Like the title says... Let me supply alittle more info, my friend has a S5 NA with the clutch lsd, and stock everything else. How much power can the whole drivetrain hold? More less what can the tranny hold?

Also would it be beneficial to upgrade to the TII drivetrain? ANd does anyone know of power loss between the NA and TII drivetrains?

 

37 minutes and this needs a bump??

do a search. this question's answered many different ways. bottom line, many members have done the tii upgrade with a na trans and doing fine. Yet other straight na owners with little or no mods are eating tranny's. i believe its a function of how you beat on it more than the power its handling.

 

Oh, and do a search on different tranny fluids. Some feel synthitics are shorting the life of the NA brass parts.

 

mine took an estimated 250rwhp before the motor blew. the drive train is still perfectly fine.

 

If you really DRIVE the car the NA tranny will break over and over again. I went through 2 NA Trannys in a year and called it quits. Upgraded to TII drivetrain-- it'll bring you that much closer to the engine swap...

 

what do you considder "driving" the car? if you mean drag launching at every stoplight/stopsign, then yeah the tranny will break real fast.

just drive sensibly around town and have some fun at the track/strip. it'll be fine as long as it wasn't damaged before the swap.

 

sustained speeds, higher rpms. Even though I always take care to rev match upon downshift, the bearings and synchros still went to hell

1st tranny went down due to input shaft, 2nd was due to bearing failure

 

hmm, thats weird cuz mine has no problems with seeing 15psi on a daily basis and with the harsh grabbing 6 puck clutch and HD pressure plate i've got. hell, the motor went before the tranny did. hehe

 

Driving style and maintainence will influence drive line longevity more than anything else.

Normally it would be expected that the non turbo driveline can handle around 200 HP and 175-200 ft lbs, however, if you have a fluid and better than average smooth shifting and driving, the non turbo drivelines can easy handle 250 HP.

But abuse it, or fail to regularly change fluids, or have a less than smooth driving style and you will blow through trannys and rear ends very very fast.

 

I always heard about 200ish hp before somethign started to slip (probably clutch) and what not. I could be way off though...

 

The N/A clutch gives out around 190-200 (trust me, haha) We'll see how long my tranny holds up to 12psi once i get the new clutch in.

 

Is there anyway to reinforce the NA tranny?

 

Ive seen the n/a rear end hold up behind a v8 and my tranny and rear end held up to a 100 shot of n20 before the driveline snapped in 2

 

.A high level of grip matched with power killed my old NA setup.

The JICs on a hard damping setting in conjunction with the Azenis overwhelmed the differential and transmission in 5 mins of oversteer oriented driving

 

Basically what icemark said is what i believe.. If you dont do 6k launches etc (which you shouldnt be doing with NA drivetrain anyways) then it twill last much longer. Just baby it somewhat if your goign to be running high power.

 

From what I've seen the TII tranny's can handle at least 300hp. A guy I know is pushing 730rwhp on a stock drivetrain. On a FD of course but it makes for a 10 second car at high elevation.

 

in the swap from n/a trans to t2 trans do you have to use a t2 counter weight?

 

Well my friend is going for somewhere around the 190-220 hp mark and intends to do alot of time attack, so it is not going to be babied. I am sure the Diff, half shafts, and driveshaft can handle that power, but I doubt the tranny will, but what is nice is the lighter weight of all those compnents, so that is why I have been asking about how much power or if you can reinforce the tranny to hold more power...

Oh also, I doubt he will be doing any 6K launches, maybe 3K at the most, he is not really a drag racer, if any thing just doing rolls from like 30 or so....

What usuaully breaks in the trany when it goes? SO far I see input shaft and bearing failure, any thing else?

 

Anyone?