How much horse power can my stock transmission take before it goes. It's a 6 speed on a 03. Don't want to start doing all these mods and find out I needed a stronger transmission.

 

Wouldnt worry about the transmission, the stock clutch will be the first thing to go.... only mod I had was a smarty on level 5 lasted one sled pull and it was cooked!(66,000 miles)

 

If you don't lug the motor (below 1500rpm) the go full throttle, I'd say you are safe with a Smarty on medium settings.

Drop the rpm below 1500 then give it full throttle and that clutch will slip easily especially if you are towing.

I would hold on to the 5" exhaust and get a good clutch, approx $ 750

 

I don't know much about the NV5600 6 Speed. I had an 2005.5 with the g-56I just sold. I had a dual disc valair clutch in it and I was pushing alittle over 500 hp. Never had a problem at all.

 

HP and Torque levels are not really the deciding facters. It's use. One or two sled pulls, or half a dozen drag strip runs and it's done. Hook it up to 15K# and drive across the Rockies a few times will really beat it up. But it will last for years on the street if driven right.

 

680 foot pounds of tourque is the max.

 

Thanks for the replies. Shure am glad I always drive sticks. Been reading about guys having automatics and being told that 60 extra hp was all they would take.

 

Depends I guess. I never use all my horsepower anyway. How many of us have our foot mashed to the floor?