PDA

View Full Version : Transmission and rear end torque ratings!


SykotikCamber
11-03-2015, 09:56 PM
So I'm planning on building a S13 JDM coupe with a 4bt cummins motor in it. Well I need to know if the transmission and rear end will hold up to the close to 300+ ft/lbs of torque. By the way I will have a standard transmission of course. So if anybody knows the torque ratings of the stock transmission and rear end it would be appreciated. If need be I can always beef up the rear end and put a different tranny in it, which if anybody has any ideas, throw them at me. And the car will be used to pull my track car on a trailer and drift spares on the top so the tranny needs to be tough. Thanks in advanced.

anti tyler
11-04-2015, 04:47 PM
You need to worry about the clutch not tranny. Yet the car itself isn't meant for towing so I can't comment on that aspect.

However my stock 5 speed tranny is holding 375ft lbs just fine...

But stock open differential? I wouldn't tow anything on a trailer with that anyway. No sense in breaking things when you can swap them out for more appropriately heavy duty things like an LSD and stronger axles...

SykotikCamber
11-04-2015, 07:39 PM
Oh it was going to have the lsd anyway for sure. I didnt think about the clutch thats a good idea. Definitely need to upgrade that!

Frank_Jaeger
11-04-2015, 09:16 PM
As long as you're not shocking the drivetrain the trans will be fine. No sticky dragstrip launches for you.

The rear diff is apparently indestructible.
https://s-media-cache-ak0.pinimg.com/736x/22/b5/e1/22b5e1a5ebd685fa04825d3a022d94b2.jpg

SykotikCamber
11-04-2015, 09:22 PM
Lol cool I'm going to take it easy on that car anyways. My drift S14 will be my car I take it rough though. She'll have a SR22DET in it lol.

cotbu
11-05-2015, 10:17 AM
Too many red flags in this thread.

How many regular miles you got on it? None, it takes premium!