn't be something i should worry about. but btw, should the need arise, how would fitting an altima transmission work? would it require further modification other than the tranny itself?

scrhale

You are referring to the 3.5 Altima tranny right? If I had to put some transmission from the 3.5's, I would choose the A34 transmission. Heh ... more aggressive final drive FTW!

AnDyMaN

iTrader: (19)

what do you mean? you mean using the whole a34 tranny? doesnt that require ecu requiring drive by wire = lot more time/extra ****e.

scrhale

Transmission and ECU are totally unrelated minus the speed sensor. There are a select few 3.5 swappers with 6 speeds. Granted some of those folk have the 3.5 ECU, it is not required. It also does not require drive-by-wire. If you keep the 3.0 ECU perform the hybrid 3.5 engine swap then you will have to adapt the 5SPD timing ring onto the 3.5 flywheel. Don't ask me how it is ... I am just very good at regurgitation. Look up the 3.5 ECU thread I started a while back ... I think it is eng92 that explains it.

Weimar Ben

iTrader: (5)

the 5spd is fine as long as the diff. bearings are shimmed correctly. Problem is that nearly all of them have or will have bearing problems.

JClaw

iTrader: (17)

The 5-speed will be fine N/A as long as you do not have a hardcore clutch. Get a 5th gen clutch and you'll be fine. It's cheaper than an aftermarket, too (~180-200$ vs 300-450$).

AnDyMaN

iTrader: (19)

i c. i like the oe clutch, so i think i might just get it.

also, scrhale, would you be able to find that thread? I foiund a thread with eng92 but its of different content... i believe.

scrhale

http://forums.maxima.org/showthread.php?t=487345

Bottom of post 9

GodFather

iTrader: (10)

Sorry I can't help with the 6-speed info.

Here's a summary of my 3.5 swap with the Altima 5-speed internals thread:
http://forums.maxima.org/showthread.php?t=487198

Also, you can click my signature to link to my homepage. It'll show you a complete list of my mods with my 3.5 swap.

-Peter-

AnDyMaN

iTrader: (19)

thanks for the info godfather. altima internals is nice, but i believe that is for the 2.5 altima right? the 3.5 internals should be much stronger shouldn't it?

and if it is much stronger, would it be able to swap into the 00 tranny bellhousing? i remember people talking about using altima clutch and stuff and how it wouldn't work on a maxima, so I'm hoping that this isn't a repost.

lastly, as far as clutch vs tranny wear, is chirping tires a big wear on the tranny/clutch? i use to do it all the time. i'm not much of a clutch dumper, more of a fast shifter.